THEACRINE
A purine alkaloid structurally similar to caffeine found primarily in Camellia kucha tea that provides sustained energy, focus, and mood enhancement without the tolerance buildup associated with caffeine.
Theacrine (1,3,7,9-tetramethyluric acid) is a purine alkaloid structurally similar to caffeine that acts as an adenosine receptor antagonist. It is found naturally in Camellia kucha tea and certain fruits, and is valued for its ability to enhance energy, focus, and mood without causing the habituation or tolerance typically associated with caffeine.
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Research
Reported Effects
Individual Variation:: Effectiveness appears highly variable between individuals, with some experiencing clear benefits while others notice minimal or no effects. Synergy with Caffeine:: Most consistent positive reports come from users combining theacrine with caffeine, where it appears to smooth out caffeine's effects and extend duration. Subtle vs Pronounced:: Effects are generally described as subtle rather than dramatic, leading some users to question cost-effectiveness compared to caffeine alone. Timing Sensitivity:: Research suggests consumption within 8 hours of bedtime may enhance next-morning cognitive performance without significantly disrupting sleep
- Effectiveness appears highly variable between individuals, with some experiencing clear benefits while others notice minimal or no effects
- Most consistent positive reports come from users combining theacrine with caffeine, where it appears to smooth out caffeine's effects and extend duration
- Effects are generally described as subtle rather than dramatic, leading some users to question cost-effectiveness compared to caffeine alone
- Research suggests consumption within 8 hours of bedtime may enhance next-morning cognitive performance without significantly disrupting sleep
Safety Profile
Safety Profile: Theacrine
Common Side Effects
- Generally well tolerated at typical doses (100–300 mg/day); structurally related to caffeine but with less tolerance development
- Mild jitteriness, restlessness, and nervousness at higher doses
- Insomnia or sleep disturbances when taken late in the day
- Mild gastrointestinal discomfort including nausea and stomach upset
- Elevated heart rate and mild blood pressure increases, typically less pronounced than caffeine
Serious Adverse Effects
- Limited long-term safety data in humans; most clinical studies are short-term (8 weeks or less)
- Cardiovascular effects at high doses: tachycardia and palpitations possible, though generally milder than with equivalent caffeine doses
- No significant hepatotoxicity or nephrotoxicity reported in available human studies
- Theoretical risk of adenosine receptor desensitization with chronic high-dose use
- A 60-day open-label study at 300 mg/day showed no adverse changes in hematological, hepatic, or renal biomarkers
Contraindications
- Known hypersensitivity to theacrine or purine alkaloids
- Severe cardiovascular disease, uncontrolled hypertension, or arrhythmias
- Concurrent use of high-dose caffeine or other stimulants (additive effects)
- Pregnancy and lactation (insufficient safety data)
- Anxiety disorders (may exacerbate symptoms despite lower anxiogenic potential than caffeine)
Drug Interactions
- Caffeine and other stimulants: Additive stimulatory and cardiovascular effects; many supplements combine the two, but total stimulant load should be monitored
- Adenosine (pharmaceutical): Theacrine is an adenosine receptor antagonist; may reduce efficacy of adenosine used in cardiac stress testing or SVT treatment
- MAO inhibitors: Theoretical interaction given purine alkaloid structure; exercise caution
- Lithium: Stimulants may affect lithium clearance; monitor lithium levels
- Anticoagulants: No known direct interaction, but limited data
Population-Specific Considerations
- Elderly: Use lower doses; monitor cardiovascular parameters
- Pediatric: Not recommended due to lack of safety data
- Athletes: Popular as a pre-workout supplement; not currently on WADA prohibited list but check current regulations
- Caffeine-sensitive individuals: May be better tolerated than caffeine, but still exercise caution
- Sleep disorder patients: Avoid evening dosing; half-life may be longer than caffeine in some individuals
Pharmacokinetic Profile
Quick Start
- Typical Dose
- 100-200mg is commonly used, with research supporting safety and efficacy in this range
Molecular Structure
- Formula
- C9H12N4O3
- Weight
- 224.22 Da
- PubChem CID
- 75324
- Exact Mass
- 224.0909 Da
- LogP
- -0.2
- TPSA
- 64.2 Ų
- H-Bond Donors
- 0
- H-Bond Acceptors
- 3
- Rotatable Bonds
- 0
- Complexity
- 442
Identifiers (SMILES, InChI)
InChI=1S/C9H12N4O3/c1-10-5-6(11(2)8(10)15)12(3)9(16)13(4)7(5)14/h1-4H3
QGDOQULISIQFHQ-UHFFFAOYSA-NSafety Profile
Common Side Effects
- Minimal Side Effects:: Research and user reports indicate very few adverse effects, with safety demonstrated up to 300mg daily for 8 weeks
- Mild Stimulation:: Some users report subtle jitteriness or overstimulation at higher doses, though less pronounced than caffeine
- Sleep Effects:: Small non-significant effects on sleep efficiency noted in research with 400mg doses, though generally well-tolerated
- Individual Sensitivity:: As with most stimulants, individual responses vary with some reporting headaches or digestive discomfort
References (5)
- [1]Dose response effects of theacrine on cognitive performance and subsequent sleep
→ Theacrine consumed within eight hours of bedtime improved next-morning cognitive performance with the 400mg dose reducing lapses on vigilance tasks, while showing only small non-significant effects on nighttime sleep quality.
- [3]Safety of TeaCrine®, a non-habituating, naturally-occurring purine alkaloid over eight weeks of continuous use
→ Eight-week study of 60 participants found theacrine safe at doses up to 300mg daily with no evidence of habituation or tolerance, maintaining stable effects on energy, focus, and motivation throughout the study period.
- [4]The effects of TeaCrine® and caffeine on endurance and cognitive performance during a simulated match in high-level soccer players
→ Theacrine showed 27-38% improvements in time-to-exhaustion compared to placebo in high-level soccer players, with benefits to cognitive performance and endurance capacity during simulated matches.
- [5]Theacrine, a Potent Antidepressant Purine Alkaloid from a Special Chinese Tea, Promotes Adult Hippocampal Neurogenesis in Stressed Mice
→ Animal study demonstrated theacrine's antidepressant properties through promotion of adult hippocampal neurogenesis in stressed mice, suggesting potential mood-enhancing mechanisms.
- [2]Cognitive Performance and Mood Following Ingestion of a Theacrine-Containing Dietary Supplement, Caffeine, or Placebo by Young Men and Women
→ Study compared theacrine effects with caffeine and placebo on energy, mood, and objective measures of cognitive performance in young adults, demonstrating improvements in subjective energy and focus.
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