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

KEYPOINTS

• 01

  Bloodwork helps with lifespan but says little about healthspan

  Attia splits longevity into lifespan (not dying of the 'four horsemen': atherosclerotic disease, cancer, neurodegeneration and metabolic disease) and healthspan (cognitive, physical and emotional function). Biomarkers give decent insight into heart disease and Alzheimer's risk, which overlap heavily, but have a big blind spot for cancer and Parkinson's. Healthspan needs functional testing. He calls emotional health the piece without which none of the rest matters.

• 02

  Everyone should be screened for Lp(a) early

  Lipoprotein(a) is the most prevalent genetic driver of atherosclerosis. Roughly 8–12% of people (possibly up to 20%) have levels high enough to contribute to disease, yet most physicians do not check it. Because it is genetic, a single early test is informative.

• 03

  Plan from your 'marginal decade' backward

  Patients answer about 50 prompts describing what they want to be able to do in their last decade, such as picking up a great-grandchild or getting up off the floor. Attia then compares that with how strength and VO2 max decline with age. He borrows the term 'backcasting' from Annie Duke. Nearly everyone finds they need to be much fitter and stronger now than they assumed.

• 04

  Fitness and strength outweigh most other modifiable risk factors

  Smoking raises all-cause mortality risk by about 40% at any given moment (it does not shorten life by 40%). High blood pressure and type 2 diabetes each add roughly 20–25%, and end-stage kidney disease about 175%. By contrast, low versus high muscle mass is about a 3× hazard and low versus high strength about 3.5×. Bottom-quartile VO2 max versus the top 2.5% for one's age is roughly 5×, the strongest association he has seen for any modifiable behavior.

• 05

  Exercise is the most important thing for brain health, and the first dose matters most

  In the context of Alzheimer's prevention, Attia says going from sedentary to about 15 MET-hours a week (roughly three hour-long brisk walks) cuts risk by about 50%. More exercise still adds benefit at a slower rate, and it supports the functional, healthspan side that mortality data do not capture.

• 06

  Strength training is the best bone builder, especially before age 25

  His team expected running to win, but powerlifting came out best because muscles pulling on bone through tendons activate osteoblasts. Peak bone density is set in youth, which matters most for women. Heavy inhaled or oral corticosteroid use during that window can impair it. Attia tracks DEXA Z-scores; for example, he aims to move a −1 to 0 over four years even though bone density would normally decline.

• 07

  The WHI hormone-therapy scare rested on a misleading headline

  The trial enrolled women more than 10 years past menopause, without symptoms, and disproportionately unhealthy (he recalls about 40% were smokers). It used horse-derived conjugated estrogen and synthetic MPA instead of today's bioidentical estradiol patch and micronized progesterone. The reported 27% relative rise in breast cancer was an absolute change from 4 to 5 cases per 1,000, or 0.1%. Estrogen given without progesterone to women with a uterus does raise endometrial cancer risk.

• 08

  Testosterone therapy in men: modest doses, careful estradiol, and fertility first

  Attia's clinic uses lower, more frequent subcutaneous testosterone cypionate injections, once or twice a week with a small needle, and avoids pellets. About 20% of men need a micro-dose of anastrozole to keep estradiol at 30–50 pg/mL, and he never wants it below 25. Men who still want children are steered toward hCG alone because TRT lowers sperm count. He has stopped using Clomid after seeing it raise desmosterol, an unpublished clinic observation.

• 09

  ApoB is the causal lipid target, and diet alone rarely gets it low enough

  Atherosclerosis essentially cannot develop below about 20–30 mg/dL of apoB, a level most people pass by their teens. Cutting carbohydrates lowers triglycerides, but raising saturated fat can push apoB up. Drug options include statins (which in trials do not impair cognition), ezetimibe (better responders show high phytosterols), bempedoic acid (liver-only and fewer side effects) and PCSK9 inhibitors, the most potent.