PS: If you go my route, then eschew the white man’s store, and get it at the Indian store.
It costs about one twentieth there what an equivalent amount would cost at the white man’s store. I get it in 1 lb bags for about $7.
If people want to take it in capsule form empty capsules can be bought by the 1,000s for relatively cheap. A cheap gizmo for filling them can be bought for around $15. One can fill 45 of them at a time easily.