He says 3 grams a day TO START is a good therapeutic dose!!! He said you can take as much as you want because you probably eat more than that on your pizza! Makes sense, it IS food after all!
Actually that is misleading. Not all mushrooms are the same. The button mushrooms they put on pizzas are worthless as medicine since they have virtually no immune stimulating polysaccharides. It is like comparing bottled water to toilet water and saying they are just as good since they are both water.