Dr. Andy Galpin: Optimal Nutrition & Supplementation for Fitness | Huberman Lab Guest Series

In the sixth and final episode of the Huberman Lab fitness series, Andrew Huberman and Andy Galpin focus on nutrition and supplementation for performance and recovery. They cover Galpin's '80/20' high-impact low-cost supplements (creatine, beta-alanine, caffeine, beetroot), then go deep on hydration, electrolytes, and the 'Galpin equation' for fluid intake during exercise. The conversation moves through pre/intra/post-workout fueling, training fasted, stimulants and non-stimulant focus aids (Alpha-GPC, citrulline, rhodiola), and the three-phase recovery process with phase-specific supplements. A long section is devoted to sleep optimization and Absolute Rest's four-fold sleep diagnostic, followed by an audience Q&A on fasting, carbohydrates, garlic, tart cherry, and the anabolic window. Throughout, Galpin stresses single-ingredient formulations, third-party testing, and treating supplements as short-term tools while fixing root-cause foundational habits.

• Galpin recounts a female CEO whose brain fog, sleep, and focus problems were caused entirely by drinking 250-260 oz of water a day plus 8 coffees; cutting her water fixed everything.
  00:27:28
• Galpin claims watermelon is fine despite its sugar because it's ~95% water, predicting the comment will draw hate mail.
  01:00:42
• Crossing roughly 5 mg/kg of caffeine starts causing performance decrements; too much caffeine measurably worsens performance.
  01:28:21
• Galpin's number-one supplement rule for a decade: take single-ingredient supplements at all costs.
  01:43:59
• Off-the-shelf melatonin can contain 500-1000x the labeled dose; he sees people with 10-30x the upper limit the next morning.
  01:44:30
• Galpin's company Absolute Rest sends a team to your home to run multi-night clinical-grade sleep studies in your own bedroom.
  02:04:16
• Galpin says sleeping with a partner is genuinely bad for sleep, half-jokingly suggesting separate beds or sheets.
  02:13:37
• Curcumin can potently reduce DHT and flatline libido/drive in DHT-sensitive people, an effect that reverses after stopping.
  02:28:44

• As little as 2% body-weight loss from dehydration reduces accuracy (e.g. basketball free-throw shooting) and raises perceived exertion.
  00:23:20
• A normal overnight body-weight 'float' is about 1-2 pounds for a 170+ lb person, useful for triaging hydration vs sleep issues.
  00:35:16
• Sweat cools you only by evaporating off the skin; if you stop sweating you'll soon stop being able to keep moving.
  00:43:01
• The Galpin equation: drink body weight in pounds divided by 30 in ounces (or 2 mL/kg) of fluid every 15-20 minutes during exercise.
  00:50:22
• During hard long exercise, aim for ~60-100 g carbohydrate per hour, ideally a 2-3:1 glucose-to-fructose ratio via separate transporters.
  01:13:13
• Effective performance caffeine dose is 1-3 mg/kg about 30 minutes before exercise; the smallest commercial coffees contain 250-350 mg.
  01:26:43
• Huberman defines addiction as a progressive narrowing of the things that bring you pleasure.
  01:48:38
• CO2 buildup in a closed bedroom can disrupt sleep; the threshold was informed by data from the International Space Station.
  02:07:22
• Injury can raise basal metabolic rate by up to 10%, so Galpin recommends eating more, not less, while recovering.
  02:34:55
• Recovery 'remodeling' supplements include glutamine (~20 g/day), magnesium (~6 mg/kg), curcumin, vitamin D, and tart cherry juice.
  02:38:32

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