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Theacrine (TeaCrine) is a purine alkaloid structurally similar to caffeine, found naturally in Camellia kucha tea. It provides clean, long-lasting energy without the tolerance buildup, jitters, or crash associated with caffeine.
Common Dose
200mg
Dose Range
100–300mg
Frequency
once daily
Half-Life
20 hours
Onset
30 min
Duration
8 hours
Cycling
Not required
Legal Status
legal
Theacrine activates adenosine A1 and A2A receptors (inverse agonism) and dopamine D1/D2 receptors. Unlike caffeine, it does not produce tolerance due to its unique receptor binding profile.
Neurotransmitter Pathways
⚠️ Start low and increase gradually. Individual responses vary.
Potential Side Effects
Contraindications
Drug Interactions
"Highly rated as a caffeine alternative. Users love that it does not build tolerance."
Based on analysis of r/Nootropics, r/StackAdvice, and r/biohackers
Theacrine: a purine alkaloid with unique pharmacology
2016 — Pharmacology & Therapeutics
No tolerance development after 8 weeks of 300mg/day.
PubMedNo cycling required — can be taken daily.
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