[rumen-protected methionine] Mepron is the brand name for a time-released, rumen-protected DL-Methionine capsule for dairy cattle. It is a registered trademark of Evonik Industries. == Product == The product is a 1.8 mm x 3 mm, nearly-white cylindrical granule. The granules are free-flowing, and nearly insoluble in water. The product is nea... Found on http://en.wikipedia.org/wiki/Mepron_(rumen-protected_methionine)