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Paraxanthine: Uses, Benefits, Dosage & Safety

Last updated: August 2026 · Reviewed by the FactoWiki Editorial Team for clarity and source accuracy

Written by FactoWiki Research Team · Reviewed by Supplement Research Editor

Last reviewed: August 2026 · Sources checked: PubMed, NIH, MedlinePlus, NCCIH, FDA

Quick summary

Paraxanthine is the metabolite your liver converts most caffeine into — and it is arguably the compound actually responsible for caffeine's effects. Supplying it directly skips the variable conversion step. Early human trials look promising, but the evidence base is small and largely industry-funded.

What is Paraxanthine?

Paraxanthine (1,7-dimethylxanthine) is the primary metabolite of caffeine in humans — roughly 72–80% of ingested caffeine is converted to it by the liver enzyme CYP1A2. It is sold as a standalone ingredient, usually under the trade name enfinity.

What Paraxanthine is commonly used for

Energy, focus, reaction time and pre-workout performance, marketed as a cleaner alternative to caffeine.

How Paraxanthine works

Like caffeine it antagonises adenosine receptors, but with a different profile: it is a stronger adenosine antagonist and a weaker phosphodiesterase inhibitor, which is the theoretical basis for the claim of energy without jitters. Crucially, it bypasses CYP1A2 conversion — the enzyme with substantial genetic variation between people, which is why caffeine affects individuals so differently.

What the evidence says

Each claim below is tied to the specific study behind it, rather than to a general reading list.

Typical dosage used in studies

Human trials have used 100–300 mg. Its half-life is shorter than caffeine's, roughly 3–4 hours against 5–6, which is the basis for the claim of less sleep disruption.

Side effects and safety

Short-term trials report good tolerability at these doses. It is a stimulant, and the usual stimulant cautions apply. Long-term safety data do not yet exist — this is a recent ingredient.

Medication interactions and who should avoid Paraxanthine

Medication & safety check

Treat it as caffeine for interaction purposes: caution with stimulant medication, and with anything affecting heart rate or blood pressure. Anyone with an arrhythmia, uncontrolled hypertension or an anxiety disorder should be careful. Do not stack it with a full caffeine dose without accounting for the total.

General information, not personal medical advice. If you take any medication, confirm it is safe to combine with Paraxanthine with your doctor or pharmacist first.

Sources & further reading

The claim-level citations above are drawn from these sources:

Frequently asked questions

Is it better than caffeine?

Possibly, for some people — but the evidence is early and much of it comes from studies with commercial involvement. The strongest argument in its favour is mechanistic: it removes the CYP1A2 variability that makes caffeine unpredictable between individuals.

Will it keep me awake?

Less than caffeine, in principle — its half-life is shorter. It is still a stimulant, and taking it late in the day is still a bad idea.

Can I take it with coffee?

You can, but you are then stacking a stimulant on the metabolite of the same stimulant. Count the total before doing it.

Where you'll find Paraxanthine

Paraxanthine appears in Energy, Focus & Pre-Workout formulas. Browse the supplement guides to see the products we review, each with a full breakdown of formula, pricing and safety.

Related ingredients to explore

Ingredients often studied or formulated alongside Paraxanthine.

CaffeineCaffeine is the world's most-used stimulant, with strong evidence for alertness and exercise performance. The…Open →TheacrineTheacrine is a caffeine-like compound (found in a Chinese tea plant) marketed for energy and focus with 'less…Open →L-TheanineL-theanine is an amino acid from tea that promotes a state of calm alertness without sedation. It has modest but…Open →

General information, not medical advice.