Supplements don't boost your immune system ?

Like most pseudoscientific concepts, immune-boosting supplementation has a grounding in misunderstood science. Vitamins, especially A, C and D, and minerals such as zinc do have a vital role in the functioning of our immune system, but they are also practically unavoidable components of our diets, present in large quantities in fruits, vegetables and meats. If you have a normal diet, you don’t need supplemental vitamins or minerals, and giving more of them won’t help.

There is of course a way you can speed up this process and thereby boost your immunity. It’s called vaccination. Vaccines contain harmless versions of the bug you want to protect yourself against so that the acquired system can remember them and act more quickly the next time it meets them. Given that the supplements you buy in health food shops are not vaccines and thus can’t be helping the acquired system, they must therefore be aiming to boost the innate one, which would be far from ideal.