Reviewed by Helen Kollias, PhD and Brian St. Pierre, MS, RD At some point in my mid-40s, the scale started climbing. A pound or two turned into five, then 10, then 20. It seemed as if I was doing all the right things: Eating less, moving more, rinse, repeat. Yet, the harder I worked, the less the scale seemed to respond. Had perimenopause destroyed my metabolism? It sure felt like it. However, after asking my doctor to run a series of tests, I learned that my metabolism was, in fact, fine. Instead, like the vast majority of midlife women, the…

Reviewed by Denise Asafu-Adjei, M.D., MPH A few years back, PN co-founder John Berardi, PhD, posted a shirtless photo of himself on his 47th birthday. He called it his “anti-regress pic” and thanked 30 years of squats, deadlifts, presses, and chin-ups—among other exercises—for his chiseled six-pack, pumped chest, and bulging biceps. The question many commenters posed: “Are you on testosterone?” Dr. Berardi explained in a follow-up post that while he wasn’t against testosterone replacement therapy (TRT) for people who needed it, he himself was not on this therapy, and his testosterone levels were boringly “normal.” He also offered some thought-provoking…