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Bryan Johnson@bryan_johnson5 months ago

While global sperm health is plummeting, my sperm count is over 4× the average. At age 47. Global data from 1973 to 2018: + sperm concentration declined by 51% + total sperm count declined 55% My sperm concentration (143 million) and count (380 million) both exceed 1973 levels demonstrating you can maintain high fertility in the modern world. Semen quality is a real-time readout of your biological age. ⬇️ My sperm health protocol

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4/30/2025
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Bryan Johnson@bryan_johnson5 months ago
Replying to @bryan_johnson

Semen quality isn’t just about reproduction. It’s one of the clearest biomarkers of systemic aging: tightly linked to hormone health, inflammation, mitochondrial function, and metabolic fitness. Across five lab tests in 3 months, my total motile sperm count (TMC) averaged 165 million, more than 4 times the WHO threshold for natural fertility (40 million). My peak: 214 million. Average sperm markers for a 45 yr old: + Swimmers. Typical = 80 million. Mine = 165 million. + Motility. Typical = 35%. Mine = 43%. + Morphology. Typical = <5%. Mine = 8%. My numbers consistently exceeded those averages by 2-4x.

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4/30/2025
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Bryan Johnson@bryan_johnson5 months ago
Replying to @bryan_johnson

Protocol for optimal sperm health: + Sleep: 8+ hours nightly + Reduce inflammation: omega-3s, NAC, exercise + Avoid testicular heat: no saunas (or sauna with an testicular ice pack), tight underwear, or laptops + Eliminate toxins: alcohol, cigarettes, plastics + Train hard: boost VO₂ max, lift weights + Track: Testosterone, SHBG, LH, CRP + semen quality

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