s overfertilization of the soil. Evonik markets all four major essential amino acids for animal nutrition, i.e. DL- methionine (MetAMINO1, L-lysine (Biolyse), L-threonine (ThreAMINO@) and L-tryptophan (TrypAMINO1. Evonik also produces amino acids and their derivatives in pharma- ceutical quality for use