MetaboLys® by-pass lysine: a proven source of metabolizable lysine; proven effective; and proven economical. H.J. Baker’s experts in dairy feed ingredients developed a product that works … and then proved it. In a field trial measuring its effect (by David E. Weber, DVM, Thousand Hills Herd Services), the economic impact resulted in an additional $.16 over feed cost per cow, per day. With MetaboLys® by-pass lysine, the producer benefits, the nutritionist benefits, the farmer benefits and the cows benefit.