Researchers measured acetylcholine production in participants' brains at the beginning and end of the 10-week trial.

Acetaminophen has been available since the 1950s and in everyone’s medicine cabinet for so long that some of us treat it as a part of a food group. Now, surprisingly, it’s in the news. Much has ...

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EDITOR’S NOTE: Chief Medical Correspondent Dr. Sanjay Gupta’s new book, “It Doesn’t Have to Hurt,” is available now. Watch “Dr. Sanjay Gupta Reports: It Doesn’t Have to Hurt.” at 9 p.m. ET on ...