Sam Altman Stares Into a Bright Light Every Morning and Fasts 15 Hours a Day. Here’s Why

Sam Altman, the CEO of OpenAI, starts many mornings by spending about 10 to 15 minutes under a full-spectrum LED light while clearing email, a routine he once called “a ridiculous gain for me.” A 2026 BBC Science Focus Magazine comment piece also notes that Altman typically fasts around 15 hours a day and takes […]

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