For most people taking up to 100 micrograms (µg) equivalent to 4,000 international units) per day is considered safe. In a few people, taking too many vitamin D supplements over a long period of time can cause too much calcium to build up in the body (hypercalcaemia). This can weaken the bones and damage the kidneys and the heart. NHS.UK has more information about vitamin D, including advice on intakes. A low blood level of vitamin D is linked to a greater risk of fractures and falls, heart disease, multiple sclerosis, several cancers, and even death ( 8, 9, 10, 11, 12, 13). summary It’s not just us grown-ups that need vitamin D, our little ones could do with some of the sunshine vitamin too! The government recommends of a supplement of at least 10µg of vitamin D for children over the age of 1 and 8.5-10µg for babies under 1 year old. This helps them with everything from growing and maintaining healthy bones, teeth and muscles, to keeping their natural immune system functioning. But how? Choose child-friendly chewy gummiesor odour- and flavour-less drops for babiesand childrento make supplementing their vitamin D a little easier.

xiii] Al-Bayyari, N et al. “Vitamin D3 reduces risk of cardiovascular and liver diseases by lowering homocysteine levels: double-blinded, randomised, placebo-controlled trial.” The British journal of nutrition vol. 125,2 (2021): 139-146. doi:10.1017/S0007114520001890 Each ‘1-A-Day’ vitamin D supplement contains 10 micrograms (µg) of vitamin D. This is equivalent to 400 international units (IU) of vitamin D. This is the daily amount recommended for the general population by government for general health and in particular to protect bone and muscle health. formula-fed and are having less than 500ml (about a pint) of infant formula a day, as infant formula is already fortified with vitamin D Added colistimethate sodium (conversion to colistin base or vice versa). This conversion required in the case of inhalation administration of colistimethate sodium. The conversion works either in the direction of [IU of colistimethate sodium in mg/g of colistin base) or in the direction of [mg/g of colistin base in IU of colistimethate sodium]. Added translation and language selection for German (27%) and Dutch (16%). Thanks to all contributors!The Vitamin D Council considers these levels to be 'normal to high'. These vitamin D levels can be achieved by exposing the skin to adequate sunlight. As a result, it is assumed that these are natural, healthy levels. Your value is between 80 - 100 ng/ml In addition to strengthening and maintaining bones, vitamin D can potentially reduce certain people's chance of developing cancer and dying from it. It is an essential nutrient. But before researchers, physicians, and everyone else can make wise choices about boosting dietary consumption of the vitamin, further research on its other impacts is required. Deficient: levels less than 12 nanograms per milliliter (ng/mL), or 30 nanomoles per liter (nmol/L) However, it also reduces the body’s ability to make vitamin D3 from the skin, which can make you prone to deficiency ( 42).

People with the above conditions are often advised to take vitamin D supplements in an amount prescribed by a doctor. summary

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If you want to read more about vitamin D, we have a wealth of articles on our health hub such as what the difference is between vitamin D2 and vitamin D3, why vitamin D is important, which type of vitamin D is best for you, how much vitamin D you need, if you're getting enough vitamin D and how to identify vitamin D deficiency. If you are one of the following groups or have any of the following medical conditions, you should not opt in through this process and you should speak to your GP or healthcare professional at your next appointment. There are some groups who need to be particularly careful including those under the care of a renal, endocrinology or cancer specialist. This could include people with high vitamin D levels, kidney stones (now or in the past), too much parathyroid hormone (hyperparathyroidism), cancer (some cancers can lead to high calcium levels), severe kidney disease and a rare illness called sarcoidosis. How to store your vitamin D supplements Dietary folate can come in different forms: naturally occurring folates and synthetic folic acid. Previously all folates But between October and early March we do not make enough vitamin D from sunlight. Read more about vitamin D and sunlight.