Mushroom extracts, yes, are complementary therapy while doing chemotherapy…This is how Paul Stamets mother used them, & this is the basis for him evangelizing mushroom extracts & selling them…Whether it is every day or some days, is a personal choice…It also may depend on what chemotherapy is being done…If immunotherapy is being done, mushroom extracts will directly lessen their impact- which might be necessary & helpful…After doing high dose Carbons( like a baking soda protocol or senna leaf type teas, or if Downs syndrome is present or Carbon dioxide in excess type symptoms ( feeling stupid), Mushroom extracts boost neural growth too…Mushroom extracts also boost testosterone…Mycoplasma feed on nitrogens so if gastric cancer is present, not a good idea…