Why are there so many companies selling mycelium on grain (MOG)?

 MOG is actually nothing more than what commercial mushroom growers call “grain spawn”. Grain spawn is cheap to produce and is therefore economical to grow.

Unfortunately, mycelium grown on grain or rice contains minimal amounts of the important compounds that are in medicinal mushrooms.

Myceliated grain is cheap to produce, often cheap to purchase, but the lack of medicinal compounds makes it gram for gram the most expensive product on the market.