Stamet’s lions main product has clearly helped me a lot. Although, my former epilepsy does make me a special case. Namex makes a Fruiting Body based powder which I’m sure is very good. They claim that selling mycelium is a scam to trick customers into buying a product which is mostly rice. This doesn’t seem plausible to me because lion’s mane is not expensive to produce and Stamets is so passionate he would add it to the water supply if we would let him. Perhaps let your husband pick the brand he likes and see if you feel better? If not try the host defense one before giving up on the project. A little extra working memory and verbal recall goes a long way!