Butterfat punika triglyceride (lemak) asalé saka asam lemak kayata myristic, palmitic, lan asam oleic. asam kebak lemak: asam Palmitic: 31% asam Myristic: 12% asam stearic: 11%
Ing istilah prasaja, Amasi punika fermentasi bakterial susu kang asring legi utawa roso.