How much is too much? Taking more than 500mg of vitamin C a day can be toxic. High doses of vitamin C will stop your body from absorbing nutrients and can cause severe diarrhoea. The British ...

How much vitamin C you need per day depends on your age, gender, whether or not you're currently pregnant, and if you smoke.

Nutrient deficiencies can cause various symptoms including headaches Here’s how to identify if your headache might be linked ...