Study
Seven-day final-meal timing experiment
NEW 7-day N=1 experiment: Bryan Johnson is testing a 4-hour gap between his final food and bedtime. He tracks mood, willpower, and sleep; no outcome data yet.
On 10 August 2026, Bryan Johnson started a 7-day test of eating his final food 4 hours before bed. The post does not give a baseline, sample size beyond his own case, meal composition, bedtime, adherence method, or measurement plan. It names 4 outcomes: mood, willpower, sleep, and appearance. The current protocol page already recommends a last meal at least 2 hours before bed and says to experiment with 4 and 6 hours. This post turns the 4-hour option into a short public challenge. It is a protocol test, not evidence that a 4-hour cutoff improves health. The post supplies no results, no comparator, and no validated scales. His earlier protocol text claims that late food raises his pre-bed resting heart rate and worsens sleep, but those are his own observations. A future update would need dates, adherence, sleep measures, and a prespecified comparison to say more. Until then, the only firm finding is that he announced a new 7-day n=1 trial. The claimed benefits remain untested.
it will boost mood... strengthen will power... improve sleep ... make you hot
No critic piece found this week tested the 4-hour cutoff. Inga-Britt Pinkstone argued that rigid optimization routines can reduce flexibility and social contact; that is a social critique, not a test of meal timing.
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