For example in a recent study into Ginkgo Biloba over 100 samples from different suppliers were tested for the active ingredient against the label amount and it produced a worrying picture. Some had 400% more than was stated on the label and sadly some had none. Now you might think that 400% is good value but in fact 400% might be harmful and it might be a waste of money.

So check out your supplements to see if they are standardised – if not caveat emptor – or buyer beware.