Dr. Susan Carter, MD: Endocrinologist & Longevity Expert

Metabolic confusion diet: Can calorie cycling help men lose fat without stalling?

Dec 14, 2025 · 12 min read

When weekly calories (and protein) are matched, calorie cycling (“metabolic confusion”) tends to produce fat loss similar to a steady daily deficit, but higher-calorie days may improve adherence and help manage diet fatigue tied to adaptive thermogenesis (a drop in resting metabolic rate during prolonged dieting). Here’s how to structure high- and low-calorie days so ...

How body fat speeds up aging in men: The science of metabolism and longevity

Dr. Susan Carter, MD: Endocrinologist & Longevity Expert

Dec 10, 2025 · 14 min read

In men, excess visceral (deep belly) fat speeds up aging by acting as an inflammatory endocrine organ that releases cytokines such as TNF-α and IL-6, driving chronic inflammation, insulin resistance, and faster atherosclerosis. Losing just 5–10% of body weight in midlife can measurably improve blood sugar, blood pressure, and inflammatory markers—making fat loss one of ...

Does testosterone increase metabolism in men?

Dr. Susan Carter, MD: Endocrinologist & Longevity Expert

Dec 09, 2025 · 12 min read

In men with confirmed testosterone deficiency, testosterone replacement can modestly increase metabolic rate over 6–12 months, largely by adding lean muscle (which raises basal metabolic rate) and reducing visceral fat. The biggest payoff shows up when strength training, protein intake, and sleep are dialed in—and men with normal levels usually see little metabolic benefit while ...

What is a red light therapy hat and should men use one for hair loss?

Dr. Susan Carter, MD: Endocrinologist & Longevity Expert

Dec 08, 2025 · 14 min read

If you are staring at your hairline in the mirror and wondering what is a red light therapy hat and whether it can save your fade, you are not alone. Here is how these glowing caps work, what the science says, and how to decide if one fits into your hair-loss game plan. “A red ...

Nature Made vs Centrum Men 50+: What science shows

Dr. Susan Carter, MD: Endocrinologist & Longevity Expert

Dec 08, 2025 · 14 min read

For most men over 50, the best multivitamin is a “50+” formula that omits iron and emphasizes vitamin D and B12 (which can absorb less efficiently as stomach acid declines) plus magnesium, calcium, and zinc for bone, muscle, and immune support. Here’s how to compare labels like Nature Made Men’s Multivitamin 50+ and Centrum Men ...