{"title":"Vitamin D","description":"\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"BreadcrumbList\",\n  \"itemListElement\": [\n    { \"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/plenthera.com\/\" },\n    { \"@type\": \"ListItem\", \"position\": 2, \"name\": \"Categorieën\", \"item\": \"https:\/\/plenthera.com\/collections\/\" },\n    { \"@type\": \"ListItem\", \"position\": 3, \"name\": \"Vitamine D\", \"item\": \"https:\/\/plenthera.com\/collections\/vitamine-d\/\" }\n  ]\n}\n\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"CollectionPage\",\n  \"name\": \"Vitamine D bij Plenthera\",\n  \"description\": \"Premium vitamine D3 — druppels, capsules en met K2-synergie. EFSA-erkend voor botten, spieren en immuunsysteem.\",\n  \"url\": \"https:\/\/plenthera.com\/collections\/vitamine-d\/\",\n  \"inLanguage\": \"nl-NL\",\n  \"isPartOf\": { \"@type\": \"WebSite\", \"name\": \"Plenthera\", \"url\": \"https:\/\/plenthera.com\/\" },\n  \"about\": {\n    \"@type\": \"Thing\",\n    \"name\": \"Vitamine D\",\n    \"alternateName\": [\"Cholecalciferol\", \"D3\", \"Zonnevitamine\"],\n    \"description\": \"Vitamine D is een vetoplosbare vitamine die het lichaam zelf aanmaakt via de huid bij UVB-zonlicht. Belangrijk voor calciumhuishouding, botten, spieren en immuunsysteem.\"\n  }\n}\n\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Wat is vitamine D?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Vitamine D is een vetoplosbare vitamine die het lichaam zelf aanmaakt via de huid bij blootstelling aan UVB-zonlicht. Vitamine D speelt een rol bij calciumopname, botten, spieren en het immuunsysteem.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Wat is het verschil tussen vitamine D2 en D3?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"D2 (ergocalciferol) is plantaardig (uit gist of paddenstoelen), D3 (cholecalciferol) is dierlijk of uit lichen (vegan). D3 verhoogt de bloedwaarde 25(OH)D effectiever dan D2 en is daarom de voorkeursvorm in supplementen.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Hoeveel vitamine D per dag?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"De Europese RI is 5 µg per dag. De Nederlandse Gezondheidsraad adviseert 10 µg voor volwassenen die weinig in de zon komen, en 20 µg voor 70+ en zwangeren. EFSA-bovengrens voor langdurig gebruik: 100 µg\/dag.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Wanneer vitamine D innemen?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Vitamine D is vetoplosbaar en wordt het beste opgenomen bij een maaltijd die enig vet bevat. Ochtend of middag heeft een lichte voorkeur, omdat sommige mensen 's avonds gevoelig zijn voor de subtiele effecten op het bioritme.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Wat doet vitamine K2 bij vitamine D?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Vitamine D verhoogt de calciumopname uit voeding. Vitamine K2 activeert eiwitten die calcium naar de botten en tanden sturen, in plaats van naar zachte weefsels zoals bloedvatwanden. De combinatie D3+K2 wordt daarom vaak als logisch duo gekozen.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\n\u003carticle\u003e\n\u003cp\u003e\u003cem\u003eWritten by the Plenthera team (orthomolecularly trained). Scientifically reviewed in April 2026. Last updated: April 30, 2026.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003eVitamin D is perhaps the most discussed micronutrient of the past decade. The body produces it itself via the skin when exposed to UVB sunlight, but in the Netherlands, for most of the year, the sun is at too low an angle for effective production. At Plenthera, you'll find \u003ca href=\"\/en\/collections\/vitamine-d\"\u003evitamin D\u003c\/a\u003e in all relevant dosages and forms: D3 drops for flexibility, capsules for convenience, and combination products with K2 for optimal synergy. \u003ca href=\"https:\/\/www.efsa.europa.eu\/en\/topics\/topic\/food-supplements\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eEFSA\u003c\/a\u003e-approved for bones, muscles, and the immune system.\u003c\/p\u003e\n\n\u003cnav aria-label=\"Table of contents\"\u003e\u003ch2\u003eTable of Contents\u003c\/h2\u003e\n\n\u003col\u003e\n\n\u003cli\u003e\u003ca href=\"#vergelijking\"\u003eWhich vitamin D is right for you?\u003c\/a\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003ca href=\"#wat-is-vitamine-d\"\u003eWhat is vitamin D?\u003c\/a\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003ca href=\"#efsa-claims\"\u003eVitamin D and EFSA — what is scientifically recognized?\u003c\/a\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003ca href=\"#het-magnesium-puzzelstuk-waarom-een-d-supplement-zonder-magn\"\u003eThe magnesium puzzle piece — why a D supplement without magnesium can be suboptimal\u003c\/a\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003ca href=\"#vormen\"\u003eThe vitamin D forms at Plenthera\u003c\/a\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003ca href=\"#hoe-gebruik\"\u003eHow to use vitamin D?\u003c\/a\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003ca href=\"#mythes\"\u003eMyths and misconceptions about vitamin D\u003c\/a\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003ca href=\"#combineren\"\u003eCombining Vitamin D with other supplements\u003c\/a\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003ca href=\"#faq\"\u003eFrequently Asked Questions\u003c\/a\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003ca href=\"#bronnen\"\u003eSources\u003c\/a\u003e\u003c\/li\u003e\n\n\n\u003c\/ol\u003e\u003c\/nav\u003e\n\u003csection\u003e\u003ch2 id=\"vergelijking\"\u003eWhich vitamin D is right for you?\u003c\/h2\u003e\n\n\u003ctable\u003e\n\n\u003cthead\u003e\u003ctr\u003e\n\n\u003cth\u003eForm\u003c\/th\u003e\n\n\u003cth\u003eDosage\u003c\/th\u003e\n\n\u003cth\u003eBest for\u003c\/th\u003e\n\n\u003cth\u003eSpecial feature\u003c\/th\u003e\n\n\n\u003c\/tr\u003e\u003c\/thead\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eD3 capsules\u003c\/td\u003e\n\n\u003ctd\u003e25-100 µg\u003c\/td\u003e\n\n\u003ctd\u003eDaily use for adults\u003c\/td\u003e\n\n\u003ctd\u003eSimple, in oil\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eD3 drops\u003c\/td\u003e\n\n\u003ctd\u003eFlexible dosing\u003c\/td\u003e\n\n\u003ctd\u003eChildren, elderly, dosage fine-tuning\u003c\/td\u003e\n\n\u003ctd\u003eUnder the tongue\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eD3 + K2\u003c\/td\u003e\n\n\u003ctd\u003e25-75 µg D + 50-100 µg K2\u003c\/td\u003e\n\n\u003ctd\u003eBone and vascular health\u003c\/td\u003e\n\n\u003ctd\u003eSynergy K2 directs calcium\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eVegan D3 (lichen)\u003c\/td\u003e\n\n\u003ctd\u003e25-75 µg\u003c\/td\u003e\n\n\u003ctd\u003eVegan diet\u003c\/td\u003e\n\n\u003ctd\u003ePlant-based, equally effective\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eCod liver oil\u003c\/td\u003e\n\n\u003ctd\u003eVariable\u003c\/td\u003e\n\n\u003ctd\u003eWinter, traditional source\u003c\/td\u003e\n\n\u003ctd\u003eWith vitamin A and omega 3\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\u003c\/section\u003e\n\u003csection\u003e\u003ch2 id=\"wat-is-vitamine-d\"\u003eWhat is vitamin D?\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eVitamin D is a fat-soluble vitamin that the body can produce itself via the skin when exposed to UVB sunlight. It effectively functions as a hormone and plays a role in calcium absorption, bones, muscles, teeth, and the immune system.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eStrictly speaking, vitamin D is not a classic vitamin, but a steroid hormone precursor. When UVB light (wavelength 290-315 nm) hits the skin, 7-dehydrocholesterol is converted to pre-vitamin D3, which then spontaneously isomerizes to vitamin D3 (cholecalciferol). In the liver, this is converted to 25(OH)D — the form measured in blood tests — and in the kidneys to calcitriol, the active hormonal form.\u003c\/p\u003e\n\n\u003cp\u003eIn the Netherlands, from October to April, the sun is at too low an angle for significant production. In addition, many people spend little time outdoors, wear concealing clothing, or have a skin type that produces pigment more efficiently (which slows down production). The \u003ca href=\"https:\/\/www.gezondheidsraad.nl\/documenten\/2012\/09\/26\/evaluatie-van-de-voedingsnormen-voor-vitamine-d\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eDutch Health Council\u003c\/a\u003e therefore advises supplementation for specific groups: 10 µg for people with little sun exposure, and 20 µg for those aged 70+ and pregnant women.\u003c\/p\u003e\n\n\u003cp\u003eVitamin D has two important \"partners\" in its function: \u003ca href=\"\/en\/collections\/magnesium\"\u003emagnesium\u003c\/a\u003e and vitamin K2. The activation of vitamin D in the liver and kidneys is dependent on magnesium-containing enzymes — thus, a low magnesium status inhibits the action of vitamin D. Vitamin K2 directs the calcium absorbed by vitamin D to the correct destination (bones and teeth). Check out our magnesium category and \u003ca href=\"\/en\/collections\/vitamine-k\"\u003evitamin K category\u003c\/a\u003e for the combinations.\u003c\/p\u003e\u003c\/section\u003e\n\u003csection\u003e\u003ch2 id=\"efsa-claims\"\u003eVitamin D and EFSA — what is scientifically recognized?\u003c\/h2\u003e\n\n\u003cp\u003eVitamin D has an extensive range of recognized \u003ca href=\"https:\/\/www.efsa.europa.eu\/en\/topics\/topic\/health-claims\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eEFSA\u003c\/a\u003e claims, included in EU Regulation 432\/2012. The following formulations may be used literally — provided the threshold is met:\u003c\/p\u003e\n\n\u003cblockquote\u003e\u003cem\u003e\u003cstrong\u003e\"Vitamin D contributes to the normal absorption\/utilisation of calcium and phosphorus.\"\u003c\/strong\u003e\u003c\/em\u003e\u003c\/blockquote\u003e\n\n\u003cblockquote\u003e\u003cem\u003e\u003cstrong\u003e\"Vitamin D contributes to normal blood calcium levels.\"\u003c\/strong\u003e\u003c\/em\u003e\u003c\/blockquote\u003e\n\n\u003cblockquote\u003e\u003cem\u003e\u003cstrong\u003e\"Vitamin D contributes to the maintenance of normal bones.\"\u003c\/strong\u003e\u003c\/em\u003e\u003c\/blockquote\u003e\n\n\u003cblockquote\u003e\u003cem\u003e\u003cstrong\u003e\"Vitamin D contributes to the maintenance of normal muscle function.\"\u003c\/strong\u003e\u003c\/em\u003e\u003c\/blockquote\u003e\n\n\u003cblockquote\u003e\u003cem\u003e\u003cstrong\u003e\"Vitamin D contributes to the maintenance of normal teeth.\"\u003c\/strong\u003e\u003c\/em\u003e\u003c\/blockquote\u003e\n\n\u003cblockquote\u003e\u003cem\u003e\u003cstrong\u003e\"Vitamin D contributes to the normal function of the immune system.\"\u003c\/strong\u003e\u003c\/em\u003e\u003c\/blockquote\u003e\n\n\u003cblockquote\u003e\u003cem\u003e\u003cstrong\u003e\"Vitamin D has a role in the process of cell division.\"\u003c\/strong\u003e\u003c\/em\u003e\u003c\/blockquote\u003e\n\n\u003cblockquote\u003e\u003cem\u003e\u003cstrong\u003e\"Vitamin D is needed for normal growth and development of bone in children.\"\u003c\/strong\u003e\u003c\/em\u003e\u003c\/blockquote\u003e\n\n\u003cp\u003eThreshold: claims apply for a daily intake that provides at least 15% of the RI — which is 0.75 µg of vitamin D per serving. Our products usually deliver significantly more than this threshold, in the range of 25-100 µg per dose.\u003c\/p\u003e\u003c\/section\u003e\n\u003csection\u003e\u003ch2 id=\"het-magnesium-puzzelstuk-waarom-een-d-supplement-zonder-magn\"\u003eThe magnesium puzzle piece — why a D supplement without magnesium can be suboptimal\u003c\/h2\u003e\n\n\u003cp\u003eThe activation of vitamin D involves a chain of enzymatic steps, several of which require magnesium as a cofactor. A low magnesium status can therefore explain why some people do not achieve optimal 25(OH)D blood levels despite vitamin D supplementation.\u003c\/p\u003e\n\n\u003cp\u003eResearch (including studies by \u003ca href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/28471760\/\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eReddy \u0026amp; Edwards in Am J Therapeutics\u003c\/a\u003e) points to an interaction: sufficient magnesium supports vitamin D metabolism, and vitamin D in turn supports mineral balance. For those who want to maximize the benefits of a vitamin D supplement, a healthy magnesium intake is a logical addition.\u003c\/p\u003e\n\n\u003cp\u003eCheck out our \u003ca href=\"\/en\/collections\/magnesium\"\u003emagnesium category\u003c\/a\u003e for common forms (bisglycinate, citrate, malate) and choose the form that suits your daily profile.\u003c\/p\u003e\u003c\/section\u003e\n\u003csection\u003e\u003ch2 id=\"vormen\"\u003eThe vitamin D forms at Plenthera\u003c\/h2\u003e\n\n\u003ch3\u003eVitamin D3 capsules\u003c\/h3\u003e\n\n\u003cp\u003eThe most common form: a softgel or capsule with vitamin D3 in oil, for optimal absorption. Available in dosages from 25 µg (1000 IU) to 100 µg (4000 IU). Suitable for those who prefer to take pills over drops.\u003c\/p\u003e\n\n\u003ch3\u003eVitamin D3 drops\u003c\/h3\u003e\n\n\u003cp\u003eFor those who don't want pills or want to adjust dosages: vitamin D in MCT or olive oil. One drop under the tongue or with a meal. Ideal for children, the elderly, and those who want flexible dosing.\u003c\/p\u003e\n\n\u003ch3\u003eVitamin D3 + K2\u003c\/h3\u003e\n\n\u003cp\u003eThe synergy form. Vitamin K2 activates proteins (osteocalcin, matrix-Gla-protein) that direct calcium to bones and teeth. The D3+K2 combination is chosen by many for bone and cardiovascular health.\u003c\/p\u003e\n\n\u003ch3\u003eVegan Vitamin D3 (from lichen)\u003c\/h3\u003e\n\n\u003cp\u003eD3 — previously only available from animal sources — is now also produced plant-based from lichen. Effective and plant-based. Also check out our \u003ca href=\"\/en\/collections\/supplementen-veganisten\"\u003esupplements for vegans\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eCod liver oil (D + A + omega 3)\u003c\/h3\u003e\n\n\u003cp\u003eA traditional source that provides vitamin A and omega 3 in addition to vitamin D. Popular in winter — also see our \u003ca href=\"\/en\/collections\/omega-3-vetzuren\"\u003eomega 3 category\u003c\/a\u003e for more information.\u003c\/p\u003e\u003c\/section\u003e\n\u003csection\u003e\u003ch2 id=\"hoe-gebruik\"\u003eHow to use vitamin D?\u003c\/h2\u003e\n\n\u003cp\u003eSimple basic approach to vitamin D:\u003c\/p\u003e\n\n\u003col\u003e\n\n\u003cli\u003eDetermine your needs based on age, sun exposure, and diet.\u003c\/li\u003e\n\n\u003cli\u003eFor most adults, 25-50 µg (1000-2000 IU) D3 per day is a safe baseline.\u003c\/li\u003e\n\n\u003cli\u003eFor specific groups (70+, pregnant women) or in cases of proven deficiency: 50-100 µg per day.\u003c\/li\u003e\n\n\u003cli\u003eTake vitamin D with a meal containing some fat — fat-soluble, so absorption-dependent.\u003c\/li\u003e\n\n\u003cli\u003eCombine with sufficient magnesium intake for optimal activation.\u003c\/li\u003e\n\n\u003cli\u003eConsider vitamin K2 for the bone and cardiovascular pathway — especially with higher D3 dosages.\u003c\/li\u003e\n\n\u003cli\u003eIf in doubt or for long-term use, have your 25(OH)D blood level tested (optimum often 75-125 nmol\/L).\u003c\/li\u003e\n\n\n\u003c\/ol\u003e\u003c\/section\u003e\n\u003csection\u003e\u003ch2 id=\"mythes\"\u003eMyths and misconceptions about vitamin D\u003c\/h2\u003e\n\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eMyth 1: \"You don't need to take vitamin D in summer.\"\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003eFor some, that's true — those who spend a lot of time outdoors with uncovered skin can produce enough in summer. But in the Netherlands, even in July, the sun is not at the right angle all day, sunscreen blocks UVB, and many people stay indoors during the day. A blood value measurement at the end of summer will provide clarity.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eMyth 2: \"Vitamin D2 is just as good as D3.\"\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003eD3 (cholecalciferol) increases 25(OH)D blood levels significantly more effectively than D2 (ergocalciferol) at the same dosage. Therefore, D3 is the preferred form for supplementation — including plant-based D3 from lichen for vegans.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eMyth 3: \"The more vitamin D, the better.\"\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003eVitamin D is fat-soluble — overdosing is possible. The \u003ca href=\"https:\/\/www.nvwa.nl\/onderwerpen\/voedingssupplementen\/risico-s-voedingssupplementen\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eNVWA\u003c\/a\u003e and EFSA set an upper limit of 100 µg per day for long-term intake. Above that limit, hypercalcemia (too much calcium in the blood) is a possible risk. Standard dosages (25-50 µg) are well within the safe range.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eMyth 4: \"A light therapy lamp works just as well as sun or supplements.\"\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003eA regular \"daylight\" lamp does not produce UVB and does not contribute to vitamin D production. Special UVB lamps can, but are expensive and require careful use. For most people, a supplement is more practical and safer.\u003c\/p\u003e\u003c\/section\u003e\n\u003csection\u003e\u003ch2 id=\"combineren\"\u003eCombining Vitamin D with other supplements\u003c\/h2\u003e\n\n\u003cp\u003eVitamin D works synergistically with various other nutrients. Popular combinations:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003ca href=\"\/en\/collections\/vitamine-k\"\u003eVitamin K2\u003c\/a\u003e: directs calcium to bones and teeth instead of soft tissues — especially relevant with higher D3 dosages.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003ca href=\"\/en\/collections\/magnesium\"\u003eMagnesium\u003c\/a\u003e: cofactor in the activation of vitamin D. A low magnesium status inhibits the effectiveness of D supplementation.\u003c\/li\u003e\n\n\u003cli\u003eCalcium: vitamin D increases calcium absorption. For those focusing primarily on bones, calcium + D3 + K2 is a logical trio.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003ca href=\"\/en\/collections\/omega-3-vetzuren\"\u003eOmega 3 (cod liver oil)\u003c\/a\u003e: natural combination — cod liver oil naturally provides D, A, and omega 3.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003ca href=\"\/en\/collections\/multi-vitamines\"\u003eMultivitamin\u003c\/a\u003e: for those who want complete coverage without separate supplements.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\u003c\/section\u003e\n\u003csection\u003e\u003ch2 id=\"faq\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat is vitamin D?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eVitamin D is a fat-soluble vitamin that the body produces itself via the skin when exposed to UVB sunlight. It plays a role in calcium absorption, bones, muscles, and the immune system.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between D2 and D3?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eD2 (ergocalciferol) is plant-based, D3 (cholecalciferol) is animal-derived or from lichen (vegan). D3 is more effective in increasing blood 25(OH)D levels and is therefore the preferred form.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow much vitamin D per day?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eEU-RI: 5 µg. The Dutch Health Council advises 10 µg for people with little sun exposure and 20 µg for those aged 70+ and pregnant women. EFSA upper limit: 100 µg\/day for adults.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhen to take vitamin D?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eWith a meal containing some fat for optimal absorption. Morning or afternoon is slightly preferred — some people experience a slightly alerting effect in the evening.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat does vitamin K2 do with vitamin D?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eD increases calcium absorption; K2 activates proteins that direct calcium to bones and teeth, instead of soft tissues. The combination is often chosen for bone and cardiovascular health.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo you need magnesium with vitamin D?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eMagnesium is a cofactor in the activation of vitamin D. A low magnesium status inhibits the action of D supplementation — sufficient magnesium intake is therefore logical.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eVitamin D for children — how much?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eChildren aged 0-4 years: 10 µg per day (Health Council). If in doubt, ask your consultation bureau or doctor for advice.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat are vitamin D deficiency symptoms?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003ePossible signs: fatigue, muscle weakness, frequent colds, bone pain, depressed mood. No single symptom is conclusive; a 25(OH)D blood test provides clarity.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo you need vitamin D in summer too?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eMany people get enough production from the sun in summer (May-September). With concealing clothing, dark skin, little time outdoors, or sunscreen \u0026gt;SPF 15, supplementation remains useful.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs vegan vitamin D3 available?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eYes. Plant-based D3 is extracted from lichen and is as effective as animal D3. Suitable for vegans and pescatarians.\u003c\/p\u003e\u003c\/section\u003e\n\u003csection\u003e\u003ch2 id=\"bronnen\"\u003eSources\u003c\/h2\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003ca href=\"https:\/\/www.efsa.europa.eu\/en\/topics\/topic\/health-claims\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eEFSA Regulation (EU) 432\/2012\u003c\/a\u003e — vitamin D claims.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003ca href=\"https:\/\/www.efsa.europa.eu\/en\/topics\/topic\/food-supplements\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eEFSA NDA Panel\u003c\/a\u003e — Scientific Opinion on Tolerable Upper Intake Level for vitamin D (2012).\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003ca href=\"https:\/\/www.gezondheidsraad.nl\/documenten\/2012\/09\/26\/evaluatie-van-de-voedingsnormen-voor-vitamine-d\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eDutch Health Council\u003c\/a\u003e — Dietary reference values for vitamin D (2012).\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003ca href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/28471760\/\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eReddy P. \u0026amp; Edwards LR.\u003c\/a\u003e, \"Magnesium Supplementation in Vitamin D Deficiency\", Am J Therapeutics (2019).\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003ca href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/17634462\/\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eHolick MF.\u003c\/a\u003e, \"Vitamin D Deficiency\", N Engl J Med (2007).\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003ca href=\"https:\/\/www.rivm.nl\/voeding\/aanvullend-onderzoek-microvoedingsstoffen\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eRIVM\u003c\/a\u003e — food consumption studies on vitamin D status of the Dutch population.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\u003c\/section\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eDisclaimer:\u003c\/strong\u003e This text is intended for informational purposes only and does not replace medical advice. Vitamin D is a dietary supplement, not a medicine. In case of doubt or if you are taking medication, we recommend consulting a doctor or orthomolecular therapist first.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003c\/article\u003e","products":[{"product_id":"arthur-andrew-kd-ultra-r-90-caps","title":"KD Ultra® (90 Capsules) | Full Spectrum Vitamin K2 with Vegan Vitamin D3 - Arthur Andrew","description":"\u003cp\u003eKD Ultra® contains vitamin D3 from lichen (2,500 IU per capsule) and vitamin K2 in three forms (MK-4, MK-6, MK-7) in combination with vitamin K1. The formula also contains the enzyme lipase. Vegetable capsules, vegan certified.\u003c\/p\u003e\n\u003cp\u003e90 capsules per jar (90 servings of 1 capsule).\u003c\/p\u003e","brand":"Arthur Andrew Medical","offers":[{"title":"Default Title","offer_id":56769258946905,"sku":"AAM1055","price":49.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/6127\/3177\/files\/arthur-andrew-kd-ultra-90caps-1.jpg?v=1773848182"},{"product_id":"vitals-vitamine-d3-3000-ie-100-softgels","title":"Vitamin D3 3000 IU - 100 softgels","description":"\u003cp\u003eVitals Vitamin D3 3000 IU contains 100 softgels, each with 75 µg cholecalciferol (vitamin D3) from a plant-based source (algae). This is an extra high dosage (1500% RI) that can be used for an increased vitamin D requirement. The softgels are made entirely from plant-based material (cassava starch) and contain extra virgin olive oil as a base. The recommended dosage is 1 softgel per day. One jar contains 100 softgels, enough for 100 days. The product is 100% vegan.\u003c\/p\u003e","brand":"Vitals","offers":[{"title":"Default Title","offer_id":56769439957337,"sku":"v4027","price":19.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/6127\/3177\/files\/vitals-vitamine-d3-3000-ie-100-softgels.jpg?v=1774530561"},{"product_id":"arthur-andrew-kd-ultra-r-4x90-caps-3-1-gratis-aanbieding","title":"KD Ultra® - 4x90 caps - 3+1 Free Offer","description":"\u003cp\u003eKD Ultra® contains vitamin D3 from lichen (2,500 IU per capsule) and vitamin K2 in three forms (MK-4, MK-6, MK-7) in combination with vitamin K1. The formula also contains the enzyme lipase. Vegetable capsules, vegan certified.\u003c\/p\u003e\n\u003cp\u003e4 jars with 90 capsules each (360 servings of 1 capsule).\u003c\/p\u003e","brand":"Arthur Andrew Medical","offers":[{"title":"Default Title","offer_id":56769477476697,"sku":"BP-AAM-004","price":149.85,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/6127\/3177\/files\/arthur-andrew-medical-kd-ultra-4x90-capsules-voordeelpakket-3plus1.jpg?v=1764601384"},{"product_id":"vitals-botformule-pro-60-tabs","title":"Bone and Dental Formula Pro – Calcium, Magnesium, D3, K2 \u0026 Silicon – 60 Tablets","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eVitals Bone and Tooth Formula Pro combines five classic bone nutrients in one tablet: calcium, magnesium, vitamin D3, vitamin K2, and silicon — the minerals in Albion® Minerals' amino acid-chelated TRAACS® form, vitamin K2 in Balchem's encapsulated K2VITAL™ DELTA form, and silicon as Eytelia's MESOPOROSIL®. Vegan, 60 tablets. Calcium, magnesium, vitamin D, and vitamin K contribute to the maintenance of normal bones.\u003c\/span\u003e\u003c\/p\u003e","brand":"Vitals","offers":[{"title":"Default Title","offer_id":56769567785305,"sku":"V4508","price":24.95,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/6127\/3177\/files\/V4508-Bot-en-Tandformule-Pro-60x165mm.png?v=1777629070"},{"product_id":"vitals-vitamine-k2-d3-60-caps","title":"Vitamin K2+D3 - 60 caps","description":"\u003cp\u003eVitals Vitamin K2 + D3 contains 60 softgels with a generous dosage of both fat-soluble vitamins in an MCT oil base. The vitamin K2 is menaquinone-7 (MK-7) from K2VITAL™ (Balchem) and the vitamin D3 is cholecalciferol from algae (Vitamin D3V®, plant-based). The softgels are vegan and the recommended dosage is 1–2 softgels per day with a (fat-containing) meal. One jar contains 60 softgels, enough for 30–60 days. The product is 100% vegan.\u003c\/p\u003e","brand":"Vitals","offers":[{"title":"Default Title","offer_id":56769576599897,"sku":"V4423","price":19.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/6127\/3177\/files\/vitals-vitamine-k2-90-mcg-met-vitamine-d3-25-mcg-60-capsules-new-1.jpg?v=1774529836"},{"product_id":"nordic-naturals-ultimate-omega-d3-sport-lemon-60-softgels","title":"Ultimate Omega-D3 Sport — 60 Softgels","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eNordic Naturals Ultimate Omega-D3 Sport is a concentrated omega-3 fish oil with vitamin D3, NSF Certified for Sport — independently tested for prohibited substances according to the WADA list. For athletes who want certainty about what they are taking, especially around examinations or doping controls. Wild-caught anchovies and sardines (Engraulis ringens, Sardinops sagax) as an omega-3 source. Bottle of 60 softgels, sufficient for approximately 30 daily doses.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Nordic Naturals","offers":[{"title":"Default Title","offer_id":56769608352089,"sku":"NN8084","price":29.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/6127\/3177\/files\/nordic-naturals-ultimate-omega-d3-sport-1480mg-lemon-60-softgels-1.jpg?v=1774450604"},{"product_id":"nordic-naturals-babys-dha-1050mg-vitamin-d3-60ml","title":"Baby's DHA 1050mg + Vitamin D3 - 60ml","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eNordic Naturals Baby's DHA is a cod liver oil specially developed for infants, with vitamin D3 — formulated for ages 0 to 12 months. The bottle includes a dropper for dosage based on body weight, with natural lemon extract as the only flavouring. To be used only under the guidance of a parent or caregiver — always follow the dosage chart on the packaging. 60 ml bottle.\u003c\/span\u003e\u003c\/p\u003e","brand":"Nordic Naturals","offers":[{"title":"Default Title","offer_id":56769623916889,"sku":"NN1021","price":18.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/6127\/3177\/files\/nordic-natural-s-baby-s-dha-fish-oil-1050mg-omega-3-with-vitamin-d3-60-ml-1.jpg?v=1774450452"},{"product_id":"vitals-vitamine-d3-druppels-20ml","title":"Vitamin D3 Drops - 20ml","description":"\u003cp\u003eVitals Vitamin D3 200 IU Drops contains 20 ml (approx. 700 drops) with 5 µg (200 IU) vitamin D3 per drop. The product is suitable for children aged 0 and older, and adults. The vitamin D3 is dissolved in a special high oleic sunflower oil that is naturally low in omega 6 and contains more than 75% omega 9 (oleic acid). The convenient dropper allows for easy and precise dosing. The product is vegetarian.\u003c\/p\u003e","brand":"Vitals","offers":[{"title":"Default Title","offer_id":56769624473945,"sku":"V2252","price":14.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/6127\/3177\/files\/vitals-vitamine-d3-druppels-20ml.jpg?v=1774533545"},{"product_id":"trace-minerals-liquid-d3-k2-59ml","title":"Ionic D3 + K2 – Liquid D3 \u0026 K2 – 59 ml","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eTrace Minerals Ionic D3 + K2 is a liquid combination formula of vitamin D3 (cholecalciferol) and vitamin K2 (menaquinone-7, MK-7) in a 59 ml dropper bottle. Per dose of 2 drops (0.1 ml), this product provides 62.5 µg of vitamin D3 (2,500 IU) plus 50 µg of vitamin K2 — a well-considered combination that supports calcium metabolism, bones, muscles, and the immune system. Liquid formula based on MCT coconut oil for good absorption of these fat-soluble vitamins. cGMP-produced in Ogden, Utah and independently lab-tested.\u003c\/span\u003e\u003c\/p\u003e","brand":"Trace Minerals","offers":[{"title":"Default Title","offer_id":56769629061465,"sku":"TRC6715","price":30.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/6127\/3177\/files\/trace-minerals-ionic-d3-k2-59-ml.jpg?v=1774527710"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/6127\/3177\/collections\/vitamine-d.jpg?v=1776070776","url":"https:\/\/www.plenthera.com\/en\/collections\/vitamine-d.oembed","provider":"Plenthera","version":"1.0","type":"link"}