van Ballegooijen AJ, et al. (2017). The synergistic interplay between vitamins D and K for bone and cardiovascular health: A narrative review. Balachandar R, et al. (2021). Relative efficacy of vitamin D2 and vitamin D3 in improving vitamin D status: Systematic review and Meta-analysis. Children with severe vitamin D deficiency usually take a loading dose for 8 to 12 weeks. They may then take a lower, maintenance dose of vitamin D long term. Your child's doctor may recommend changes to your child's diet to improve their vitamin D levels. If changes to their diet still do not provide enough vitamin D then the doctor may prescribe a maintenance dose of 400IU to 600IU for them to take daily long term. Prevention doses for children

For adults, if you're taking a loading dose for severe vitamin D deficiency you'll usually take it daily or weekly for 6 to 10 weeks. He S, Hao X. The effect of vitamin D3 on blood pressure in people with vitamin D deficiency: a system review and meta-analysis. Medicine (Baltimore). 2019 May;98(19):e15284. doi:10.1097/MD.0000000000015284 If you forget to take your daily or weekly dose of colecalciferol, take it as soon as you remember, unless it's nearly time for your next dose. In this case, leave out the missed dose and take your next dose at the usual time.Lower doses of colecalciferol are usually taken to maintain your vitamin D levels or prevent you from getting vitamin D deficiency. Dosage and strength Vitamin D3 is an essential nutrient for general health. It is called the sunshine vitamin as we would normally produce it when exposed to sunshine. Long hours spent indoor, high use of sunscreens and winter time, are all factors that can contribute to Vitamin D deficiency. taking a vitamin D supplement in it active form of D3 (cholecalciferol), is essential to maintain good level of this key life enhancing nutrient. Especially during cold wintery months where we are also more exposed to cold, flu and other infections. Nourish your natural immune defences with the help of NaturesPlus® Immune Vitamin D3, delivering this key nutrient to support overall immune system health.* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease. Immune Vitamin D3 is emulsified to provide easy-to-absorb microparticles, and combined with mineral salts to help further enhance its absorption and activity. * These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.Vitamin D contributes to the normal functioning of the immune system Meet the Experts: Arielle Levitan, M.D. is the author of The Vitamin Solution . Frances Largeman-Roth, R.D.N., is a nutrition expert and author of Smoothies & Juices: Prevention Healing Kitchen. Jinan Banna, R.D., Ph.D. is an associate professor of nutrition at the University of Hawaii at Mānoa. We updated this article in November 2022 to add more information about each featured product, based on extensive research done by our team. Marcinowska-Suchowierska E, Kupisz-Urbańska M, Łukaszkiewicz J, Płudowsk P, Jones G. Vitamin D toxicity–a clinical perspective. Front Endocrinol (Lausanne). 2018;9:550. doi:10.3389/fendo.2018.00550

Esposito S, et al. (2019). Vitamin D and growth hormone in children: A review of the current scientific knowledge. It is safe to take vitamin B12, vitamin D, and magnesium together. Meanwhile, taking vitamin D with a fat-containing meal can help optimize absorption. What are the best vitamin D foods?If you forget doses often, it may help to set an alarm or make a note in your diary to remind you. You could also ask your pharmacist for advice on other ways to help you remember to take your medicine. If you take too much

vitamin D3, if you can. If you see vitamins D2 and D3 on the store shelf, go with the latter. “Both vitamin D2 and vitamin D3 increase levels of the vitamin in the blood, but D3 might lead to a greater and longer increase than D2,” explains Jinan Banna, R.D., Ph.D., associate professor of nutrition at the University of Hawaii at Mānoa. As well as these capsules, we also have some that are suitable if you’re on a plant-based diet. Our Vegan Vitamin D3softgels are made from lichen algae. If you’re looking to get more calcium into your diet, we’ve also got a Calcium & Vitamin D3supplement — which deliver 100% of your recommended daily intake. It’s super-important to stay topped up on vitamin D, and our capsules give you a really convenient option when you can’t get enough from your diet and the sun alone. What are the benefits of vitamin D3?However, levels of this serum are higher and present in the body for longer with D3 than with D2. This may mean a person has a lower risk of a deficiency if they take D3 supplements. Geddes JAA, Inderjeeth CA. Evidence for the treatment of osteoporosis with vitamin D in residential care and in the community dwelling elderly. Biomed Res Int. 2013;2013:463589. doi:10.1155/2013/463589

Webb, A. R., et al. (2018). Colour counts: Sunlight and skin type as drivers of vitamin D deficiency at UK latitudes. Healthline has strict sourcing guidelines and relies on peer-reviewed studies, academic research institutions, and medical associations. We avoid using tertiary references. You can learn more about how we ensure our content is accurate and current by reading our editorial policy. Dietary supplements: Supplements contain vitamin D2 or D3. While the way the body processes these in the same way, vitamin D3 may increase the amount of serum 25(OH)D for longer than vitamin D2. Low amounts of this serum can indicate a risk of vitamin D deficiency. US Preventive Services Task Force, et al. Screening for vitamin D deficiency in adults: US Preventive Services Task Force recommendation statement. JAMA. 2021;325(14):1436-1442 . doi:10.1001/jama.2021.3069 As the NIH notes, people require different amounts of vitamin D at different ages. The recommended dietary allowances (RDAs) are as follows:t go dose crazy. More isn’t always better, and very high amounts (think, more than 4,000 IU daily) can actually be toxic. “Most people do well between 800 and 2,000 IU daily,” Dr. Levitan says. Your doctor can help you decide the right amount for you based on a current blood test.