The Kōjō Journal

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L-theanine and caffeine: why the combination outperforms either alone

March 22, 2026

Rhodiola rosea: the adaptogen with the strongest evidence

March 22, 2026

The case for phosphatidylserine: why your brain needs specific fats

March 22, 2026

Why standard supplement dosing is designed to keep you buying, not to keep you healthy

March 22, 2026

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