Theacrine
Other ·Exploratory record · not publication-reviewed ·Updated July 13, 2026
Theacrine is a caffeine-like purine alkaloid found in kucha tea and cupuacu and marketed for energy, focus, and reduced habituation. Short human studies suggest subjective energy and focus effects with acceptable short-term safety, but evidence remains limited and often industry-associated. It should be used cautiously in people sensitive to stimulants, insomnia, hypertension, or arrhythmias.
Exploratory record, not a reviewed medical publication.
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This generated database record has not completed a claim-level review by a qualified human medical reviewer. Bibliography links and evidence labels are not approval. The page remains available for reference and is excluded from search indexing.
What the research says.
A quick, data-only summary. The full evidence, dosing, and sources are below.
Theacrine is an other most often used for may increase subjective energy and focus, may reduce perceived fatigue, may support workout motivation. NutriStack rates the overall evidence as emerging. A typical adult dose is 50-200 mg daily, usually in the morning; avoid late-day dosing, commonly taken as teacrine or standardized theacrine capsule with clear stimulant content. This profile indexes 3 sources.
- May increase subjective energy and focus2
- May reduce perceived fatigue
- May support workout motivation
- May have less rapid tolerance than caffeine in short studies
- Insomnia, restlessness, or anxiety
- Headache or jitteriness
- Palpitations or increased heart rate in sensitive users
- Pregnancy and breastfeeding due to insufficient safety data1
- Uncontrolled hypertension, arrhythmia, or significant cardiovascular disease
The bottom line
Evidence rating emerging. Most-documented uses: may increase subjective energy and focus, may reduce perceived fatigue, may support workout motivation. 3 sources indexed (2015–2017), with 0 interaction records on file.
How it works, mechanistically.
Core mechanism
Theacrine appears to influence adenosine and dopamine-related signaling, producing stimulant-like subjective energy without being identical to caffeine. Human pharmacokinetic work suggests a long half-life relative to caffeine and possible interaction when coadministered with caffeine. Because arousal effects can persist, late-day dosing can disrupt sleep even when users perceive it as smoother than caffeine.1,2
Dosing & protocol.
Can be taken with or without food. Because effects may last longer than caffeine, morning dosing is preferred and combined caffeine should be limited.2
What it actually costs.
Real-world pricing across three quality tiers. Assumes TeaCrine capsule.
Single-ingredient theacrine is usually cheaper than multi-ingredient pre-workout blends. Updated 2026-06-04.
Full safety detail.
Side effects
- Insomnia, restlessness, or anxiety
- Headache or jitteriness
- Palpitations or increased heart rate in sensitive users
- Nausea or GI upset
- Possible blood pressure elevation when combined with caffeine or stimulants
Contraindications
Sources, by evidence tier.
Numbered references. Citations throughout the page link here.
Randomized controlled trials
2- 1Safety of TeaCrine, a non-habituating, naturally-occurring purine alkaloid over eight weeks of continuous useTaylor L et al. · Journal of the International Society of Sports Nutrition · 2016
Daily 200-300 mg TeaCrine was studied for safety markers and habituation over 8 weeks.
- 2A Two-Part Approach to Examine the Effects of Theacrine Supplementation on Oxygen Consumption, Hemodynamic Responses, and Subjective Measures of Cognitive and Psychometric ParametersKuhman DJ et al. · Journal of Dietary Supplements · 2015
A 200 mg dose increased subjective energy and focus measures in a small study.
Reference material
1- 3Assessment of the Drug-Drug Interaction Potential Between Theacrine and Caffeine in HumansHe H et al. · Journal of Caffeine Research · 2017
Combined administration altered exposure patterns and supports caution with caffeine stacking.
Common questions.
Quick answers about Theacrine, drawn from the data on this page.
What is Theacrine?
Theacrine is a caffeine-like purine alkaloid found in kucha tea and cupuacu and marketed for energy, focus, and reduced habituation. Short human studies suggest subjective energy and focus effects with acceptable short-term safety, but evidence remains limited and often industry-associated. It should be used cautiously in people sensitive to stimulants, insomnia, hypertension, or arrhythmias.
What is Theacrine used for?
Commonly cited benefits of Theacrine include: May increase subjective energy and focus; May reduce perceived fatigue; May support workout motivation; May have less rapid tolerance than caffeine in short studies. NutriStack rates the overall evidence as emerging.
What is a typical dose of Theacrine?
A typical adult dose of Theacrine is 50-200 mg daily, usually in the morning; avoid late-day dosing. The commonly recommended form is TeaCrine or standardized theacrine capsule with clear stimulant content. These are general ranges, not personalized advice; confirm the right dose with a clinician.
What are the side effects of Theacrine?
Reported side effects include insomnia, restlessness, or anxiety, headache or jitteriness, palpitations or increased heart rate in sensitive users, nausea or gi upset, possible blood pressure elevation when combined with caffeine or stimulants. This is educational information; check with a healthcare professional before use.
How strong is the evidence for Theacrine?
NutriStack rates this as Emerging, meaning early RCT signal, mechanistic data, or limited human evidence. Full tier criteria are at https://nutristackapp.com/methodology/evidence-tiers.
Use this with your stack
Theacrine in NutriStack.
Add it to your stack, see how it interacts with everything else you take, and get a Stack Score that updates the moment it does.