两种补充剂的故事：肌酸与亚甲蓝

A Tale of Two Supplements Creatine builds muscle, but methylene blue doesn’t boost the brain BY LYDIA DENWORTH M Y HUSBAND, a fitness fanatic, drinks powdered creatine mixed in water every day. “There’s good evidence it helps to build muscle,” he tells me. I took up strength training two years ago, so I’m interested. But I’m also a science journalist, and I’m suspicious of claims about supplements, especially social media favorites such as creatine. Lots of supplement tests are poorly done, and the pills and powders are not held to the same standards as governmentapproved medications. I wondered what evidence Mark, my generally sharpminded husband, was talking about. …