Don't be deceived by the online marketing and anekdotes - mushroom extracts are not magic cures. Premium extracts do cover a very wide spectrum though, and they can help you to gain and maintain good health and to slow down the effects of aging and stress in particular.
In combination with regular treatment, mushroom extracts can often help to improve the positive effects of that treatment and to minimise side effects. In some cases they can even replace the regular treatment. In general mushroom extracts do not have side effects themselves - they are nutraceuticals, meaning 'food with therapeutic potential'. People in general experience no side effects when consuming their food, but as usual, there are always some exceptions.