Metabolic Health

If you're a woman who feels wired but exhausted, foggy by mid-afternoon, and completely depleted by evening — there's a piece of your biology that rarely gets discussed, and it starts with light. Here's the mechanism: Inside nearly every cell in your body are mitochondria — tiny structures that turn the food you eat and the oxygen you breathe into usable energy. When your mitochondria are producing energy efficiently, you feel clear, capable, and steady. When they're not, you feel exactly the way so many women describe to me: depleted in a way that no amount of coffee or discipline seems to fix. What most people don't realize is how much your mitochondria depend on timing. Your body runs on a circadian rhythm — an internal clock set primarily by light. When morning sunlight reaches your eyes, it signals that clock to align your cortisol, your metabolism, and your cellular energy production for the day ahead. That same signal, hours later, helps set you up for the deep, restorative sleep where your mitochondria actually repair and rebuild. Skip the light, blur the timing, and the whole system drifts. Energy production falters. Sleep suffers. The fatigue and brain fog compound. And a standard lab panel will often tell you everything looks "normal." It isn't that nothing is wrong. It's that your body is asking for an input it hasn't been receiving. The encouraging part: light, timing, and circadian alignment are among the most accessible levers we have — and the science behind them is genuinely compelling. I experienced this firsthand working 24-hour-long shifts mostly in an operating room lit by LED, which doesn't provide our bodies with the biological signals they rely on. I'm teaching a workshop on exactly this — sunlight, mitochondrial health, energy production, and circadian rhythm — in my next women's group call on September 22 at 5 PM. If you'd like to join us, send me a message, and I'll share the link. …more

You are doing everything you are supposed to do. You are eating well. You are exercising. You are managing your workload and trying to keep your stress in check. And yet your body is changing in ways that feel beyond your control. Your energy is not what it was. Your clothes fit differently. Your recovery takes longer. Your brain feels slower, and the cognitive sharpness you have always counted on is just not there the way it used to be. When you ask your doctor, the answer is usually the same. Your labs are normal. This is just what happens in midlife. Maybe try cutting calories. Maybe add more cardio. Maybe accept that this is just aging. But here is what that conversation is missing: your body composition in midlife is not about willpower or calories. It is about hormones, stress physiology, mitochondrial function, and metabolic signaling. And the standard labs most clinicians run do not tell that story. Body composition science looks at what is actually happening beneath the surface. It measures lean mass, fat mass distribution, visceral adiposity, and metabolic health markers that reveal how your body is responding to the hormonal shifts of perimenopause and early menopause. It shows whether cortisol dysregulation is driving muscle loss. Whether insulin resistance is quietly building. Whether inflammation is changing how your body stores and uses energy. This is not vanity. This is metabolic health. This is biological age. This is the difference between operating at your best and spending the next decade managing symptoms. On April 23 at 6 PM Pacific, I am hosting a free webinar on women's body composition in midlife. I will walk through what is actually happening in your body during this transition, what the right data can reveal, and what becomes possible when you address the root cause instead of chasing symptoms. This is for women who want answers, not platitudes. Who want to understand their own biology at a deeper level. Who are ready to see what the data actually says and build a plan around it. Reserve your spot here: https://lizgreenfield.kartra.com/page/Womens-Body-Composition-Webinar-2026 …more