{"id":8000,"date":"2026-10-06T14:31:00","date_gmt":"2026-10-06T14:31:00","guid":{"rendered":"https:\/\/bioprofile.com\/?p=8000"},"modified":"2026-10-06T14:36:32","modified_gmt":"2026-10-06T14:36:32","slug":"what-is-vitamin-c-good-for","status":"publish","type":"post","link":"https:\/\/bioprofile.com\/en\/what-is-vitamin-c-good-for\/","title":{"rendered":"What is vitamin C good for? What the studies show, how much you need and when extra becomes too much"},"content":{"rendered":"\n<article class=\"wp-block-group bp-blog is-layout-flow wp-block-group-is-layout-flow\">\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n<link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\n<link rel=\"stylesheet\" href=\"https:\/\/fonts.googleapis.com\/css2?family=Poppins:wght@300;400;500;600;700&#038;display=swap\">\n<style id=\"bp-blog-design\">\n.bp-blog {\n  --bp-ink: #212527; --bp-teal: #005859; --bp-teal-deep: #006B62; --bp-emerald: #228A62;\n  --bp-green: #7CA74D; --bp-lime: #B7CB33; --bp-lime-soft: #B7CB3329; --bp-green-aa: #4F6B28;\n  --bp-beige: #EDEAE5; --bp-sand: #DBD4CB; --bp-pale-teal: #D9E6E6; --bp-white: #FFFFFF;\n  --bp-foot: #6b6b6b;\n  --bp-font: 'Poppins','Segoe UI',Arial,sans-serif;\n  --bp-fs-h1: 40px; --bp-fs-h2: 29px; --bp-fs-h3: 21px; --bp-fs-body: 17px;\n  --bp-fs-lead: 19px; --bp-fs-small: 14px; --bp-fs-foot: 13px; --bp-fs-btn: 17px;\n  --bp-lh-body: 1.75;\n  --bp-s-2: 8px; --bp-s-3: 12px; --bp-s-4: 16px; --bp-s-5: 24px; --bp-s-6: 32px;\n  --bp-s-7: 44px; --bp-s-8: 72px;\n  --bp-measure: 875px; --bp-prose: 875px; --bp-side: 40px; --bp-portrait: 132px;\n  --bp-radius-card: 20px; --bp-radius-btn: 10px; --bp-radius-chip: 999px;\n  --bp-shadow: 0 10px 30px rgba(0,88,89,0.10); --bp-shadow-soft: 0 2px 10px rgba(0,88,89,0.06);\n  font-family: var(--bp-font); font-size: var(--bp-fs-body); line-height: var(--bp-lh-body);\n  color: var(--bp-ink); background: var(--bp-white); -webkit-font-smoothing: antialiased;\n}\n.bp-blog, .bp-blog * { box-sizing: border-box; }\n.bp-blog p, .bp-blog li, .bp-blog h1, .bp-blog h2, .bp-blog h3, .bp-blog a, .bp-blog td,\n.bp-blog th, .bp-blog cite { overflow-wrap: break-word; min-width: 0; }\n.bp-blog h1, .bp-blog h2, .bp-blog h3 { text-wrap: balance; }\n.bp-blog p, .bp-blog li { text-wrap: pretty; }\n\/* WordPress core's flow layout puts 24px above every child after the first; inside\n   a grid or a flex row that is a misalignment (measured on the scan pages 2026-08-21) *\/\n.bp-blog .bp-blog-author > *, .bp-blog .bp-blog-related > *, .bp-blog .bp-blog-verify > * { margin-block: 0; }\n\n\/* --- sections: one column, the article measure, the section rhythm ------------ *\/\n.bp-blog-sec { position: relative; background: var(--bp-white); margin-block: 0;\n  padding-block: var(--bp-s-7);\n  padding-inline: max(var(--bp-side), calc((100% - var(--bp-measure)) \/ 2)); }\n.bp-blog-sec > *:last-child { margin-block-end: 0; }\n.bp-blog-sec > p, .bp-blog-sec > ul, .bp-blog-sec > ol, .bp-blog-sec > .wp-block-quote,\n.bp-blog-sec > .bp-blog-faq-item, .bp-blog-sec > .bp-blog-takeaways, .bp-blog-sec > .bp-blog-toc,\n.bp-blog-sec > .bp-blog-refs, .bp-blog-sec > .bp-blog-srclead { max-width: var(--bp-prose); }\n.bp-blog-sec--head { padding-block: var(--bp-s-7) 0; }\n.bp-blog-sec--body { padding-block: var(--bp-s-6) var(--bp-s-7); }\n.bp-blog-sec--beige { background: var(--bp-beige); }\n.bp-blog-sec--wash { background: linear-gradient(180deg, #B7CB331A 0%, #B7CB330D 100%), #FFFFFF; }\n.bp-blog-sec--tight { padding-block: var(--bp-s-6); }\n\/* A COLOURED SECTION IS A PANEL, so it carries the panel radius. 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Wat de studies laten zien, hoeveel je nodig hebt en wanneer extra te veel wordt\",\n      \"description\": \"Waar is vitamine C goed voor: wat de vitamine doet, hoeveel je nodig hebt, wat studies tonen over verkoudheid, hart en diabetes, en wanneer extra te veel is.\",\n      \"inLanguage\": \"nl-NL\",\n      \"author\": {\n        \"@type\": \"Person\",\n        \"name\": \"Jesse van der Velde\",\n        \"jobTitle\": \"Oprichter van BioProfile\",\n        \"url\": \"https:\/\/nl.linkedin.com\/in\/jessevdv\",\n        \"image\": \"https:\/\/bioprofile.com\/wp-content\/uploads\/2026\/07\/author-jesse-round-320.jpg\"\n      },\n      \"publisher\": {\n        \"@type\": \"Organization\",\n        \"name\": \"BioProfile\",\n        \"url\": \"https:\/\/bioprofile.com\/\",\n        \"logo\": {\n          \"@type\": \"ImageObject\",\n          \"url\": \"https:\/\/bioprofile.com\/wp-content\/uploads\/2024\/08\/logo.svg\"\n        }\n      },\n      \"datePublished\": \"2026-10-06\",\n      \"dateModified\": \"2026-10-06\",\n      \"articleSection\": \"Gezond ouder worden\",\n      \"wordCount\": 1692,\n      \"about\": {\n        \"@type\": \"Thing\",\n        \"name\": \"Gezond ouder worden\"\n      },\n      \"citation\": [\n        {\n          \"@type\": \"CreativeWork\",\n          \"name\": \"Voedingscentrum. 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Wat de studies laten zien, hoeveel je nodig hebt en wanneer extra te veel wordt\"\n          }\n        }\n      ]\n    }\n  ]\n}\n<\/script>\n\n\n\n<div class=\"wp-block-group bp-blog-sec bp-blog-sec--head is-layout-flow wp-block-group-is-layout-flow\">\n\n<p class=\"bp-blog-eyebrow wp-block-paragraph\"><a href=\"https:\/\/bioprofile.com\/en\/category\/healthy-aging-en\/\">Healthy ageing<\/a><\/p>\n\n\n\n<p class=\"bp-blog-meta wp-block-paragraph\">By Jesse van der Velde \u00b7 Published on 6 October 2026 \u00b7 Last updated on 6 October 2026 \u00b7 Reading time about 9 minutes<\/p>\n\n\n\n<figure class=\"wp-block-image size-large bp-blog-hero\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"630\" src=\"https:\/\/bioprofile.com\/wp-content\/uploads\/2026\/10\/bp-blog-waar-is-vitamine-c-goed-voor-8329425a.webp\" alt=\"The first two questions of the BioProfile lifestyle scan, about olive oil and daily vegetables and about fish and pulses, each with three possible answers. If you are wondering what vitamin C is good for, this shows how the scan asks about vegetables in your daily diet.\" class=\"wp-image-7736\" srcset=\"https:\/\/bioprofile.com\/wp-content\/uploads\/2026\/10\/bp-blog-waar-is-vitamine-c-goed-voor-8329425a.webp 1200w, https:\/\/bioprofile.com\/wp-content\/uploads\/2026\/10\/bp-blog-waar-is-vitamine-c-goed-voor-8329425a-300x158.webp 300w, https:\/\/bioprofile.com\/wp-content\/uploads\/2026\/10\/bp-blog-waar-is-vitamine-c-goed-voor-8329425a-1024x538.webp 1024w, https:\/\/bioprofile.com\/wp-content\/uploads\/2026\/10\/bp-blog-waar-is-vitamine-c-goed-voor-8329425a-768x403.webp 768w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-sec bp-blog-sec--body is-layout-flow wp-block-group-is-layout-flow\">\n\n<p class=\"bp-blog-lead wp-block-paragraph\">In this article you will find the answer to the question of what vitamin C is good for: what vitamin C does in your body, how much you need and how much you already get, what large studies found about colds, the heart and diabetes, and when extra vitamin C becomes too much. That matters, because many people take a tablet every day without knowing whether their food already gives them enough. <a href=\"https:\/\/bioprofile.com\/en\/scan-lifestyle-test\/\">The BioProfile lifestyle scan<\/a> asks what you eat each day and how you live, such as how often vegetables, fish and pulses are on your plate, and gives you an indication of where you stand today. This is not a diagnosis. It is insight into where you stand today, to help you make better choices about food and lifestyle. The scan does not measure how much vitamin C is in your blood and does not point to a cause. Only a doctor can assess that.<\/p>\n\n\n\n<div class=\"wp-block-group bp-blog-takeaways is-layout-flow wp-block-group-is-layout-flow\">\n\n<h2 class=\"wp-block-heading\">In short<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n\n<li>Vitamin C protects your body&#8217;s cells from damage, is needed to form connective tissue and helps your body absorb iron. In the Netherlands, the advice for adults is 75 mg a day.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a><\/sup><\/li>\n\n\n<li>On average, people in the Netherlands already get more than that amount from food alone: 87 mg a day.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">2<\/a><\/sup><\/li>\n\n\n<li>In the general population, a daily tablet did not give people fewer colds. A cold did clear up a little faster.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">3<\/a><\/sup><\/li>\n\n\n<li>Men who took vitamin C supplements had about twice the chance of a first kidney stone, so taking more is not automatically better.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">4<\/a><\/sup><\/li>\n\n<\/ul>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-toc is-layout-flow wp-block-group-is-layout-flow\">\n\n<p class=\"bp-blog-toclabel wp-block-paragraph\">Contents<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n\n<li><a href=\"#waar-is-vitamine-c-goed-voor-in-je-lichaam\">What vitamin C is good for in your body<\/a><\/li>\n\n\n<li><a href=\"#hoeveel-je-nodig-hebt-en-hoeveel-je-binnenkrijgt\">How much you need and how much you get<\/a><\/li>\n\n\n<li><a href=\"#hoe-je-een-tekort-merkt\">How you notice a deficiency<\/a><\/li>\n\n\n<li><a href=\"#vitamine-c-en-verkoudheid\">Vitamin C and colds<\/a><\/li>\n\n\n<li><a href=\"#vitamine-c-het-hart-en-langer-leven\">Vitamin C, the heart and living longer<\/a><\/li>\n\n\n<li><a href=\"#vitamine-c-en-diabetes\">Vitamin C and diabetes<\/a><\/li>\n\n\n<li><a href=\"#elke-dag-te-veel-en-wat-je-beter-niet-combineert\">Every day, too much and what you are better off not combining<\/a><\/li>\n\n\n<li><a href=\"#wanneer-je-naar-de-huisarts-gaat\">When to see your GP<\/a><\/li>\n\n\n<li><a href=\"#samengevat\">In summary<\/a><\/li>\n\n\n<li><a href=\"#veelgestelde-vragen\">Frequently asked questions<\/a><\/li>\n\n<\/ol>\n\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"waar-is-vitamine-c-goed-voor-in-je-lichaam\">What vitamin C does in your body<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">As an antioxidant, vitamin C protects the body&#8217;s cells against damage. Vitamin C is needed to form connective tissue, the tissue that holds the body together, and helps the body absorb iron.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a><\/sup> The Dutch pharmacists&#8217; website adds that vitamin C is needed for wounds to close properly, for the immune defences and for the blood.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">5<\/a><\/sup> Put simply, your body uses vitamin C every day to protect cells, build tissue and make use of iron.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you search for &#8216;what is vitamin c good for skin&#8217;, you want to know what vitamin C does for your skin. The sources here are about wounds: wounds need vitamin C to close properly,\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">5<\/a><\/sup> and with a deficiency, wounds close more slowly.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a><\/sup> Every source in this article is about vitamin C that you eat or swallow. A vitamin C serum on the skin is a separate question, and these sources do not answer it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">How the body ages at the level of your cells, and how that can differ from the age in your passport, is the subject of <a href=\"https:\/\/bioprofile.com\/en\/biological-age-versus-calendar-age\/\">biological age versus calendar age<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"hoeveel-je-nodig-hebt-en-hoeveel-je-binnenkrijgt\">How much you need and how much you get<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">In the Netherlands, the advice for adults aged 18 and over is 75 mg of vitamin C a day. For children aged 11 to 14, the advice is 45 mg. A portion of red pepper gives you 90 mg, an orange 66 mg and a portion of strawberries 60 mg.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a><\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The 2019 to 2021 Voedselconsumptiepeiling, the Dutch national food consumption survey, found an average intake of 159 mg a day from food and supplements together, and 87 mg a day from food alone. Adults got more than children, and women more than men. The biggest sources were vegetables (24 per cent), fruit, nuts and olives (22 per cent), supplements (16 per cent) and soft drinks and juices (12 per cent).\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">2<\/a><\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">What this means for you: on average, food alone already gives you more than the recommended amount. One orange brings an adult close to 75 mg, and one portion of red pepper already takes you past it.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a><\/sup><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"hoe-je-een-tekort-merkt\">How you notice a deficiency<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">You first notice a deficiency through lower resistance and wounds that close more slowly. In the end it becomes scurvy, with bleeding gums.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a><\/sup> Extra vitamin C is meant for people with a deficiency, such as heavy drinkers and people who eat very little vegetables and fruit.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">5<\/a><\/sup> So the people most likely to run short first are those who rarely eat vegetables or fruit.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"vitamine-c-en-verkoudheid\">Vitamin C and colds<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A Cochrane review brought the studies together. In 29 comparisons with 11,306 participants, people from the general population who took at least 200 mg a day did not get fewer colds. In 5 studies with 598 marathon runners, skiers and soldiers under heavy physical stress, taking vitamin C regularly halved the chance of a cold. With regular use, a cold lasted about 8 per cent shorter in adults and 14 per cent shorter in children. People who only started taking vitamin C once the cold had already begun saw no consistent effect.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">3<\/a><\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Put simply: for most people, a daily tablet does not mean fewer colds, although a cold may clear up a little faster. The pharmacists&#8217; website sums it up: an effect on colds has not been shown.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">5<\/a><\/sup><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"vitamine-c-het-hart-en-langer-leven\">Vitamin C, the heart and living longer<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A large review of prospective studies followed people for years and compared how much vitamin C they got from food. Every extra 100 mg a day from food went together with about a tenth less risk of coronary heart disease, of cardiovascular disease as a whole and of death from any cause, and with a slightly lower risk of stroke. People with more vitamin C in their blood also had clearly lower risks.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">6<\/a><\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">These are links seen in large groups of people. They do not prove that a supplement causes the lower risk.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">6<\/a><\/sup> The link was measured for vitamin C from food, and in the Netherlands vegetables and fruit are its biggest sources.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">2<\/a><\/sup> What else changes in the body as the years go by is covered in <a href=\"https:\/\/bioprofile.com\/en\/healthy-ageing-what-changes-with-the-years\/\">healthy ageing: what changes over the years<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"vitamine-c-en-diabetes\">Vitamin C and diabetes<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A review of 28 randomised trials involving 1,574 people with type 2 diabetes looked at vitamin C supplements. Systolic blood pressure, the upper number, fell by about 6 points, and the researchers had moderate confidence in that result. HbA1c, your long-term blood sugar value, and diastolic blood pressure, the lower number, also fell slightly, but the evidence for both was very weak, and most of the trials were short and small. The authors conclude that vitamin C supplements cannot currently be recommended as a therapy for type 2 diabetes until larger, longer, high-quality trials confirm the findings.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">7<\/a><\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">So the result for blood pressure is interesting, but the researchers themselves say it is too early to count on vitamin C for diabetes.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"elke-dag-te-veel-en-wat-je-beter-niet-combineert\">Every day, too much, and what not to combine<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Most people get enough vitamins by eating healthily and spending enough time outdoors. Thuisarts names a few vitamins that some people need extra: vitamin D, vitamin B12 and folic acid. Vitamin C is not on that list. Getting too many vitamins can be dangerous.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">8<\/a><\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In normal amounts, vitamin C has almost no unwanted effects. Above 1,500 mg a day, nausea or diarrhoea can occur.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">5<\/a><\/sup> The Voedingscentrum puts gut complaints above 2 grams a day and notes that no official upper limit has been set.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a><\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A Swedish study followed 23,355 men aged 45 to 79 with no previous kidney stones for 11 years, and 436 of them developed a first kidney stone. Men who took vitamin C supplements had about twice the risk of men who took no supplements, and at 7 or more tablets a week the risk was slightly higher still. Taking a multivitamin showed no link with kidney stones.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">4<\/a><\/sup> For you, this means a daily high-dose tablet is less harmless than the tablet looks.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Extra caution is needed in three situations. Combining a lot of vitamin C with deferasirox, a medicine that binds iron, can damage the heart. People with G6PD deficiency should avoid high doses. People prone to kidney stones run a higher risk with high doses.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">5<\/a><\/sup><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"wanneer-je-naar-de-huisarts-gaat\">When to see your GP<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A kidney stone stuck between the kidney and the bladder causes very severe pain in your side or belly. Usually the stone passes out with your urine by itself within a few hours to a few days. Contact your GP if painkillers do not help enough, if you get a fever during or after such an attack of pain, or if it hurts to pee.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">9<\/a><\/sup> If a doctor advises a higher dose than the one on the pack, follow the doctor&#8217;s advice.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">8<\/a><\/sup><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"samengevat\">In summary<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vitamin C protects cells, helps form connective tissue, helps the body absorb iron and helps wounds close. Most adults in the Netherlands already get more than the recommended 75 mg from food. For most people, a daily tablet does not mean fewer colds. More vitamin C from food goes together with a lower risk for the heart, and that link does not prove that tablets work. For type 2 diabetes the evidence is still too thin. High doses carry their own risks, such as kidney stones, and some medicines and conditions do not go well with them.<\/p>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-sec bp-blog-cta is-layout-flow wp-block-group-is-layout-flow\">\n\n<h2 class=\"wp-block-heading\">See where you start<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A short set of questions about how you eat and live, and your score appears in your dashboard. What the lifestyle scan measures and what the scan is based on is explained on the scan page.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex 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\/scan-lifestyle-test\/\">Start the lifestyle scan<\/a><\/div>\n\n<\/div>\n\n\n\n<p class=\"bp-blog-ctamicro wp-block-paragraph\">Free, about 3 minutes. An analysis of your answers, never a diagnosis. <a href=\"https:\/\/bioprofile.com\/en\/free-health-check-tests\/\">All health scans<\/a><\/p>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-sec bp-blog-sec--wash is-layout-flow wp-block-group-is-layout-flow\">\n\n<h2 class=\"wp-block-heading\" id=\"veelgestelde-vragen\">Frequently asked questions<\/h2>\n\n\n\n<div class=\"wp-block-group bp-blog-faq-item is-layout-flow wp-block-group-is-layout-flow\">\n\n<h3 class=\"wp-block-heading\">What is vitamin C good for?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vitamin C protects the body&#8217;s cells against damage, is needed to form connective tissue and helps the body absorb iron.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a><\/sup> Vitamin C is also needed for wounds to close properly, for the immune defences and for the blood.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">5<\/a><\/sup><\/p>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-faq-item is-layout-flow wp-block-group-is-layout-flow\">\n\n<h3 class=\"wp-block-heading\">Is it good to take vitamin C every day?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Most people get enough vitamins by eating healthily and spending enough time outdoors. The vitamins that, according to Thuisarts, are sometimes needed as extra are vitamin D, vitamin B12 and folic acid. Vitamin C is not one of them.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">8<\/a><\/sup> Extra vitamin C is meant for people with a deficiency, such as heavy drinkers and people who eat very little fruit and vegetables.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">5<\/a><\/sup><\/p>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-faq-item is-layout-flow wp-block-group-is-layout-flow\">\n\n<h3 class=\"wp-block-heading\">How do you notice a vitamin C deficiency?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The first signs are lower resistance and wounds that close more slowly. A long-term deficiency ends in scurvy, with bleeding gums.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a><\/sup><\/p>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-faq-item is-layout-flow wp-block-group-is-layout-flow\">\n\n<h3 class=\"wp-block-heading\">What is best not to combine with vitamin C?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A lot of vitamin C together with deferasirox, a medicine that binds iron, can damage the heart. People with G6PD deficiency should avoid high doses, and people prone to kidney stones run a higher risk with high doses.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">5<\/a><\/sup><\/p>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-faq-item is-layout-flow wp-block-group-is-layout-flow\">\n\n<h3 class=\"wp-block-heading\">Is vitamin C good for diabetes?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">In trials with people with type 2 diabetes, vitamin C supplements lowered systolic blood pressure, the upper number. The evidence for blood sugar was very weak, and the researchers say it is too early to recommend vitamin C as a therapy for type 2 diabetes.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">7<\/a><\/sup><\/p>\n\n<\/div>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-sec bp-blog-sec--beige bp-blog-sec--tight is-layout-flow wp-block-group-is-layout-flow\">\n\n<h2 class=\"wp-block-heading\" id=\"bronnen\">Sources<\/h2>\n\n\n\n<p class=\"bp-blog-srclead wp-block-paragraph\">Every source below was checked on the day this article was published. The numbering follows the text.<\/p>\n\n\n\n<ol class=\"wp-block-list bp-blog-refs\">\n\n<li>Voedingscentrum. Vitamin C (ascorbic acid). Encyclopaedia, voedingscentrum.nl. <a href=\"https:\/\/www.voedingscentrum.nl\/encyclopedie\/vitamine-c.aspx\">voedingscentrum.nl<\/a><\/li>\n\n\n<li>RIVM. Inname vitamine C. Wat eet Nederland, Voedselconsumptiepeiling (VCP) 2019-2021. <a href=\"https:\/\/wateetnederland.nl\/resultaten\/vitamines-en-mineralen\/inname\/vitamine-C\">wateetnederland.nl<\/a><\/li>\n\n\n<li>Hemil\u00e4 H, Chalker E. Vitamin C for preventing and treating the common cold. Cochrane Database of Systematic Reviews, 2013. <a href=\"https:\/\/doi.org\/10.1002\/14651858.CD000980.pub4\">doi.org\/10.1002\/14651858.CD000980.pub4<\/a><\/li>\n\n\n<li>Thomas LD, Elinder CG, Tiselius HG, Wolk A, Akesson A. Ascorbic acid supplements and kidney stone incidence among men: a prospective study. JAMA Internal Medicine, 2013;173(5):386-388. <a href=\"https:\/\/doi.org\/10.1001\/jamainternmed.2013.2296\">doi.org\/10.1001\/jamainternmed.2013.2296<\/a><\/li>\n\n\n<li>KNMP. Vitamine C. Apotheek.nl. <a href=\"https:\/\/www.apotheek.nl\/medicijnen\/vitamine-c\">apotheek.nl<\/a><\/li>\n\n\n<li>Aune D, Keum N, Giovannucci E, Fadnes LT, Boffetta P, Greenwood DC, Tonstad S, Vatten LJ, Riboli E, Norat T. Dietary intake and blood concentrations of antioxidants and the risk of cardiovascular disease, total cancer, and all-cause mortality: a systematic review and dose-response meta-analysis of prospective studies. American Journal of Clinical Nutrition, 2018. <a href=\"https:\/\/doi.org\/10.1093\/ajcn\/nqy097\">doi.org\/10.1093\/ajcn\/nqy097<\/a><\/li>\n\n\n<li>Mason SA, Keske MA, Wadley GD. Effects of Vitamin C Supplementation on Glycemic Control and Cardiovascular Risk Factors in People With Type 2 Diabetes: A GRADE-Assessed Systematic Review and Meta-analysis of Randomized Controlled Trials. Diabetes Care, 2021;44:618-630. <a href=\"https:\/\/doi.org\/10.2337\/dc20-1893\">doi.org\/10.2337\/dc20-1893<\/a><\/li>\n\n\n<li>NHG. Heb ik extra vitamines nodig? Thuisarts.nl. <a href=\"https:\/\/www.thuisarts.nl\/gezond-leven\/krijg-ik-genoeg-vitamines-binnen\">thuisarts.nl<\/a><\/li>\n\n\n<li>NHG. Ik heb een pijnaanval door een niersteen. Thuisarts.nl. <a href=\"https:\/\/www.thuisarts.nl\/niersteen\/ik-heb-pijnaanval-door-niersteen\">thuisarts.nl<\/a><\/li>\n\n<\/ol>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-sec bp-blog-sec--tight is-layout-flow wp-block-group-is-layout-flow\">\n\n<h2 class=\"wp-block-heading\">Also read<\/h2>\n\n\n\n<div class=\"wp-block-group bp-blog-related is-layout-flow wp-block-group-is-layout-flow\">\n\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/bioprofile.com\/en\/healthy-ageing-what-changes-with-the-years\/\">Healthy ageing: what measurably changes over the years, what a 30-year Dutch cohort puts at the top and what a lifestyle scan measures<\/a><\/p>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/bioprofile.com\/en\/biological-age-versus-calendar-age\/\">Biological age versus calendar age: what biological age tests measure, what the numbers are linked to and what a lifestyle scan shows<\/a><\/p>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-sec bp-blog-sec--tight is-layout-flow wp-block-group-is-layout-flow\">\n\n<h2 class=\"wp-block-heading\">Written by<\/h2>\n\n\n\n<div class=\"wp-block-group bp-blog-author is-layout-flow wp-block-group-is-layout-flow\">\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"320\" height=\"320\" src=\"https:\/\/bioprofile.com\/wp-content\/uploads\/2026\/07\/author-jesse-round-320.jpg\" alt=\"Jesse van der Velde\" class=\"wp-image-4815\" srcset=\"https:\/\/bioprofile.com\/wp-content\/uploads\/2026\/07\/author-jesse-round-320.jpg 320w, https:\/\/bioprofile.com\/wp-content\/uploads\/2026\/07\/author-jesse-round-320-300x300.jpg 300w, https:\/\/bioprofile.com\/wp-content\/uploads\/2026\/07\/author-jesse-round-320-150x150.jpg 150w\" sizes=\"(max-width: 320px) 100vw, 320px\" \/><\/figure>\n\n\n\n<div class=\"wp-block-group bp-blog-authorid is-layout-flow wp-block-group-is-layout-flow\">\n\n<p class=\"bp-blog-authorrole wp-block-paragraph\">Founder of BioProfile<\/p>\n\n\n\n<p class=\"bp-blog-authorname wp-block-paragraph\">Jesse van der Velde<\/p>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-authorbody is-layout-flow wp-block-group-is-layout-flow\">\n\n<p class=\"bp-blog-authorbio wp-block-paragraph\">Jesse van der Velde has been guiding people to a new body and optimal health since 2006, and has written or co-written fifteen books on nutrition and health. Forever Young (2012) and Superfood Recipes (2013) both reached number 1 in the Netherlands.<\/p>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-authormeta is-layout-flow wp-block-group-is-layout-flow\">\n\n<p class=\"bp-blog-authorbio wp-block-paragraph\"><a href=\"https:\/\/nl.linkedin.com\/in\/jessevdv\">LinkedIn<\/a><\/p>\n\n\n\n<p class=\"bp-blog-dates wp-block-paragraph\">Published on 6 October 2026 \u00b7 Last updated on 6 October 2026<\/p>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-sec bp-blog-sec--foot is-layout-flow wp-block-group-is-layout-flow\">\n\n<p class=\"bp-blog-legal wp-block-paragraph\">BioProfile analyses your health status to guide you and your coach. It does not make a diagnosis, only a doctor can do that. Built on validated health questionnaires; the combined BioProfile score is not itself a validated clinical instrument yet. Your answers stay private (GDPR).<\/p>\n\n<\/div>\n\n<\/article>\n","protected":false},"excerpt":{"rendered":"<p>What is vitamin C good for: what the vitamin does, how much you need, what studies show about colds, the heart and diabetes, and when extra becomes too much.<\/p>\n","protected":false},"author":18,"featured_media":7736,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_meta-robots-noindex":"2","_yoast_wpseo_opengraph-image":"","_yoast_wpseo_opengraph-image-id":"","_yoast_wpseo_twitter-image":"","_yoast_wpseo_twitter-image-id":"","inline_featured_image":false,"footnotes":""},"categories":[71],"tags":[],"class_list":["post-8000","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-healthy-aging-en"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What is vitamin C good for? Studies, dose, limits | BioProfile<\/title>\n<meta name=\"description\" content=\"What is vitamin C good for: what the vitamin does, how much you need, what studies show about colds, the heart and diabetes, and when extra becomes too much.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/bioprofile.com\/en\/what-is-vitamin-c-good-for\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is vitamin C good for? 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