Nootropics
L-Theanine and Caffeine: Smoother Focus in Small Trials
Small randomized trials suggest 100–200 mg of L-theanine takes the edge off caffeine's jitters while keeping its focus benefits. The ratios studied, the doses used and the limits.

Digital guide
Evidence-based protocols for optimizing health
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PDF · 18 pages · about 26 min read · 20 references
Contents
Fit
Outcomes
“If someone claims a supplement produces dramatic, drug-like effects, they're either lying or describing an actual drug.”
Sample pages
Details
Not medical advice. The guide's own medical disclaimer (p. 1) says it is for educational purposes only and does not constitute medical advice, and asks you to consult a qualified healthcare provider before starting any supplement regimen, especially if you have existing medical conditions, take medications, or are pregnant or nursing.
Questions
Articles
Nootropics
Small randomized trials suggest 100–200 mg of L-theanine takes the edge off caffeine's jitters while keeping its focus benefits. The ratios studied, the doses used and the limits.
Hormones
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Foundations
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Longevity
NMN is sold as an anti-aging breakthrough. Oral NMN raises blood NAD+ in short human trials, but no study shows a longer or healthier life. What the evidence supports so far.
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