In some countries, vitamin D is listed in micrograms, and the relationship is as follows: 2.5 mcg (micrograms) = 100 IU. 5 mcg = 200 IU. 10 mcg = 400 IU. 15 mcg = 600 IU. 20 mcg = 800 IU.

Learn about the best time of day and way to take vitamin D and if you should consider a supplementing with this nutrient.

Both vitamin D and magnesium support physical and mental health, help to keep your bones strong, and may play a role in ...

This is typically caused by taking too many vitamin D supplements. For adults aged 19 and up, for example, 100 mcg (4,000 IU) is the daily upper limit for vitamin D from all sources, including ...

The NHS has issued a health alert, advising the public to start taking a 2p pill daily from this month to boost their wellbeing and potentially stave off serious health issues including dementia.

The NHS has issued a reminder to the public that they should be taking a 2p pill every day from this month - and it can have ...

A 21-year-old man or women exposed to summer UVB light generates 10,000 IU (the equivalent of 250 mcg, 25 multivitamin pills of vitamin D, or 100 glasses of milk) of vitamin D in 15 to 20 minutes.