Vitamin A, also known as retinol, has several important functions ... A source of vitamin D is dietary supplements. Vitamin D is also found in a small number of foods, such as: oily fish ...
Vitamin D supplementation—especially in people who are deficient—has been shown to protect against acute respiratory tract infection. Keep in mind that the Food and Drug Administration (FDA ...
Breastfed babies should also have between 8.5-10mcg a day. Babies on formula milk don't need an additional supplement as formula already contains vitamin D. You can find out more in our guide to ...