The Powerful Impact of Morning Light on Cortisol & Alertness

About this video

Huberman argues most people miss the benefit of early morning bright light, relying instead on a phone or a few indoor lights. Huberman says that is not sufficient to boost cortisol as needed for mood, focus, and alertness, and recommends sunlight or a 10,000 lux artificial source. He says the effect on cortisol is significant and can help offset seasonal and mild depression, malaise, and low daytime energy.

Key takeaways

• Huberman recommends bright light early in the morning from sunlight or a 10,000 lux artificial source.
• Huberman says phone use and ordinary indoor lights are not sufficient to boost morning cortisol as needed.
• Huberman says morning light can improve mood, focus, alertness, and daytime energy.

Episode details: published August 8, 2025 · 164.6K views · 0:53 long. Summary written by Self Growth Videos from the episode itself. The science and protocols described are Andrew Huberman’s, presented for education — not medical advice. Consult a qualified professional before changing your own health practices.

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