Body composition

Explore strategies for optimizing your ratio of muscle to body fat, including training approaches, nutrition tactics, and hormonal factors that influence how your body stores fat and builds lean mass.

BRI vs BMI for longevity: Why your waist may matter more than your weight

BRI vs BMI for longevity: Why your waist may matter more than your weight

Dr. Susan Carter, MD avatar
Dr. Susan Carter, MD: Endocrinologist & Longevity Expert
Jan 15, 2026 · 13 min read

BRI likely predicts longevity risk better than BMI for many men because it reflects abdominal fat distribution, not just weight for height. If your BMI is “fine” but your waistline is climbing, BRI can be the reality check that pushes you toward the right labs and the right plan. “For men, the big miss with ...

Should i lose weight before building muscle? A doctor’s guide for men who want results

Should i lose weight before building muscle? A doctor’s guide for men who want results

Dr. Susan Carter, MD avatar
Dr. Susan Carter, MD: Endocrinologist & Longevity Expert
Jan 11, 2026 · 13 min read

It depends on your goal and how much weight you need to lose, but most men do best by prioritizing fat loss while protecting or building muscle. If you have obesity, weight loss usually comes first for health and longevity, then you push harder on muscle gain once training feels better and safer. “The biggest ...

Can gut health help you lose weight? What men should know about the microbiome

Can gut health help you lose weight? What men should know about the microbiome

Dr. Susan Carter, MD avatar
Dr. Susan Carter, MD: Endocrinologist & Longevity Expert
Jan 09, 2026 · 11 min read

Improving gut health can support weight loss by strengthening appetite control, lowering inflammation, and improving metabolism, but it cannot replace a calorie controlled diet and consistent training. The upside is that a few evidence based moves can make your existing weight loss plan work better. “When a guy tells me he is doing the workouts ...

Does lifting weights burn fat? The science-backed answer for men who want visible results

Does lifting weights burn fat? The science-backed answer for men who want visible results

Dr. Bruno Rodriguez, DPT, CSCS avatar
Dr. Bruno Rodriguez, DPT, CSCS: Strength, Recovery, and Physical Therapy Expert
Jan 05, 2026 · 10 min read

Lifting weights can support fat loss by building and preserving muscle, which helps maintain a higher resting metabolic rate and improves body composition over weeks and months. Here’s how to set up your training and tracking so the mirror changes even when your workout isn’t “burning fat” in the moment. “If you’re asking ‘does lifting ...

What is biohacking? A doctor’s guide for men who want measurable health gains

What is biohacking? A doctor’s guide for men who want measurable health gains

Dr. Susan Carter, MD avatar
Dr. Susan Carter, MD: Endocrinologist & Longevity Expert
Jan 03, 2026 · 11 min read

Biohacking is the practice of using science, self tracking, and targeted lifestyle changes to improve healthspan and lifespan. For men, the best biohacking focuses on sleep, body composition, cardiometabolic health, stress hormones, and lab guided decisions you can actually sustain. “The best biohacking is not extreme. It is repeatable. If you can measure it, recover ...

Special OfferLab panels included: $300/year free for all members