You need 13 vitamins to maintain health, but should you take any of them in supplement form? Do you need to top up your vits every day? There are two types of vitamins: fat-soluble and water-soluble.

Although your body will store excess vitamin A, some research shows having more than 1.5mg a day over many years may weaken ...

Health care professionals need to keep in mind that in general, 100 IU (2.5 mcg) of vitamin D per day can raise the vitamin D blood test only 1 ng/ml or just 2.5 nmol/L after 2 to 3 months.

The best time to take vitamin B12 depends on why you are taking it and in what form. Learn the best timing for your needs.