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

现在，研究人员认为肌肽可以酸在肌肉中堆积。

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.

魁祸首似乎是β-丙酸，它是基酸，存在于许多训前补剂中，你的身体可以用它来形成叫作肌肽的小分子，这小分子存在于骨骼肌中。