Even if these vitamins do pass through the skin ... the evidence that it will actually work is incredibly low.” ...

One of the biggest reasons as to why Vitamin D supplements don't appear to work is bioavailability-that ... feel that any amount of Vitamin D will do, but the reality is that the dosage taken ...

I spent four months testing vitamin C products and interviewing skin-care experts about how they work. All the doctors I spoke with considered a stable form of vitamin C a must-have for any ...

So do these hair growth supplements really work? Such supplements often contain vitamins (like biotin and vitamins A, C and D), minerals (like zinc and selenium) and extracts from plants including ...

But it is wrong to assume that food supplements do not sometimes have the potential to be harmful, says Dr Wayne Carter, from the University of Nottingham. If you take supplements in quantities ...