#health

Explains the biology behind so-called 'old person smell': a compound called 2-nonenal produced when skin oils oxidize with age, starting as early as 40 and increasing gradually. Also covers why the odor isn't as unpleasant as the stereotype suggests, and what (little) can be done to manage it.

Peter Attia lays out a five-question framework (mechanism, human evidence, safety/dosing, risk-benefit, better-characterized alternatives) for evaluating any peptide, then applies it to BPC-157 and CJC-1295 to show why gray-market peptide claims tend to expand over time instead of narrowing, unlike legitimate drug development.

Healthcare Triage (in partnership with AcademyHealth) breaks down why US health care spending, at about 18% of GDP and nearly double many peer countries, keeps rising: not one villain but a stack of higher prices, rising utilization of new treatments added on top of old ones, coverage gaps, administrative overhead, and underfunded chronic-disease prevention.

Peter Attia distills 30+ hours of prior expert interviews into a single AMA covering why muscle strength predicts mortality more reliably than muscle mass, how to apply progressive overload, protein intake targets, and programming frameworks for beginners through seasoned lifters.

Epidemiologist Katelyn Jetelina breaks down BPC-157, TB-500, and the peptide boom — what the science actually shows (mostly animal studies), the regulatory whiplash after RFK Jr.'s Rogan appearance, and why people skeptical of vaccines embrace compounds with even less human evidence.

The asymmetry framing is sharp — the same post hoc fallacy that drives vaccine skepticism ("got the shot, then got sick") gets applied in reverse for peptides ("injected it, tendon healed"), but without the control group skepticism. Worth noting: RFK Jr.'s Rogan announcement in February 2026 changed no FDA rules — as of publication, compounding peptides like BPC-157 remained legally restricted.

Allergist Dr. Prathyusha Savjani explains why oral antihistamines fall short for seasonal allergies — they block histamine but not the inflammation caused by leukotrienes and prostaglandins. Better approach is nasal steroid sprays (Flonase) combined with saline rinses, with immunotherapy as the long-term fix.

Reframed how I think about allergy treatment — oral antihistamines feel like the obvious first move but they're actually pretty limited. The real work is reducing pollen exposure first, then treating inflammation with nasal steroid sprays and saline rinses, with antihistamines only if symptoms persist.

On "frontal fatigue" — how modern life (digital tech, decision overload, the loss of tradition as a guide) is stressing the prefrontal cortex in historically new ways, and what primary sensory experiences can do to restore it.

First time hearing about PFC dysfunction as a framing. The three red flags are useful — attention span collapsing, tip-of-the-tongue word loss, and surprising irritability — all signs the PFC is overtaxed, not just tiredness.

via #403 ‒ Peptides: separating scientific promise from marketing hype

via How to Give Your Exhausted Prefrontal Cortex a Break — Markham Heid