{"id":16384,"date":"2026-11-12T11:00:00","date_gmt":"2026-11-12T11:00:00","guid":{"rendered":"https:\/\/bioprofile.com\/?page_id=16384"},"modified":"2026-11-12T11:20:56","modified_gmt":"2026-11-12T11:20:56","slug":"pth","status":"publish","type":"page","link":"https:\/\/bioprofile.com\/en\/biomarkers\/pth\/","title":{"rendered":"Parathyroid hormone"},"content":{"rendered":"\n<div id=\"content\" tabindex=\"-1\"><\/div>\n<style>@import url('https:\/\/fonts.googleapis.com\/css2?family=Poppins:ital,wght@0,400;0,600;0,700;0,800;1,400&display=swap');\n\/* ===========================================================================\n   BioProfile advertorial, the design Jesse approved on 2026-07-30, expressed\n   as a WordPress design system.\n\n   THE @import IS LOAD BEARING and must stay the first thing in this sheet (a\n   CSS @import after any rule is dropped by the parser). elementor_canvas does\n   not enqueue the theme's fonts, so without it the whole page falls back to the\n   system font. Caught by LOOKING at the live page on 2026-07-30, right after\n   the template was switched to canvas.\n\n   Everything is scoped to `.bp-adv`, so nothing here can reach the rest of\n   bioprofile.com, and core blocks are styled BY ELEMENT so a heading, a\n   paragraph, a quote, a list, an image or a button inserted by hand inside the\n   advertorial comes out on-design with no class to remember.\n\n   Jesse's design feedback, 2026-07-29 23:38, point by point:\n   1. the light green and the dark green are the preferred colours; grey may be\n      used but the page must NOT open grey;\n   2. more colour and variation across sections, e.g. a colour block on the left\n      or the right side of a section, without overdesign;\n   3. ONE H1, plain text on white; everything else H2 or H3; an H2 may carry its\n      own background colour so the page can be read from the headings alone; an\n      H3 keeps its section background and gets a bigger font size;\n   4. reuse the results page design feel;\n   5. Written by \/ Verified by, the placeholder blocks and noindex stay.\n\n   COLOUR PROVENANCE. Not one hex is invented.\n   - #b7cb32  LIGHT GREEN, brand manual \"colours rejuvenation protocol\"\n              (R183 G203 B51). Same value as --bp-lime in\n              brands\/bioprofile\/brand\/tokens.md.\n   - #006b62  DARK GREEN, brand manual, nourish the cells (R0 G107 B98).\n   - #005859  brand manual primary teal, the value the brand is built on.\n   - #228a62  brand manual, challenge the body (R34 G138 B98).\n   - #7ca64c  brand manual, calm the mind (R124 G166 B76).\n   - #dbd4cd  brand manual \"additional color\", the warm neutral.\n   - #B7CB3329 is the brand token --bp-lime-soft (light green at 16 percent).\n   - the gradients are the brand token layer's own, copied verbatim.\n\n   SPECIFICITY NOTE. Elementor's global kit emits `.elementor-kit-6 h2` style\n   rules at (0,1,1). Element rules below are written `.bp-adv h2`, also (0,1,1),\n   and win on source order because this sheet is inline in the body while the\n   kit is a <link> in the head. Component rules that MUST NOT lose carry two\n   classes, e.g. `.bp-adv .wp-block-button__link`.\n\n   LAYOUT NOTE. Vertical rhythm uses `margin-block` and never the `margin`\n   shorthand, so the measure rule `.bp-adv-sec > * { margin-inline: auto }` can\n   centre a block without being outranked by its own element rule.\n   =========================================================================== *\/\n\n.bp-adv {\n  --bp-ink: #212527;\n  --bp-teal: #005859;\n  --bp-forest: #006B62;\n  --bp-emerald: #228A62;\n  --bp-olive: #7CA64C;\n  --bp-lime: #B7CB33;\n  --bp-lime-soft: #B7CB3329;\n  --bp-sand: #DBD4CB;\n  --bp-white: #FFFFFF;\n  --bp-foot: #6b6b6b;\n  --bp-grad-dark: linear-gradient(237deg, rgba(0,88,89,0.00) 62.94%, #005859 100%), linear-gradient(90deg, rgba(34,138,98,0.00) 40%, #228A62 100%), #006B62;\n  --bp-grad-lime: linear-gradient(110deg, rgba(183,203,51,0.00) 36.06%, rgba(183,203,51,0.25) 97.65%), #FFFFFF;\n  --bp-font: 'Poppins','Segoe UI',Arial,sans-serif;\n  --bp-fs-h1: 44px; --bp-fs-h2: 31px; --bp-fs-h3: 24px; --bp-fs-pre: 15px;\n  --bp-fs-body: 17px; --bp-fs-small: 14px; --bp-fs-foot: 13px; --bp-fs-btn: 17px;\n  --bp-lh-body: 1.75;\n  --bp-s-1: 4px; --bp-s-2: 8px; --bp-s-3: 12px; --bp-s-4: 16px;\n  --bp-s-5: 24px; --bp-s-6: 32px; --bp-s-7: 44px; --bp-s-8: 72px;\n  --bp-measure: 760px; --bp-side: 40px;\n  --bp-radius-photo: 16px; --bp-radius-btn: 10px; --bp-radius-card: 20px;\n  --bp-shadow: 0 10px 30px rgba(0,88,89,0.10);\n  font-family: var(--bp-font);\n  font-size: var(--bp-fs-body);\n  line-height: var(--bp-lh-body);\n  color: var(--bp-ink);\n  background: var(--bp-white);\n  -webkit-font-smoothing: antialiased;\n}\n.bp-adv, .bp-adv * { box-sizing: border-box; }\n.bp-adv p, .bp-adv li, .bp-adv h1, .bp-adv h2, .bp-adv h3, .bp-adv blockquote,\n.bp-adv a, .bp-adv cite, .bp-adv span { overflow-wrap: break-word; min-width: 0; }\n\n\/* THE TOGGLE. One word in the block's own \"Additional CSS class(es)\" field\n   hides an optional component on the front end without deleting anything. *\/\n.bp-adv .bp-off { display: none !important; }\n\n\/* the page opens on green, never on grey (his point 1) *\/\n.bp-adv .bp-adv-rule {\n  height: 6px; border: 0; margin-block: 0; max-width: none;\n  background: linear-gradient(90deg, #005859 0%, #006B62 38%, #228A62 66%, #B7CB33 100%);\n}\n\n\/* --- section surfaces ------------------------------------------------------ *\/\n.bp-adv-sec { position: relative; background: var(--bp-white);\n  padding: var(--bp-s-8) var(--bp-side); margin-block: 0; }\n\/* the measure: every direct child of a section is the 760px text column *\/\n.bp-adv-sec > * { max-width: var(--bp-measure); margin-inline: auto; }\n.bp-adv-sec > *:last-child { margin-block-end: 0; }\n.bp-adv-sec--wash  { background: linear-gradient(180deg, #B7CB331F 0%, #B7CB3312 100%), #FFFFFF; }\n.bp-adv-sec--dark  { background: var(--bp-grad-dark); color: var(--bp-white); }\n.bp-adv-sec--dark p, .bp-adv-sec--dark cite, .bp-adv-sec--dark li { color: var(--bp-white); }\n.bp-adv-sec--offer { background: var(--bp-grad-lime); text-align: center; }\n.bp-adv-sec--hero  { padding-block-start: var(--bp-s-6); }\n.bp-adv-sec--disclosure { padding-block: var(--bp-s-6);\n  border-top: 1px solid var(--bp-sand); }\n\n\/* --- the side accent bar, his own example (\"a colour block on the left or the\n       right side of a section\"), design rev 3: a slim vertical bar hugging the\n       text column rather than a wide margin panel. Below 1100px the margin is\n       gone, so it becomes a slim top edge. ---------------------------------- *\/\n.bp-adv-rail { overflow: hidden; }\n.bp-adv-rail::before {\n  content: \"\"; position: absolute; top: var(--bp-s-7); bottom: var(--bp-s-7);\n  width: 6px; border-radius: 3px;\n  background: linear-gradient(180deg, var(--bp-forest) 0%, var(--bp-lime) 100%);\n}\n.bp-adv-rail--left::before  { left: calc((100% - var(--bp-measure)) \/ 2 - 34px); }\n.bp-adv-rail--right::before { right: calc((100% - var(--bp-measure)) \/ 2 - 34px); }\n@media (max-width: 1099px) {\n  .bp-adv-rail::before { left: 0; right: 0; width: auto; bottom: auto; top: 0;\n    height: 4px; border-radius: 0; background: var(--bp-lime); }\n}\n\n\/* --- CORE BLOCKS, styled by element. This is the part that makes an inserted\n       block come out on-design with no class. --------------------------------- *\/\n.bp-adv p { font-size: var(--bp-fs-body); line-height: var(--bp-lh-body);\n  margin-block: 0 var(--bp-s-5); }\n.bp-adv h1 { font-size: var(--bp-fs-h1); font-weight: 700; line-height: 1.22;\n  margin-block: 0 var(--bp-s-4); }\n\/* an H2 is its own colour band, so the page can be read from the headings\n   alone (his point 3). Dark green on light sections, light green on the dark\n   one, so a heading always wins against its own background. *\/\n.bp-adv h2 {\n  font-size: var(--bp-fs-h2); font-weight: 700; line-height: 1.28;\n  margin-block: 0 var(--bp-s-5);\n  background: var(--bp-grad-dark); color: var(--bp-white);\n  padding: var(--bp-s-4) var(--bp-s-5);\n  border-radius: var(--bp-radius-btn);\n  border-left: 6px solid var(--bp-lime);\n}\n.bp-adv-sec--dark h2 { background: var(--bp-lime); color: var(--bp-ink);\n  border-left-color: var(--bp-forest); }\n\/* H3: same background as its section, bigger font (his point 3, verbatim) *\/\n.bp-adv h3 { font-size: var(--bp-fs-h3); font-weight: 700; line-height: 1.35;\n  color: var(--bp-forest); background: transparent; margin-block: 0 var(--bp-s-3); }\n.bp-adv-sec--dark h3 { color: var(--bp-lime); }\n.bp-adv ul, .bp-adv ol { font-size: var(--bp-fs-body); line-height: var(--bp-lh-body);\n  margin-block: 0 var(--bp-s-5); padding-left: var(--bp-s-5); }\n.bp-adv li { margin-block-end: var(--bp-s-2); }\n.bp-adv a { color: var(--bp-teal); text-decoration: underline; }\n.bp-adv a:hover { color: var(--bp-olive); }\n.bp-adv-sec--dark a, .bp-adv-sec--dark strong { color: var(--bp-lime); }\n.bp-adv strong { font-weight: 700; }\n\/* the highlight pill. Colours ride on the inline style core writes, so only\n   the shape lives here and any <mark> in the article picks it up. *\/\n.bp-adv mark {\n  padding: 0 10px; border-radius: 10px; display: inline;\n  -webkit-box-decoration-break: clone; box-decoration-break: clone;\n}\n\/* figures match the approved page exactly: card radius plus the soft shadow,\n   and a left-aligned caption rather than core's centred one *\/\n.bp-adv .wp-block-image { margin-block: var(--bp-s-5); margin-inline: auto; }\n.bp-adv .wp-block-image img { display: block; width: 100%; height: auto;\n  border-radius: var(--bp-radius-card); box-shadow: var(--bp-shadow); }\n.bp-adv .wp-block-image figcaption { font-size: var(--bp-fs-foot); line-height: 1.55;\n  color: var(--bp-foot); text-align: left; margin-block: var(--bp-s-2) 0; }\n.bp-adv .wp-block-embed, .bp-adv .wp-block-video { margin-block: var(--bp-s-5); }\n.bp-adv .wp-block-embed iframe, .bp-adv .wp-block-video video {\n  width: 100%; border-radius: var(--bp-radius-photo); }\n.bp-adv .wp-block-separator:not(.bp-adv-rule) { border: 0; border-top: 1px solid var(--bp-sand);\n  margin-block: var(--bp-s-5); }\n\n\/* quotes: core pullquote and core quote both land on the lime rule. The\n   font-size reset undoes core's own 1.5em on the figure, which would otherwise\n   leak into anything inside the quote that has no size of its own. *\/\n\/* margin-inline is load bearing, and it must be `auto` rather than `0`.\n   `blockquote` and `figure` carry a 40px side margin in the browser's own\n   default stylesheet, which indents the quote inside its rule and makes the\n   copy wrap early on a phone. But these blocks are direct children of a\n   section, so zeroing the side margin also defeats the measure rule\n   `.bp-adv-sec > * { margin-inline: auto }` and pins them to the left edge. *\/\n.bp-adv .wp-block-pullquote, .bp-adv .wp-block-quote {\n  border: 0; border-left: 5px solid var(--bp-lime); background: transparent;\n  padding: var(--bp-s-2) 0 var(--bp-s-2) var(--bp-s-5);\n  margin-block: var(--bp-s-5); margin-inline: auto;\n  text-align: left; font-size: var(--bp-fs-body);\n}\n.bp-adv .wp-block-pullquote blockquote { border: 0; margin: 0; padding: 0; }\n.bp-adv .wp-block-pullquote p, .bp-adv .wp-block-quote p {\n  font-size: 24px; line-height: 1.45; font-weight: 600;\n  margin-block: 0 var(--bp-s-2); color: var(--bp-forest); }\n.bp-adv .wp-block-pullquote cite, .bp-adv .wp-block-quote cite {\n  display: block; margin: 0; font-size: var(--bp-fs-small); color: var(--bp-foot);\n  font-style: normal; text-transform: none; }\n\n\/* buttons: two classes so core's own .wp-block-button__link cannot win *\/\n.bp-adv .wp-block-buttons { display: flex; justify-content: center;\n  margin-block: 0 var(--bp-s-4); }\n.bp-adv .wp-block-button__link {\n  display: inline-flex; align-items: center; justify-content: center; min-height: 48px;\n  background: var(--bp-teal); color: var(--bp-white); font-size: var(--bp-fs-btn);\n  font-weight: 700; line-height: 1.2; border-radius: var(--bp-radius-btn);\n  padding: 15px 44px; text-decoration: none; transition: background 250ms ease;\n  box-shadow: var(--bp-shadow);\n}\n.bp-adv .wp-block-button__link:hover { background: var(--bp-olive); color: var(--bp-white); }\n\n\/* --- slot 1: pre-headline, headline, sub-headline (Jesse's headline skill) --- *\/\n.bp-adv .bp-adv-preheadline {\n  color: var(--bp-forest); font-size: var(--bp-fs-pre); font-weight: 600; line-height: 1.5;\n  border-left: 4px solid var(--bp-lime); padding-left: var(--bp-s-3);\n  margin-block: 0 var(--bp-s-4);\n}\n.bp-adv .bp-adv-subheadline { font-size: 21px; line-height: 1.5; font-weight: 600;\n  color: var(--bp-forest); margin-block: 0 var(--bp-s-5); }\n.bp-adv .bp-adv-standfirst { font-size: 19px; line-height: 1.65;\n  margin-block: 0 var(--bp-s-5); }\n.bp-adv .bp-adv-lede { font-size: 18px; line-height: 1.7;\n  margin-block: 0 var(--bp-s-5); }\n.bp-adv .bp-adv-byline { font-size: var(--bp-fs-small); color: var(--bp-foot);\n  line-height: 1.6; margin-block: 0 var(--bp-s-5); }\n.bp-adv .bp-adv-socialproof { font-size: var(--bp-fs-small); color: var(--bp-foot);\n  margin-block: 0 var(--bp-s-5); }\n\/* the offer headline above the CTA. Jesse asked for a second H1 here; the brand\n   doc's accessibility rule is one h1 per page, so it is rendered at H1 size and\n   stays an h2 element. Named in the close as the one design conflict. *\/\n.bp-adv h2.bp-adv-offerhead {\n  font-size: var(--bp-fs-h1); font-weight: 700; line-height: 1.22;\n  margin-block: 0 var(--bp-s-4); text-align: center; color: var(--bp-ink);\n  background: none; padding: 0; border: 0; border-radius: 0;\n}\n\n\/* --- Written by + Verified by. The avatar is the first child and spans the\n       three text rows, so the whole box is four ordinary paragraphs and stays\n       editable without nested columns. ---------------------------------------- *\/\n.bp-adv .bp-adv-authors {\n  background: var(--bp-white); border: 1px solid var(--bp-sand);\n  border-top: 4px solid var(--bp-lime); border-radius: var(--bp-radius-card);\n  box-shadow: var(--bp-shadow); padding: var(--bp-s-5);\n  margin-block: 0 var(--bp-s-4);\n  \/* auto-fit, so switching the verified box off leaves one full-width author\n     rather than a half-empty card *\/\n  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));\n  gap: var(--bp-s-5); align-items: start;\n}\n.bp-adv .bp-adv-author {\n  display: grid; grid-template-columns: 62px 1fr; gap: 0 var(--bp-s-3);\n  align-items: start; min-width: 0;\n}\n.bp-adv .bp-adv-avatar {\n  grid-row: 1 \/ span 3; width: 62px; height: 62px; border-radius: 50%;\n  background: #B7CB331F; border: 2px dashed var(--bp-olive);\n  display: flex; align-items: center; justify-content: center;\n  font-size: 10px; font-weight: 700; letter-spacing: 0.06em; color: var(--bp-forest);\n  margin-block: 0;\n}\n.bp-adv .bp-adv-author.is-placeholder .bp-adv-avatar {\n  border-color: var(--bp-sand); background: #fff; color: var(--bp-foot); }\n.bp-adv .bp-adv-author-role {\n  font-size: 11px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;\n  color: var(--bp-forest); line-height: 1.6; margin-block: 0; }\n.bp-adv .bp-adv-author.is-placeholder .bp-adv-author-role { color: var(--bp-foot); }\n.bp-adv .bp-adv-author-name { font-size: 17px; font-weight: 700; line-height: 1.35;\n  margin-block: 0; }\n.bp-adv .bp-adv-author-cred { font-size: var(--bp-fs-foot); color: var(--bp-foot);\n  line-height: 1.55; margin-block: 0; }\n\/* the optional wrapper must not break the two-column grid of the box *\/\n.bp-adv .bp-adv-authors > .bp-optional { display: contents; }\n.bp-adv .bp-adv-authors > .bp-optional.bp-off { display: none !important; }\n\n\/* --- placeholders: image slot, video slot ---------------------------------- *\/\n.bp-adv .bp-slot {\n  display: flex; align-items: center; justify-content: center; text-align: center;\n  min-height: 180px; padding: var(--bp-s-4); margin-block: var(--bp-s-5) 0;\n  border: 2px dashed var(--bp-olive); border-radius: var(--bp-radius-photo);\n  background: #B7CB331F; color: var(--bp-forest);\n}\n.bp-adv .bp-slot p { font-size: var(--bp-fs-small); font-weight: 700; margin-block: 0; }\n.bp-adv .bp-slot--video { min-height: 260px; }\n\n\/* --- mid-article CTA band --------------------------------------------------- *\/\n.bp-adv .bp-adv-midcta {\n  background: var(--bp-grad-lime); border: 1px solid var(--bp-lime);\n  border-radius: var(--bp-radius-card); padding: var(--bp-s-5) var(--bp-s-4);\n  margin-block: var(--bp-s-6); text-align: center;\n}\n.bp-adv .bp-adv-midcta .wp-block-buttons { margin-block-end: var(--bp-s-2); }\n.bp-adv .bp-adv-midcta .bp-adv-foot { margin-block: 0; }\n\n\/* the closing CTA is one named unit in List View, so it moves and toggles as a\n   whole. It carries no box of its own: the spacing must read exactly as it does\n   on the approved page, where the three parts are plain siblings. *\/\n.bp-adv .bp-adv-ctablock { margin-block: 0 var(--bp-s-5); }\n.bp-adv .bp-adv-ctablock .wp-block-buttons { margin-block-end: var(--bp-s-4); }\n.bp-adv .bp-adv-ctablock .bp-adv-foot { margin-block: 0; }\n\n\/* --- the condition, slot 8: the results page reference-card shape ----------- *\/\n.bp-adv .bp-adv-condition {\n  background: var(--bp-white); border: 1px solid var(--bp-sand);\n  border-left: 5px solid var(--bp-lime); border-radius: var(--bp-radius-btn);\n  padding: var(--bp-s-4) var(--bp-s-5); font-weight: 600; box-shadow: var(--bp-shadow);\n}\n\n\/* --- the numbers card: the results page focus panel, same gradient, same\n       radius, same lime figures (\"use more of that design\") ------------------ *\/\n.bp-adv .bp-adv-numcard {\n  background: linear-gradient(135deg, var(--bp-teal) 0%, var(--bp-forest) 100%);\n  border-radius: var(--bp-radius-card);\n  padding: var(--bp-s-6) var(--bp-s-5) var(--bp-s-5);\n  box-shadow: var(--bp-shadow); margin-block: var(--bp-s-5) 0;\n  position: relative; overflow: hidden;\n}\n.bp-adv .bp-adv-numcard::after {\n  content: \"\"; position: absolute; right: -70px; top: -70px; width: 240px; height: 240px;\n  border-radius: 50%; background: rgba(255,255,255,0.05); pointer-events: none;\n}\n.bp-adv .bp-adv-numcard .wp-block-columns {\n  position: relative; z-index: 1; gap: var(--bp-s-5); margin-block: 0; }\n.bp-adv .bp-adv-numcard .wp-block-column { min-width: 0; }\n.bp-adv .bp-adv-num-v { font-size: 44px; font-weight: 700; line-height: 1.12;\n  color: var(--bp-lime); text-align: center; margin-block: 0 var(--bp-s-2); }\n.bp-adv .bp-adv-num-l { font-size: var(--bp-fs-small); line-height: 1.5;\n  color: rgba(255,255,255,0.92); text-align: center; margin-block: 0; }\n.bp-adv .bp-adv-numsrc { margin-block: var(--bp-s-5) 0; }\n\n\/* --- the proof slot: a dashed card until a consented quote exists. The quote\n       inside loses its own vertical margins, otherwise the card is one full\n       block of spacing taller than the approved page. --------------------- *\/\n.bp-adv .bp-adv-testimonial {\n  border: 1px dashed var(--bp-sand); border-left: 5px dashed var(--bp-sand);\n  background: var(--bp-white); border-radius: var(--bp-radius-card);\n  padding: var(--bp-s-5); margin-block: var(--bp-s-5);\n}\n\/* the card IS the quote frame, so the quote inside it carries no rule and no\n   indent of its own; otherwise the copy is indented twice and wraps early *\/\n.bp-adv .bp-adv-testimonial .wp-block-quote {\n  border: 0; padding: 0; margin-block: 0; }\n.bp-adv .bp-adv-testimonial .wp-block-quote p {\n  font-size: 17px; font-weight: 500; color: var(--bp-foot); }\n\n\/* --- steps, footnotes, disclosure ------------------------------------------- *\/\n.bp-adv .bp-adv-steps {\n  max-width: 520px; margin-block: 0 var(--bp-s-5); margin-inline: auto;\n  padding-left: 0; list-style: none; counter-reset: bpstep; text-align: left;\n}\n.bp-adv .bp-adv-steps li { position: relative; padding-left: 40px;\n  margin-block-end: var(--bp-s-3); counter-increment: bpstep; }\n.bp-adv .bp-adv-steps li::before {\n  content: counter(bpstep); position: absolute; left: 0; top: 4px;\n  width: 26px; height: 26px; border-radius: 50%;\n  background: var(--bp-forest); color: var(--bp-white);\n  font-size: var(--bp-fs-small); font-weight: 700;\n  display: flex; align-items: center; justify-content: center; line-height: 1;\n}\n.bp-adv .bp-adv-foot { font-size: var(--bp-fs-foot); color: var(--bp-foot); line-height: 1.6; }\n.bp-adv-sec--dark .bp-adv-foot { color: rgba(255,255,255,0.82); }\n\/* Jesse's mandatory CTA subtext, 2026-07-30 15:59: directly under the button,\n   one notch above the microline in weight so it reads as part of the ask *\/\n.bp-adv .bp-adv-ctasub {\n  margin-block: calc(var(--bp-s-4) * -0.5) var(--bp-s-2); margin-inline: auto;\n  max-width: 460px; font-size: 15px; line-height: 1.5; font-weight: 600;\n  color: var(--bp-teal); text-align: center;\n}\n.bp-adv .bp-adv-disclosure { font-size: var(--bp-fs-foot); color: var(--bp-foot);\n  line-height: 1.6; }\n.bp-adv .bp-adv-sources { margin-block-start: var(--bp-s-5); }\n.bp-adv .bp-adv-srclist { font-size: var(--bp-fs-foot); color: var(--bp-foot);\n  line-height: 1.6; padding-left: 20px; margin-block: 0; }\n.bp-adv .bp-adv-srclist li { margin-block-end: var(--bp-s-1); }\n.bp-adv .bp-h--center { text-align: center; }\n\n@media (max-width: 767px) {\n  .bp-adv {\n    --bp-fs-h1: 30px; --bp-fs-h2: 24px; --bp-fs-h3: 20px; --bp-fs-body: 16px;\n    --bp-fs-btn: 16px; --bp-fs-pre: 14px; --bp-side: 20px;\n    --bp-s-8: 44px; --bp-s-7: 32px;\n  }\n  .bp-adv .bp-adv-subheadline { font-size: 18px; }\n  .bp-adv .bp-adv-standfirst { font-size: 17px; }\n  .bp-adv .bp-adv-lede { font-size: 16px; }\n  .bp-adv .wp-block-pullquote p, .bp-adv .wp-block-quote p { font-size: 20px; }\n  .bp-adv h2 { padding: var(--bp-s-3) var(--bp-s-4); }\n  .bp-adv .bp-adv-num-v { font-size: 36px; }\n  .bp-adv .bp-adv-authors { grid-template-columns: 1fr; gap: var(--bp-s-5); }\n  \/* the button is full width on mobile. 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A value that is too high can point to parathyroid glands that make too much PTH, or to a shortage of something like vitamin D. A value that is too low can point to parathyroid glands that cannot make enough PTH.<sup>[1]<\/sup><\/p>\n\n\n\n<p class=\"bp-adv-lede wp-block-paragraph\">On this page, you can read what parathyroid hormone is, what the guidelines say about a value that is too low or too high, what affects your value and which other values are best to look at alongside it.<\/p>\n\n\n\n<p class=\"bp-bm-names wp-block-paragraph\">Also known as: parathyroid hormone, parathormone, intact PTH. At the lab: PTH.<\/p>\n\n\n\n<p class=\"bp-adv-byline wp-block-paragraph\">Updated on 10 October 2026<\/p>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-adv-sec bp-adv-sec--wash is-layout-flow wp-block-group-is-layout-flow\">\n\n<div class=\"wp-block-group bp-bm-toc is-layout-flow wp-block-group-is-layout-flow\">\n\n<h2 class=\"wp-block-heading\" id=\"bp-inhoud\">On this page<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n\n<li><a href=\"#bp-in-het-kort\">In short<\/a><\/li>\n\n\n<li><a href=\"#bp-wat-is-pth\">What is parathyroid hormone?<\/a><\/li>\n\n\n<li><a href=\"#bp-waarom-het-ertoe-doet\">Why PTH matters<\/a><\/li>\n\n\n<li><a href=\"#bp-wat-je-waarde-zegt\">What your parathyroid hormone level tells you<\/a><\/li>\n\n\n<li><a href=\"#bp-wat-het-beinvloedt\">What affects your parathyroid hormone<\/a><\/li>\n\n\n<li><a href=\"#bp-welke-pakketten\">Which BioProfile packages measure parathyroid hormone<\/a><\/li>\n\n\n<li><a href=\"#bp-waarden-die-erbij-horen\">Related values<\/a><\/li>\n\n\n<li><a href=\"#bp-hoe-gemaakt\">How this page was made<\/a><\/li>\n\n\n<li><a href=\"#bp-bronnen\">Sources<\/a><\/li>\n\n<\/ul>\n\n<\/div>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-adv-sec is-layout-flow wp-block-group-is-layout-flow\">\n\n<h2 class=\"wp-block-heading\" id=\"bp-in-het-kort\">In short<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n\n<li>PTH is made by your parathyroid glands, four small glands in your neck.<sup>[1]<\/sup><\/li>\n\n\n<li>PTH controls how much calcium is in your blood.<sup>[1]<\/sup><\/li>\n\n\n<li>A high PTH can point to overactive parathyroid glands or to a problem outside them, such as a vitamin D deficiency.<sup>[1]<\/sup><\/li>\n\n\n<li>Your doctor usually reads PTH alongside a measurement of the calcium in your blood.<sup>[1]<\/sup><\/li>\n\n<\/ul>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-adv-sec bp-adv-sec--wash is-layout-flow wp-block-group-is-layout-flow\">\n\n<h2 class=\"wp-block-heading\" id=\"bp-wat-is-pth\">What is parathyroid hormone?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Parathyroid hormone, PTH for short, is made by your parathyroid glands. These are four glands the size of a pea, in your neck. Hormones are chemical messengers in your blood. They control certain cells or organs.<sup>[1]<\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PTH controls the calcium in your blood. Most of your calcium is in your bones and teeth. Having the right amount of calcium in your blood matters for your nerves, your muscles and your heart.<sup>[1]<\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If your calcium is too low, your parathyroid glands release PTH. Your bones then release calcium into your blood, your gut absorbs more calcium from your food and your kidneys hold on to calcium instead of losing it through your urine. Once your calcium is back to normal, the glands stop and your PTH falls. PTH also helps regulate the amount of phosphate in your blood.<sup>[1]<\/sup><\/p>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-adv-sec is-layout-flow wp-block-group-is-layout-flow\">\n\n<h2 class=\"wp-block-heading\" id=\"bp-waarom-het-ertoe-doet\">Why PTH matters<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A PTH test mostly helps work out whether the parathyroid glands are the cause of an abnormal calcium level. Doctors also use the test to explain a low phosphate level, to monitor people with a long-term kidney condition and to look for the cause of severely weakened bones that break easily.<sup>[1]<\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A PTH test can be useful if an earlier calcium measurement was not normal, or if you have symptoms that fit too much calcium. Think of constipation, nausea, stomach pain, a lot of thirst, needing to pee more often, tiredness or confusion.<sup>[1]<\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Symptoms that fit too little calcium can also be a reason. Think of muscle cramps, tingling in your lips, tongue, fingers and feet, or an irregular heartbeat.<sup>[1]<\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In 2022, an international group of more than 50 experts published new guidelines on investigating overactive parathyroid glands. Compared with the 2014 guidelines, it is mainly the recommendations about the kidneys that were revised.<sup>[2]<\/sup><\/p>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-adv-sec bp-adv-sec--wash is-layout-flow wp-block-group-is-layout-flow\">\n\n<h2 class=\"wp-block-heading\" id=\"bp-wat-je-waarde-zegt\">What your parathyroid hormone value tells you<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">The lab's reference range<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Labplusarts, the lab BioProfile works with, uses a reference range of 1.6 to 6.9 pmol\/l for parathyroid hormone. The lab calls a level between those limits normal.<sup>[3]<\/sup><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What MedlinePlus says<\/h3>\n\n\n\n<figure class=\"wp-block-table bp-bm-table\"><table><thead><tr><th>Your PTH level<\/th><th>What it can mean<\/th><th>Who it is for<\/th><\/tr><\/thead><tbody><tr><td>Higher than normal<sup>[1]<\/sup><\/td><td>Can point to parathyroid glands that themselves make too much PTH<\/td><td>If your calcium is also high<\/td><\/tr><tr><td>Higher than normal<sup>[1]<\/sup><\/td><td>Can point to parathyroid glands that work well and make extra PTH, while the cause lies outside the glands<\/td><td>If your calcium is low<\/td><\/tr><tr><td>Lower than normal<sup>[1]<\/sup><\/td><td>Can point to parathyroid glands that cannot make enough PTH<\/td><td>If your calcium is also low<\/td><\/tr><tr><td>Doesn't match your calcium<sup>[1]<\/sup><\/td><td>Your doctor will usually request further blood tests<\/td><td>When PTH doesn't fit your calcium and other results<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"bp-bm-caption wp-block-paragraph\">Source: MedlinePlus, U.S. National Library of Medicine. Applies to PTH read alongside your blood calcium, not as a value on its own.<sup>[1]<\/sup><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Parathyroid hormone too low<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A low PTH together with a low calcium can point to parathyroid glands that cannot make enough PTH. This is less common than a PTH that is too high. Possible causes include damage to the glands after surgery on your neck or after radiation therapy, certain autoimmune conditions, certain inherited conditions, too much vitamin D or calcium from supplements or from antacids containing calcium, and serious illness.<sup>[1]<\/sup><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Parathyroid hormone too high<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A high PTH together with a high calcium can point to a problem in the parathyroid glands themselves, which makes them produce too much PTH. A high PTH together with a low calcium can point to glands that work well and make extra PTH to bring your calcium up. The cause then often lies outside them, such as a shortage of vitamin D, phosphate or magnesium, too little calcium, difficulty absorbing calcium from your food, or kidneys that are not doing their job properly. Your doctor will then usually request further tests.<sup>[1]<\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">BioProfile is working on its own zones for each value, from risk to optimal. A doctor reviews those zones before they appear in your result.<\/p>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-adv-sec is-layout-flow wp-block-group-is-layout-flow\">\n\n<h2 class=\"wp-block-heading\" id=\"bp-wat-het-beinvloedt\">What affects your parathyroid hormone<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Calcium in your blood<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Your PTH moves with your calcium. If your calcium falls, your parathyroid glands make more PTH. Once your calcium is back to normal, your PTH falls.<sup>[1]<\/sup><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Deficiencies and absorption<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A shortage of vitamin D, phosphate or magnesium, too little calcium from your food, a digestive condition that makes it harder to absorb calcium, or kidneys that lose too much calcium through your urine can go together with a higher PTH.<sup>[1]<\/sup><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Supplements and antacids<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Too much vitamin D or calcium from supplements, or from antacids that contain calcium, can go together with a low PTH.<sup>[1]<\/sup><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Fasting and time of day<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">You usually don't need to prepare for a PTH test. Sometimes a doctor will ask you to come in fasting or to have the test done at a certain time of day.<sup>[1]<\/sup><\/p>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-adv-sec bp-adv-sec--wash is-layout-flow wp-block-group-is-layout-flow\">\n\n<h2 class=\"wp-block-heading\" id=\"bp-welke-pakketten\">Which BioProfile packages measure parathyroid hormone<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Parathyroid hormone is included in BioProfile 150.<sup>[4]<\/sup><\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-3e41869c wp-block-buttons-is-layout-flex\">\n\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/bioprofile.com\/en\/blood-testing\/\">View the packages<\/a><\/div>\n\n<\/div>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-adv-sec is-layout-flow wp-block-group-is-layout-flow\">\n\n<h2 class=\"wp-block-heading\" id=\"bp-waarden-die-erbij-horen\">Values that go with it<\/h2>\n\n\n\n<ul class=\"wp-block-list bp-bm-related\">\n\n<li><a href=\"https:\/\/bioprofile.com\/en\/biomarkers\/alkaline-phosphatase\/\">ALP<\/a>: an extra result alongside PTH, because a doctor reads PTH together with other tests, especially calcium.<sup>[1]<\/sup><\/li>\n\n\n<li><a href=\"https:\/\/bioprofile.com\/en\/biomarkers\/progesterone\/\">Progesterone<\/a>: a different hormone in your blood. Each hormone directs certain cells or organs, and PTH mainly directs your calcium.<sup>[1]<\/sup><\/li>\n\n\n<li><a href=\"https:\/\/bioprofile.com\/en\/biomarkers\/vitamin-d\/\">Vitamin D (25-OH)<\/a>: a deficiency can go together with a high PTH and a low calcium, and too much vitamin D from supplements with a low PTH.<sup>[1]<\/sup><\/li>\n\n\n<li><a href=\"https:\/\/bioprofile.com\/en\/biomarkers\/dhea-s\/\">DHEA-S<\/a>: another hormone that acts as a chemical messenger in your blood, alongside PTH, which regulates your calcium.<sup>[1]<\/sup><\/li>\n\n\n<li><a href=\"https:\/\/bioprofile.com\/en\/biomarkers\/prolactin\/\">Prolactin<\/a>: a hormone that directs different cells or organs from PTH, which mainly regulates your calcium and phosphate.<sup>[1]<\/sup><\/li>\n\n<\/ul>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-adv-sec bp-adv-sec--wash is-layout-flow wp-block-group-is-layout-flow\">\n\n<h2 class=\"wp-block-heading\" id=\"bp-hoe-gemaakt\">How this page was made<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The BioProfile editorial team wrote this page on 10 October 2026 from the sources below, which we read on 10 October 2026. Every number on this page appears in one of those sources, with that source's number next to it. An expert has yet to check this page; after that check, the expert's name and the date of the check will appear at the top. This page offers explanation, not a diagnosis. Discuss a value outside the range with your GP.<\/p>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-adv-sec bp-adv-sec--disclosure is-layout-flow wp-block-group-is-layout-flow\">\n\n<h2 class=\"wp-block-heading\" id=\"bp-bronnen\">Sources<\/h2>\n\n\n\n<ol class=\"wp-block-list bp-adv-srclist bp-bm-src\">\n\n<li>MedlinePlus, U.S. National Library of Medicine. Parathyroid Hormone (PTH) Test. Accessed 10 October 2026. <a href=\"https:\/\/medlineplus.gov\/lab-tests\/parathyroid-hormone-pth-test\/\" target=\"_blank\" rel=\"noopener\">https:\/\/medlineplus.gov\/lab-tests\/parathyroid-hormone-pth-test\/<\/a><\/li>\n\n\n<li>Bilezikian JP, Khan AA, Silverberg SJ, et al. Evaluation and Management of Primary Hyperparathyroidism: Summary Statement and Guidelines from the Fifth International Workshop. J Bone Miner Res. 2022;37(11):2293-2314. <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/36245251\/\" target=\"_blank\" rel=\"noopener\">https:\/\/pubmed.ncbi.nlm.nih.gov\/36245251\/<\/a><\/li>\n\n\n<li>Labplusarts, the laboratory BioProfile works with: reference range for the parathyroid hormone (PTH) test, 1.6 to 6.9 pmol\/l. List dated 24 September 2026.<\/li>\n\n\n<li>BioProfile, the blood test packages and the values in each package. <a href=\"https:\/\/bioprofile.com\/en\/blood-testing\/\" target=\"_blank\" rel=\"noopener\">https:\/\/bioprofile.com\/en\/blood-testing\/<\/a><\/li>\n\n<\/ol>\n\n<\/div>\n\n<\/section>\n\n","protected":false},"excerpt":{"rendered":"<p>Home \u203a Biomarkers \u203a Parathyroid hormone Parathyroid hormone (PTH) Parathyroid hormone (PTH) is a hormone that controls the amount of calcium in your blood. A value that is too high can point to parathyroid glands that make too much PTH, or to a shortage of something like vitamin D. A value that is too low [&hellip;]<\/p>\n","protected":false},"author":18,"featured_media":0,"parent":6592,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"_yoast_wpseo_title":"Parathyroid hormone (PTH): what your level tells you | BioProfile","_yoast_wpseo_metadesc":"Parathyroid hormone (PTH) regulates the calcium in your blood. 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