Perimenopause can feel chaotic: hormones shifting, mood swings, hot flashes, sleep disruption, brain fog, metabolic shifts, inflammation, and more. Most people — including many doctors — treat it like a hormone problem. But emerging science suggests a deeper truth: perimenopause may also be a circadian-rhythm crisis . Our internal biological clock — the “circadian rhythm” — governs virtually every system in the body. When that clock gets scrambled, perimenopausal symptoms oft