I truely believe there is something in the FF beyond the usual biotin/methionine that was missing in my horse's diet (before I discovered his IR status and corrected his diet) that drastically helped my gelding's hoof quality. Higher quality protein? A specific amino acid? Idk, but theres no doubt FF has helped this particular horse. (i tried streamlining diet by switching to Horsetech's Bioflax--ground flax plus comparable amts biotin/methionine but results after several months were quite disappointing)