Dr. David Williams in his newsletter suggests going back to the original product (yeast supplement for animals) and just purchase a 50# bag from a veterinarian and have enough for you, your family and all your relatives and friends for several years.
Since this is a bit difficult for most of us, Global Light has done it for us. They have a 1.2# container of the loose product--about a 5 month supply--for $22.
https://www.globallight.net/Diamond-V...ure-30-Oz.html
Another of my newsletters says it takes about 3 to 4 months to see the full protective effects of Epicor.
Mari