Iron supplements are particularly infamous for causing constipation, nausea, and stomach pain. Vitamin C in high doses can ...

Discover how exceeding 2,000mg of vitamin C daily triggers digestive distress, kidney stones, and other surprising health ...

Knowing which vitamins you need can be pretty confusing. Here, experts detail which vitamins you should take daily and how to ...

Does taking vitamin C really make a difference to winter colds and flu, or does it just empty your wallet? Niki Bezzant investigates.