Kotiba nadir

Dl and l methionine, is not equale. Because poultry dont use D forma, so they need to transforme D forma an L forma in liver, this use energie. And D format is about 50% of compositio' of Dl methionine. If poultry like Layer hen have probleme of stratose and liver deseas, it can be more D forma not used. So L methionine it easy and directe use.