There currently is no set standard for mushroom supplement dosing. When you examine the literature dosages vary quite a bit.
We have seen research from 1g and up. It is important to factor in the preparation methods as some are just dried grain and mycelium, some are dried fruiting bodies, some are extracted fruiting bodies, some a dual extracted fruiting bodies, some are 1:1 extracts whereas others are concentrated - as you can see there are so many variables at play.
Our dosages were based on a combination of examining the literature and market research. We recommend a dose on each package, but often people will seek individual guidance from a qualified healthcare practitioner, as every person will have different needs.