Hitting your 40s can feel like your body is suddenly playing by a whole new set of rules. What used to work — cutting calories, skipping meals, doing more cardio — now leaves you tired, stressed, and stuck.

Intermittent fasting is everywhere. It’s promoted as a “miracle” for weight loss, longevity, and better health. But when it comes to women—especially those in their 30s, 40s, and 50s—fasting might be doing more harm than good.