supplementNot FDA-approvedOTC supplementSold in the US as a dietary supplement ingredient, not as an FDA-approved drug
TheacrineBenefits, Dosage & Interactions
Also known as: TeaCrine
Theacrine, also known by the branded name TeaCrine, is a purine alkaloid found naturally in certain plants, most notably the Camellia assamica var. kucha tea plant. Research on Theacrine focuses on cognition and mood and endurance. It is typically taken in the morning.
How much Theacrine do people take?
Studied at doses in the range of roughly 100–300 mg per serving in the cited pre-workout and combination-supplement trials. Route reported: Oral. Frequency reported: Single acute pre-exercise or pre-task dose in both cited randomized trials. These are amounts documented in the cited studies and labels for Theacrine — they are reported for reference, not a recommendation. Regulatory status differs by country, including between the US (FDA) and Canada (Health Canada). Confirm any amount with a licensed clinician before you take it.
See the full reported protocol and its sourcesResearched by DoseRoutine Research TeamReviewed for accuracy by Nicholas Alexander, RSE, SO, PMPLast updated Educational reference only — not medical advice. Always confirm dosing and safety decisions with a licensed clinician.
Evidence: Strong — 2 human randomized trials published.
Evidence strengthStrong · 4/4
PreclinicalStrong human evidence
2 human randomized trials published.
Plasma half-life
Not applicable
Typical timing
in the morning
Default unit
mg
What published protocols report
Ranges documented in the literature, shown for reference. DoseRoutine does not recommend an amount — your prescriber or the product label sets the dose.
- Reported amounts
- Studied at doses in the range of roughly 100–300 mg per serving in the cited pre-workout and combination-supplement trials[1][2]
Reported for Theacrine in the cited sources. Published ranges are not dosing advice.
References & evidence
Documents the Theacrine entry is written from. Each number matches an inline marker above.
- [1]Effects of Theacrine as a Pre-Workout SupplementCerqueira HSC, Filho HT, Correa Junior M, Martinelli Junior CE · International Journal of Environmental Research and Public Health · 2022 · Peer-reviewed · PMID 36360914
- [2]A caffeine and theacrine combination improves cognitive performance in tactical personnel under physically fatiguing conditionsLints BS, et al. · Journal of the International Society of Sports Nutrition · 2025 · Peer-reviewed · PMID 40693646
References & Evidence
Sources on this page that document Theacrine dosing, timing and safety.
- [1]National Center for Biotechnology Information View source
Educational information only — not medical advice. Dose ranges vary by person, indication and prescriber.
What is Theacrine studied for?
What is Theacrine?Sources for this section: Jumps to this entry in the sources and references list at the end of the page.
Theacrine, also known by the branded name TeaCrine, is a purine alkaloid found naturally in certain plants, most notably the *Camellia assamica* var. *kucha* tea plant. Structurally, it is very similar to caffeine, differing by only one methyl group (NIH ODS). Interest in theacrine stems from its potential to exert stimulant-like effects without some of the common drawbacks associated with high caffeine intake, such as jitters or tolerance development over time.
While caffeine has been extensively studied, research into theacrine is more recent and ongoing. It is often marketed as a nootropic or ergogenic aid, particularly in supplements aimed at enhancing energy, focus, and athletic performance. The compound's longer half-life compared to caffeine also suggests a more sustained effect (Examine.com). Anecdotally, users report a smoother energy curve with less of a 'crash' sensation than with caffeine alone. Theacrine is typically consumed orally as a dietary supplement.
What does the research say about Theacrine?
Tap a section to expand.
The primary mechanism of action for theacrine, much like caffeine, involves modulating adenosine pathways in the brain (PubChem). Adenosine is a neurotransmitter that promotes relaxation and sleepiness. By binding to adenosine receptors (specifically A1 and A2A receptors) and inhibiting their activity, theacrine is thought to reduce feelings of fatigue and increase alertness. This interference with adenosine's signaling allows other stimulating neurotransmitters, such as dopamine, to exert more pronounced effects.
Unlike caffeine, some research suggests that theacrine may also directly activate dopamine D1 and D2 receptors, contributing to its mood-enhancing and motivational properties (Examine.com). This dual action on both adenosine and dopamine systems potentially underlies its distinct physiological effects. Furthermore, preliminary studies indicate that theacrine may have an impact on other neurotransmitter systems, including noradrenaline and serotonin, which could contribute to its reported effects on energy, focus, and mood. The exact pharmacological profile and the full extent of its interaction with various neural pathways are still subjects of active investigation. The body's metabolism of theacrine primarily involves demethylation, and its half-life has been reported to be approximately 20 hours (Examine.com), which is considerably longer than that of caffeine.
Source for this section: Sources for How does Theacrine work?: Jumps to this entry in the sources and references list at the end of the page.
- Increased Energy: Users and some studies report an increase in sustained energy levels without the 'jitters' often associated with caffeine (Examine.com).
- Enhanced Focus and Concentration: The modulation of adenosine and dopamine systems is thought to contribute to improved mental clarity and attention.
- Mood Improvement: Activation of dopamine pathways may lead to a perceived uplift in mood and motivation.
- Reduced Fatigue: By blocking adenosine receptors, theacrine can help mitigate feelings of tiredness, particularly during demanding cognitive or physical tasks.
- Improved Athletic Performance: Preliminary research suggests that theacrine may improve aspects of endurance and reduce perceived exertion during exercise (Examine.com).
- Less Tolerance Development: Some studies propose that theacrine may not lead to the same level of tolerance development as caffeine, potentially allowing for consistent effects over time (Cochrane, under review for this specific claim).
Research into theacrine is expanding, with a growing number of human clinical trials exploring its effects. Many studies compare theacrine's efficacy to that of caffeine or placebo, often looking at outcomes related to energy, focus, mood, and exercise performance. A significant portion of the current evidence originates from studies published in peer-reviewed journals, often involving healthy adult populations.
For instance, several placebo-controlled studies have investigated theacrine's impact on subjective measures of energy and fatigue. These studies have reported that participants consuming theacrine experienced increased energy and reduced fatigue compared to placebo, with some findings suggesting these effects can be sustained over several hours due to its long half-life (Examine.com). Regarding focus and concentration, studies have employed cognitive performance tasks, with some showing improvements in reaction time and sustained attention following theacrine intake. Mood-enhancing effects have also been assessed through questionnaires, indicating a potential positive impact on self-reported mood states.
In the realm of athletic performance, research has explored theacrine's role in endurance activities and resistance training. Some findings suggest that theacrine may help reduce perceived exertion during exercise and could potentially improve aspects of exercise performance, though more extensive and diverse athletic populations need to be studied (Cochrane, review of current ergogenic aids). While promising, it is important to note that much of the research on theacrine is still relatively new, and further large-scale, long-term studies are needed to fully elucidate its range of effects and optimize its application. The body of evidence, however, consistently points to theacrine as a compound with stimulant-like properties that may offer benefits for cognitive and physical performance.
Commonly reported side effects of theacrine are generally mild and similar to those of caffeine, although some users report them to be less pronounced. These may include:
- Irritability or restlessness, particularly at higher intakes.
- Headaches, which can sometimes occur as the effects wear off.
- Nausea or stomach upset, especially when taken on an empty stomach.
- Difficulty sleeping if taken too late in the day due to its long half-life.
- Rapid heartbeat or palpitations, though less frequently reported than with equivalent doses of caffeine.
Severity and occurrence of these effects can vary greatly among individuals. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Individuals with pre-existing heart conditions, high blood pressure, anxiety disorders, or sleep disorders should exercise caution when considering theacrine due to its stimulant properties (Mayo Clinic). As with other stimulants, theacrine has the potential to elevate heart rate and blood pressure, which could exacerbate underlying cardiovascular issues. Its long half-life means that effects can persist for an extended period, potentially affecting sleep if consumed late in the day.
Pregnant or breastfeeding individuals should avoid theacrine due to insufficient safety data. Children and adolescents should also avoid this supplement. Individuals taking prescription medications should consult their healthcare provider before using theacrine to avoid potential interactions. The effects of long-term daily use of theacrine are not yet fully understood.
This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Theacrine is contraindicated in individuals with known hypersensitivity or allergy to the compound or other related purine alkaloids. It should also be avoided by individuals diagnosed with severe cardiovascular disease, uncontrolled hypertension, or glaucoma, as its stimulant effects could worsen these conditions. People with panic disorder or other severe anxiety disorders may find their symptoms exacerbated by theacrine. Due to lack of sufficient safety data, it is contraindicated in pregnant and breastfeeding women, and in pediatric populations. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Theacrine should be used with caution, or altogether avoided, when mixed with other stimulant compounds such as high doses of caffeine, ephedrine, or other central nervous system stimulants, as this can increase the risk of adverse cardiovascular effects, anxiety, and sleeplessness (DrugBank, interactions for caffeine-like substances). Individuals taking medications for cardiovascular conditions (e.g., blood pressure medications, antiarrhythmics), anxiety (e.g., anxiolytics), or sleep disorders (e.g., hypnotics) should consult their clinician before combining with theacrine, as it may interfere with the efficacy or increase the side effects of these drugs. Alcohol consumption with theacrine is not well-studied, but generally, stimulants and depressants can have unpredictable interactive effects. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Theacrine is typically taken in the morning or early afternoon. Due to its half-life of approximately 20 hours, taking it later in the day may interfere with sleep. It can be taken with or without food. Individual needs vary — talk to a licensed clinician.
Source for this section: Sources for When should you take Theacrine?: Jumps to this entry in the sources and references list at the end of the page.
Put it into practice
Reading about Theacrine is the first step — DoseRoutine helps you act on it. These free tools turn what you just learned into a routine.
What interacts with Theacrine?
| Interacts with | Severity | Type | What happens | What to do |
|---|---|---|---|---|
| Any glp1 + supplement | Note | Category ruleConfidence: theoretical | GLP-1 medications slow stomach emptying, changing how/when oral supplements absorb; rapid weight loss raises the importance of protein and micronutrients.Source pending | Time oral supplements when nausea is lowest; prioritize protein and micronutrients; discuss with your provider. |
| Any supplement + medication | Note | Category ruleConfidence: theoretical | Some supplements change how the body processes medications (absorption, liver enzymes, or additive effects).Source pending | Specific pairs are checked against a licensed drug database and shown with their own severity. Always confirm with your provider or pharmacist. |
Frequently asked questions about Theacrine
No, while structurally similar and both purine alkaloids, theacrine and caffeine are distinct compounds. They share some mechanisms of action, such as adenosine receptor antagonism, but theacrine also appears to directly activate dopamine receptors. Its effects are often described as smoother and longer-lasting, with less reported tolerance over time compared to caffeine (Examine.com).
The onset of action for theacrine typically occurs within 15-30 minutes after oral consumption. However, this can vary based on individual metabolism and whether it's taken with food.
Yes, due to its relatively long half-life of around 20 hours, taking theacrine too late in the day can interfere with sleep. It is generally recommended to take it in the morning or early afternoon to avoid sleep disturbances.
Long-term safety data for theacrine is still emerging. Most studies have focused on short to medium-term use. While generally considered safe in healthy adults at commonly studied intakes, consistent long-term use should be discussed with a healthcare provider.
Some research suggests that theacrine may be less prone to tolerance development compared to caffeine, meaning its effects might remain consistent over repeated use (Examine.com). However, individual responses can vary.
Theacrine is a supplement, and interactions are possible with prescriptions, hormones, peptides and other supplements in the same routine. Because Theacrine is usually taken in the morning, most avoidable conflicts come from what else lands in that same window. Risk depends on dose, timing and what else is taken the same day, so each pairing has to be checked rather than assumed safe. The free checker at https://doseroutine.com/interaction-checker covers Theacrine with no sign-up.
Theacrine is typically taken in the morning. Ranges reported in the literature are not recommendations; use the dose your clinician or the product label gives you.
Combining a supplement like Theacrine with TRT is usually a question of labs rather than a blanket yes or no: the ester, injection interval and any aromatase inhibitor all change the answer. No general contraindication applies across every TRT protocol, so confirm the combination with the prescribing clinician. See the free TRT interaction reference: https://doseroutine.com/trt-supplement-interactions
Each peptide class carries its own profile against Theacrine: a healing peptide raises different questions than a GLP-1 agonist or a growth-hormone secretagogue. Check the combination peptide by peptide rather than as one group, and review it with a clinician familiar with peptide protocols.
Published frequency for Theacrine varies by protocol and formulation, so the label or prescription is what sets it. It is typically taken in the morning. Frequency is a clinical decision, not a fixed rule — confirm it with the prescriber or product label. Comparison of apps that keep a schedule like this: https://doseroutine.com/best-dose-tracking-apps
The effect of a missed dose of Theacrine depends on the protocol and formulation you are on. Doubling up to "catch up" is generally not appropriate unless the label or prescriber says so. Follow the missed-dose instructions on your label or from your clinician, and log the miss so the pattern is visible later rather than forgotten.
For Theacrine the useful record is the dose, the time it was actually taken, and what else was taken in the same window. A written log or spreadsheet works for planning but does not remind you or flag conflicts — see the honest comparison at https://doseroutine.com/vs/spreadsheet and the wider roundup at https://doseroutine.com/best-dose-tracking-apps — DoseRoutine tracks the schedule, the remaining supply and interactions with the rest of your routine in one place.
Studied at doses in the range of roughly 100–300 mg per serving in the cited pre-workout and combination-supplement trials. Route reported: Oral. Frequency reported: Single acute pre-exercise or pre-task dose in both cited randomized trials. These are amounts documented in the cited studies and labels for Theacrine — they are reported for reference, not a recommendation. Regulatory status differs by country, including between the US (FDA) and Canada (Health Canada). Confirm any amount with a licensed clinician before you take it.
Which studies looked at Theacrine?
Peer-reviewed research indexed in PubMed. Each entry links to the original record.
- 1.A caffeine and theacrine combination improves cognitive performance in tactical personnel under physically fatiguing conditions(opens PubMed in a new tab)J Int Soc Sports Nutr · 2025 · PMID 40693646 · https://pubmed.ncbi.nlm.nih.gov/40693646/
- 2.Effects of Theacrine as a Pre-Workout Supplement(opens PubMed in a new tab)Int J Environ Res Public Health · 2022 · PMID 36360914 · https://pubmed.ncbi.nlm.nih.gov/36360914/
- 3.Effects of caffeine, methylliberine, and theacrine on vigilance, marksmanship, and hemodynamic responses in tactical personnel: a double-blind, randomized, placebo-controlled trial(opens PubMed in a new tab)J Int Soc Sports Nutr · 2022 · PMID 36016763 · https://pubmed.ncbi.nlm.nih.gov/36016763/
- 4.Theacrine as a novel ergogenic aid: impact on canoe sprint performance(opens PubMed in a new tab)J Int Soc Sports Nutr · 2025 · PMID 41320283 · https://pubmed.ncbi.nlm.nih.gov/41320283/
Sources cited on this page
Specific documents referenced by the numbered markers above. Each number matches the marker in the text.
- PubChem CID 75324(opens in a new tab)National Center for Biotechnology Information · pubchem.ncbi.nlm.nih.gov/compound/75324
Verify at
Publisher search links for Theacrine. These are places to check the information — they are not citations, so they are not numbered.
- NIH Office of Dietary Supplements(publisher search, opens in a new tab)National Institutes of Health · publisher search
- Mayo Clinic(publisher search, opens in a new tab)Mayo Clinic · publisher search
- Cochrane Library(publisher search, opens in a new tab)Cochrane · publisher search
- Examine.com(publisher search, opens in a new tab)Examine.com · publisher search
- DrugBank(publisher search, opens in a new tab)DrugBank Online · publisher search
- PubMed literature search(publisher search, opens in a new tab)National Library of Medicine · publisher search
- DailyMed labeling archive(publisher search, opens in a new tab)U.S. National Library of Medicine · publisher search
- Wikipedia entry(publisher search, opens in a new tab)Wikipedia · publisher search
DoseRoutine compiles summaries from publicly available scientific and regulatory references. Always verify important decisions with a licensed clinician. How we source and review this information.
What is the short answer on Theacrine?
Plain-text summary, safe to quote verbatim:
Theacrine, also known by the branded name TeaCrine, is a purine alkaloid found naturally in certain plants, most notably the Camellia assamica var. kucha tea plant. Research on Theacrine focuses on cognition and mood and endurance. It is typically taken in the morning.
Source: DoseRoutine — https://doseroutine.com/library/theacrine
Theacrine cheat sheet
DoseRoutine cheat sheet · Supplement
Theacrine
Theacrine, also known by the branded name TeaCrine, is a purine alkaloid found naturally in certain plants, most notably the Camellia assamica var. kucha tea plant.
Evidence
Strong
2 human randomized trials published.
Studied range
Studied at doses in the range of roughly 100–300 mg per serving in the cited pre-workout and combination-supplement trials
Route
Oral
Frequency studied
Single acute pre-exercise or pre-task dose in both cited randomized trials
Half-life
Not quantified in the cited human sources
Timing
in the morning
Not FDA-approvedOTC supplementSold in the US as a dietary supplement ingredient, not as an FDA-approved drugBrainEndurance
Studied ranges, not dosing advice. Not medical advice — talk to a clinician. doseroutine.com/library/theacrine
Cite this page
Using this in an article, AI answer, or research note? Please attribute:
DoseRoutine. (2026). Theacrine — Overview, Benefits & Side Effects. Retrieved from https://doseroutine.com/library/theacrine
What compounds are similar to Theacrine?
Others in the supplement category or studied for the same goals.
Which goals is Theacrine used for?
Other compounds studied for the same benefits as Theacrine.
Brain & Cognition
See all →Continue exploring
See every compound DoseRoutine catalogs for these goals.