Now, researchers think that carnosine helps counteract all that acid build up in your muscles.

现，研究人员认为肌肽可以避免肌肉中堆积。

The culprit seems to be an amino acid in lots of pre-workout supplements called beta-alanine, which your body can use to make a molecule called carnosine, which hangs out in your skeletal muscles.

魁祸首似乎β-丙氨，种氨基，存于许多训前补剂中，你的身体可以用来形成种叫作肌肽的小分子，这种小分子存于骨骼肌中。