You're eating well. You're going to bed at a reasonable hour. You've cut back on wine, and you're trying to manage your stress. So why do you still feel like you've been hit by a truck? Here's something most women in perimenopause don't hear: it might not be what you're eating. It might be cortisol and the way perimenopause changes how your body handles it. The Short Answer Cortisol, your body's primary stress hormone, becomes harder to regulate when estrogen starts to decli