methionine,

dl-methionine cas 59-51-8 food grade
l-甲硫氨酸
life extension, same (s-adenosyl-l-methionine), 400 mg, 60
预订 methionine: biosynthesis, chemical structure.
现美国 now foods l-methionine左旋蛋氨酸500mg100粒胶囊