Exercise, Nutrition, Hormones for Vitality & Longevity | Dr. Peter Attia

Attia frames blood work around two goals: reducing risk from atherosclerosis, cancer, neurodegeneration, and metabolic disease (lifespan), and supporting cognitive, physical, emotional function (healthspan). For cardiovascular and dementia risk, he prioritizes ApoB (key atherogenic particle), LP(a), markers of insulin resistance, inflammation, and lipids over routine, shallow panels. Everyone should know LP(a) at least once early in life, since it’s genetically set and drives early atherosclerosis in 8–20% of people. Frequency of labs should follow interventions: if you’re changing drugs, diet, or training, expect 2–4 blood draws per year; not “annual labs by default.”

Attia considers standard weight and BMI crude. A DEXA scan gives four crucial data streams: total body fat, bone mineral density (BMD), visceral fat, and lean-mass indices (appendicular lean mass and fat-free mass index). For health and longevity, BMD, visceral fat, and lean mass are more important than percent body fat. Low BMD massively increases morbidity after fractures (30–40% one-year mortality after hip fracture over age 65), especially in postmenopausal women. Annual DEXA plus simple weight tracking provides a far more actionable picture than daily scale readings.

Low muscle mass and especially low strength are associated with roughly a 2–3.5x higher all-cause mortality compared to high strength. Cardiorespiratory fitness is even more powerful: being in the top ~2.5% VO2 max for your age and sex can yield about a 5x lower all-cause mortality risk than being in the bottom 25%. Attia’s practice uses concrete tests—dead hangs, farmer’s carries, squats, VO2 max—to quantify this. He argues exercise benefits brain health as much as body health, with strong evidence for dementia and Alzheimer’s risk reduction, driven via BDNF, vascular health, metabolic improvements, and direct brain effects.

Attia has patients define their “marginal decade”—the last 10 years of life—and describe, in detail, what they want to be able to do (play on the floor with grandkids, travel, carry groceries, hike, toilet independently). He then backcasts: maps the VO2 max, strength, stability, and bone density required at 80–90, then works backward by decade to what’s needed at 40–50. Because VO2 max and strength decline ~8–10% per decade, most people are already behind. This framework makes the need for aggressive training now concrete and personal instead of abstract “healthy aging” advice.

Attia calls the fallout from the Women’s Health Initiative (WHI) “the biggest screw-up” in recent medicine. WHI used older, sicker women, started hormones >10 years after menopause, and used conjugated equine estrogens plus synthetic progestin (MPA), then overhyped a small relative breast cancer risk (~25% relative, ~0.1% absolute). In contrast, Attia supports carefully monitored, earlier-started HRT with transdermal bioidentical estradiol plus micronized progesterone when the uterus is intact, with regular pelvic ultrasound and Pap screening. Benefits include relief of vasomotor symptoms, preservation of bone density, improved cardiovascular risk markers, and potentially cognitive benefits.