Which Form?

Caffeine

3.4

Moderate

consensus

Based on expert consensus data from publicly available videos, not medical advice. Always consult your healthcare provider before starting, stopping, or changing any supplement.

Available Forms

  • Filtered coffee is optimal for health benefits — paper filters remove cholesterol-raising diterpenes while preserving polyphenols (Patrick)
  • Medium roast Arabica beans from high-altitude origins offer the highest antioxidant content (Patrick)
  • Yerba mate is an alternative that upregulates dopamine receptors and stimulates GLP-1 (Huberman)
  • L-theanine (100-200mg) can be added to coffee to reduce jitters and enhance cognitive benefits without compromising sleep (Patrick)

Dosage & Timing

Dosage

  • 1-3mg per kilogram of body weight for general alertness and performance (Huberman)
  • 3-6mg/kg body weight for peak physical or cognitive performance, consumed 45-60 minutes before activity (Patrick)
  • Up to 400mg daily is considered safe for most adults (Attia)
  • Johnson takes zero caffeine

Timing

  • Delay intake 90-120 minutes after waking to allow natural cortisol pulse to clear residual adenosine and prevent afternoon crashes (Huberman)
  • Cut off all caffeine 8-12 hours before bedtime (Huberman, Attia)
  • Attia recommends no caffeine after 11:00 AM
  • Morning-only consumption aligns with circadian biology and offers the greatest longevity benefits (Patrick)
  • Caffeine consumed after a learning session can enhance memory consolidation (Huberman)

Expert Positions

Andrew Huberman
Andrew Huberman
Strongly Recommends (With Timing Rules)
Peter Attia
Peter Attia
Recommends With Strict Timing
Rhonda Patrick
Rhonda Patrick
Strongly Recommends for Longevity
Bryan Johnson
Bryan Johnson
Avoids Entirely
Mark Hyman
Mark Hyman
Cautious — Recommends Elimination for Some

What Each Expert Says

Andrew Huberman
Andrew Huberman
Strongly Recommends (With Timing Rules)

Huberman is the most prolific source on caffeine, discussing it across 30+ videos with a dedicated episode (Podcast #101) covering caffeine as a reinforcer, its mechanisms of action, optimal dosing and timing, effects on learning and exercise, and an every-other-day protocol. He consistently recommends delaying caffeine 90-120 minutes after waking, dosing at 1-3mg/kg body weight, and cutting off 8-12 hours before bed. He frames caffeine as both a stimulant and a reinforcer that shapes behavioral preferences. Across his Matt Walker guest series, he explores caffeine's adenosine-blocking mechanism and its impact on sleep architecture. In his dopamine episodes, he highlights yerba mate's ability to upregulate dopamine receptors and provide neuroprotection. He also covers caffeine's role in headache management, fat oxidation, and cognitive enhancement.

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