{"id":15323,"date":"2026-10-14T15:00:00","date_gmt":"2026-10-14T15:00:00","guid":{"rendered":"https:\/\/bioprofile.com\/?page_id=15323"},"modified":"2026-11-06T03:06:08","modified_gmt":"2026-11-06T03:06:08","slug":"vitamina-b12","status":"publish","type":"page","link":"https:\/\/bioprofile.com\/es\/biomarkers\/vitamina-b12\/","title":{"rendered":"Vitamina B12"},"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. 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En el laboratorio: VB12.<\/p>\n\n\n\n<p class=\"bp-adv-byline wp-block-paragraph\">Actualizado el 2 de octubre de 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\">En esta p\u00e1gina<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n\n<li><a href=\"#bp-in-het-kort\">En resumen<\/a><\/li>\n\n\n<li><a href=\"#bp-wat-is-vitamine-b12\">\u00bfQu\u00e9 es la vitamina B12?<\/a><\/li>\n\n\n<li><a href=\"#bp-waarom-het-ertoe-doet\">Por qu\u00e9 importa esta vitamina<\/a><\/li>\n\n\n<li><a href=\"#bp-wat-je-waarde-zegt\">Qu\u00e9 dice tu valor de vitamina B12<\/a><\/li>\n\n\n<li><a href=\"#bp-wat-het-beinvloedt\">Qu\u00e9 influye en tu vitamina B12<\/a><\/li>\n\n\n<li><a href=\"#bp-welke-pakketten\">Qu\u00e9 paquetes de BioProfile miden la vitamina B12<\/a><\/li>\n\n\n<li><a href=\"#bp-waarden-die-erbij-horen\">Valores relacionados<\/a><\/li>\n\n\n<li><a href=\"#bp-hoe-gemaakt\">C\u00f3mo se ha hecho esta p\u00e1gina<\/a><\/li>\n\n\n<li><a href=\"#bp-bronnen\">Fuentes<\/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\">En resumen<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n\n<li>Un d\u00e9ficit de vitamina B12 puede causar s\u00edntomas como cansancio, palpitaciones o p\u00e9rdida de memoria.<sup>[2]<\/sup><\/li>\n\n\n<li>Un d\u00e9ficit es poco frecuente, pero un nivel demasiado bajo se ve a menudo en grupos que comen pocos productos de origen animal.<sup>[2, 3]<\/sup><\/li>\n\n\n<li>Seg\u00fan un estudio dan\u00e9s, un valor alto puede indicar una enfermedad grave oculta.<sup>[1]<\/sup><\/li>\n\n\n<li>Seg\u00fan el Voedingscentrum, mucha gente no necesita un suplemento, pero a las personas veganas s\u00ed se les aconseja tomar uno.<sup>[2]<\/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-vitamine-b12\">\u00bfQu\u00e9 es la vitamina B12?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La vitamina B12 es una vitamina que tu cuerpo necesita para fabricar gl\u00f3bulos rojos. Los gl\u00f3bulos rojos transportan el ox\u00edgeno por tu sangre. La vitamina B12 tambi\u00e9n es importante para que tu sistema nervioso funcione bien. La obtienes a trav\u00e9s de productos de origen animal, como la leche, la carne, el pescado y los huevos.<sup>[2, 3]<\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tu cuerpo guarda la vitamina B12 como reserva, sobre todo en el h\u00edgado. Un d\u00e9ficit puede provocar un tipo de anemia, que puede hacer que te sientas, por ejemplo, cansado o mareado. Un d\u00e9ficit tambi\u00e9n puede afectar a tus nervios, con hormigueo en los dedos, por ejemplo. Como tu cuerpo gasta primero la reserva, a menudo no notas un d\u00e9ficit hasta pasados unos meses o incluso un a\u00f1o.<sup>[2, 3]<\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">El laboratorio mide la vitamina B12 en tu sangre. Una medici\u00f3n as\u00ed en la sangre puede mostrar si tienes poca vitamina B12. Seg\u00fan los estudios, la falta de vitamina B12 se ve a menudo en personas que comen pocos productos de origen animal. Por tanto, un valor bajo puede indicar un d\u00e9ficit.<sup>[2, 3]<\/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\">Por qu\u00e9 importa esta vitamina<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La vitamina B12 es la \u00fanica vitamina hidrosoluble que tu cuerpo guarda como reserva. Se trata de unos 2 a 5 miligramos. En parte por eso, un d\u00e9ficit es poco frecuente.<sup>[2]<\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Durante mucho tiempo, la atenci\u00f3n se centr\u00f3 sobre todo en los s\u00edntomas claros por d\u00e9ficit. Seg\u00fan una revisi\u00f3n de expertos, ahora se presta m\u00e1s atenci\u00f3n a un nivel demasiado bajo en grupos que comen pocos productos de origen animal. Ese nivel se puede ver con un valor en sangre. Qu\u00e9 consecuencias tiene un nivel tan bajo es algo que a\u00fan hay que investigar.<sup>[3]<\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Seg\u00fan el Voedingscentrum, los adultos de 18 a\u00f1os o m\u00e1s necesitan 2,8 microgramos de vitamina B12 al d\u00eda. Durante el embarazo, son 3,3 microgramos. Si tomas algo menos, no tienes un d\u00e9ficit enseguida. Para la mayor\u00eda de las personas, la recomendaci\u00f3n es m\u00e1s alta de lo que de verdad necesitan.<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\">Lo que dice tu valor de vitamina B12<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">La directriz del laboratorio<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Labplusarts, el laboratorio con el que trabaja BioProfile, utiliza para la vitamina B12 un valor de referencia de 148 a 584 pmol\/l. El laboratorio considera normal un valor entre estos l\u00edmites.<sup>[4]<\/sup><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">El estudio de Arendt y colegas<\/h3>\n\n\n\n<figure class=\"wp-block-table bp-bm-table\"><table><thead><tr><th>Valor<\/th><th>Qu\u00e9 puede significar<\/th><th>Para qui\u00e9n<\/th><\/tr><\/thead><tbody><tr><td>200 a 600 pmol\/l<sup>[1]<\/sup><\/td><td>El rango de referencia para la poblaci\u00f3n, usado en el estudio como comparaci\u00f3n<\/td><td>La poblaci\u00f3n, como referencia en el estudio<\/td><\/tr><tr><td>601 a 800 pmol\/l<sup>[1]<\/sup><\/td><td>Por encima del rango de referencia; en este grupo, la probabilidad de un co\u00e1gulo en una vena era mayor<\/td><td>Personas con una enfermedad grave, con el valor medido antes de que se diagnosticara<\/td><\/tr><tr><td>M\u00e1s de 800 pmol\/l<sup>[1]<\/sup><\/td><td>Por encima del rango de referencia; tambi\u00e9n en este grupo, la probabilidad de un co\u00e1gulo en una vena era mayor<\/td><td>Personas con una enfermedad grave, con el valor medido antes de que se diagnosticara<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"bp-bm-caption wp-block-paragraph\">Fuente: Arendt y colegas, Thrombosis Research. Un estudio poblacional dan\u00e9s en personas con una enfermedad grave, a las que se les hab\u00eda medido la vitamina B12 antes de que se diagnosticara esa enfermedad. Estos l\u00edmites se aplican a ese estudio.<sup>[1]<\/sup><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Vitamina B12 demasiado baja<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Un valor demasiado bajo puede indicar un d\u00e9ficit. Seg\u00fan el Voedingscentrum, un d\u00e9ficit provoca un tipo de anemia llamado anemia macroc\u00edtica. Por eso, adem\u00e1s de cansancio y mareos, tambi\u00e9n puedes notar palpitaciones o zumbidos en los o\u00eddos. Un d\u00e9ficit tambi\u00e9n puede causar p\u00e9rdida de memoria, problemas de coordinaci\u00f3n y debilidad muscular en las piernas.<sup>[2]<\/sup><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Vitamina B12 demasiado alta<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Seg\u00fan un estudio dan\u00e9s, un valor alto en sangre puede indicar una enfermedad grave oculta. En ese estudio, las personas con un valor m\u00e1s alto tambi\u00e9n ten\u00edan m\u00e1s probabilidades de sufrir un co\u00e1gulo de sangre en una vena. Seg\u00fan los investigadores, todav\u00eda hay que estudiar m\u00e1s qu\u00e9 significa esto en la pr\u00e1ctica.<sup>[1]<\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">BioProfile est\u00e1 trabajando en sus propias zonas para cada valor, de riesgo a \u00f3ptimo. Un m\u00e9dico valora esas zonas antes de que aparezcan en tu resultado.<\/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\">Qu\u00e9 influye en tu vitamina B12<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Lo que comes<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">La vitamina B12 est\u00e1 casi solo en productos de origen animal, porque la fabrican las bacterias del tubo digestivo de los animales. Un trozo de salm\u00f3n cocinado de 100 gramos contiene 4,0 microgramos; un huevo de 50 gramos, 0,8 microgramos. Las algas secas tambi\u00e9n contienen vitamina B12, pero sobre todo en una forma que no es activa y que tu cuerpo no absorbe bien.<sup>[2]<\/sup><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Comer sin productos de origen animal<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Si no comes productos de origen animal, puede aparecer un d\u00e9ficit. Seg\u00fan una revisi\u00f3n de expertos, los s\u00edntomas claros por d\u00e9ficit se deben sobre todo a un tipo concreto de anemia o a una alimentaci\u00f3n vegetariana estricta. Para las personas veganas, el Voedingscentrum aconseja productos con vitamina B12 a\u00f1adida y, adem\u00e1s, un suplemento.<sup>[2, 3]<\/sup><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00f3mo la absorbe tu cuerpo<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">En los alimentos, la vitamina B12 va unida a una prote\u00edna. El \u00e1cido del est\u00f3mago la separa de ella. En el intestino delgado se une a otra prote\u00edna que viene del est\u00f3mago, el Intrinsic Factor. Esa uni\u00f3n es necesaria para absorberla. Probablemente tu cuerpo absorbe entre un 40 y un 50% de la vitamina B12 que tomas.<sup>[2]<\/sup><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Suplementos<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Seg\u00fan el Voedingscentrum, mucha gente no necesita un suplemento de vitamina B12; no aporta ning\u00fan beneficio extra para la salud. Si aun as\u00ed quieres tomar uno, el consejo para adultos es no pasar de 2,8 microgramos al d\u00eda a trav\u00e9s de un suplemento. Si tomas toda la vitamina B12 a la vez, tu cuerpo la absorbe de forma menos eficiente.<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-welke-pakketten\">Qu\u00e9 paquetes de BioProfile miden la vitamina B12<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La vitamina B12 est\u00e1 incluida en BioProfile 121 y 150.<sup>[5]<\/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\/es\/analisis-de-sangre\/\">Ver los paquetes<\/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\">Valores que la acompa\u00f1an<\/h2>\n\n\n\n<ul class=\"wp-block-list bp-bm-related\">\n\n<li><a href=\"https:\/\/bioprofile.com\/es\/biomarkers\/hemoglobina\/\">Hemoglobina<\/a>: ayuda a detectar la anemia, y un d\u00e9ficit de vitamina B12 puede provocar un tipo de anemia.<sup>[2]<\/sup><\/li>\n\n\n<li><a href=\"https:\/\/bioprofile.com\/es\/biomarkers\/leucocitos\/\">Leucocitos<\/a>: completan la imagen de tu sangre junto a los valores de tus gl\u00f3bulos rojos.<\/li>\n\n\n<li><a href=\"https:\/\/bioprofile.com\/es\/biomarkers\/eritrocitos\/\">Eritrocitos<\/a>: son tus gl\u00f3bulos rojos, y para producirlos se necesita vitamina B12.<sup>[2]<\/sup><\/li>\n\n\n<li><a href=\"https:\/\/bioprofile.com\/es\/biomarkers\/trombocitos\/\">Trombocitos<\/a>: junto con las dem\u00e1s c\u00e9lulas de la sangre, completan el hemograma completo.<\/li>\n\n\n<li><a href=\"https:\/\/bioprofile.com\/es\/biomarkers\/hematocrito\/\">Hematocrito<\/a>: forma parte de los valores de tus gl\u00f3bulos rojos y por eso encaja en la misma imagen.<\/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\">C\u00f3mo se ha hecho esta p\u00e1gina<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La redacci\u00f3n de BioProfile escribi\u00f3 esta p\u00e1gina el 2 de octubre de 2026 a partir de las fuentes que aparecen abajo, que le\u00edmos el 2 de octubre de 2026. Cada cifra de esta p\u00e1gina aparece en una de esas fuentes, con el n\u00famero de esa fuente al lado. Una persona experta todav\u00eda revisar\u00e1 esta p\u00e1gina; tras esa revisi\u00f3n, su nombre y la fecha de la revisi\u00f3n aparecer\u00e1n arriba del todo. Esta p\u00e1gina ofrece una explicaci\u00f3n, no un diagn\u00f3stico. Comenta cualquier valor alterado con tu m\u00e9dico de cabecera.<\/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\">Fuentes<\/h2>\n\n\n\n<ol class=\"wp-block-list bp-adv-srclist bp-bm-src\">\n\n<li>Arendt JFH, Farkas DK, Pedersen L, et al. Elevated plasma vitamin B12 levels and risk of venous thromboembolism among cancer patients: A population-based cohort study. Thromb Res. 2017;156:177-183. <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/28667844\/\" target=\"_blank\" rel=\"noopener\">https:\/\/pubmed.ncbi.nlm.nih.gov\/28667844\/<\/a><\/li>\n\n\n<li>Voedingscentrum. Vitamine B12. Consultado el 12 de octubre de 2026. <a href=\"https:\/\/www.voedingscentrum.nl\/encyclopedie\/vitamine-b12.aspx\" target=\"_blank\" rel=\"noopener\">https:\/\/www.voedingscentrum.nl\/encyclopedie\/vitamine-b12.aspx<\/a><\/li>\n\n\n<li>Allen LH, Miller JW, de Groot L, et al. Biomarkers of Nutrition for Development (BOND): Vitamin B-12 Review. J Nutr. 2018;148(suppl_4):1995S-2027S. <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/30500928\/\" target=\"_blank\" rel=\"noopener\">https:\/\/pubmed.ncbi.nlm.nih.gov\/30500928\/<\/a><\/li>\n\n\n<li>Labplusarts, el laboratorio con el que trabaja BioProfile: valor de referencia en la determinaci\u00f3n de vitamina b12 (VB12), 148 a 584 pmol\/l. Lista del 24 de septiembre de 2026.<\/li>\n\n\n<li>BioProfile, los paquetes del an\u00e1lisis de sangre y los valores de cada paquete. <a href=\"https:\/\/bioprofile.com\/es\/analisis-de-sangre\/\" target=\"_blank\" rel=\"noopener\">https:\/\/bioprofile.com\/es\/analisis-de-sangre\/<\/a><\/li>\n\n<\/ol>\n\n<\/div>\n\n<\/section>\n\n","protected":false},"excerpt":{"rendered":"<p>Inicio \u203a Biomarcadores \u203a Vitamina B12 Vitamina B12: lo que dice tu valor En un gran estudio dan\u00e9s, un valor de vitamina B12 de 200 a 600 pmol\/l se consider\u00f3 el rango de referencia para la poblaci\u00f3n.[1] En esta p\u00e1gina descubrir\u00e1s qu\u00e9 es la vitamina B12, qu\u00e9 dicen las pautas sobre un valor demasiado bajo [&hellip;]<\/p>\n","protected":false},"author":18,"featured_media":0,"parent":6604,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"_yoast_wpseo_title":"Vitamina B12: qu\u00e9 dice tu valor | BioProfile","_yoast_wpseo_metadesc":"Qu\u00e9 hace la vitamina B12, qu\u00e9 puede indicar un valor demasiado bajo o demasiado alto y qu\u00e9 influye en tu valor. 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