Fertrell’s Original Poultry Nutribalancer is known throughtout the organic poultry industry as the go-to vitamin mineral supplement pre-mix. We have found none better, and we have tried. This product is without compare in our estimation and we use it exclusively here in our mill. The product contains methyonine, a synthetic digetive enzyme. Some organic certifiers allow it, some don’t. Always check with your certifier before using to make sure it is approved for your situation.