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Supplements43 mentions

Use caffeine as an acute performance aid, especially before early training or on days when you need a boost. A common effective range is about 1–3 mg/kg per dose, starting lower if you’re not accustomed to it; around 3 mg/kg is often cited for exercise performance. It works by increasing arousal, motivation, and focus, but it’s best used selectively rather than every workout to preserve sensitivity.

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Well it turns out that regular ingestion of caffeine at safe and appropriate levels about 100 to 250 milligrams is going to increase the number of D2 and D3 dopamine receptors

Andrew Huberman · Control Your Brain Chemistry for Focus, Motivation & Well-Being | Huberman Lab Essentials · Aug 6, 2026 · 11:35 · YouTube ↗
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