Higenamine

non-nutrient/non-botanical(RS)-norcoclaurine

What is it

Higenamine (also called norcoclaurine) is a benzylisoquinoline alkaloid originally identified in plants such as Aconitum carmichaelii and Nandina domestica. It is used in some weight-loss, pre-workout, and 'fat-burner' supplements, marketed as a beta-2 adrenergic agonist for thermogenesis and bronchodilation.

How it works

Higenamine acts as a beta-2 adrenergic receptor agonist with mild beta-1 activity. By stimulating these receptors, it produces effects similar to other adrenergic agents, including increased heart rate, bronchodilation, and lipolysis. These actions form the rationale for its use in fat-loss and exercise supplements, although clinical evidence in humans is limited. In pharmacokinetic studies, oral higenamine reaches peak plasma concentrations within 10-30 minutes but has a short half-life (around 8-10 minutes for the IV form). It crosses the blood-brain barrier and has shown some cardiovascular activity in human subjects. Higenamine is on the World Anti-Doping Agency (WADA) prohibited list as a beta-2 agonist.

Evidence for 3 uses

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Fat oxidation / weight loss

Grade F

Limited evidence

Marketed for fat loss based on its beta-adrenergic activity, but well-designed human studies showing meaningful weight loss are absent. Effects in available short-term human research are small.

Exercise performance / pre-workout energy

Grade F

Limited evidence

Some combination pre-workouts containing higenamine show short-term effects on heart rate and perceived energy, but these likely reflect other ingredients (especially caffeine). Standalone human efficacy data are weak.

Bronchodilation (theoretical, traditional)

Grade F

Limited evidence

As a beta-2 agonist, higenamine has theoretical bronchodilator activity, and traditional uses include some respiratory applications. Modern clinical studies for asthma or respiratory conditions are limited.

1 commercial form

Higenamine HCl

Short half-life; rapid absorption

The most common supplement form, used in pre-workout and fat-loss products.

Dosage

There is no established human dose. Supplements typically contain 25-75 mg per serving. Higher doses or combinations with stimulants substantially increase cardiovascular risk. The labeled content of higenamine in commercial products often exceeds amounts shown to alter heart rate and rhythm.

When and how to take it

Take only in the earlier part of the day if used at all, to minimize sleep disruption and stacked cardiovascular effects. Avoid combining with caffeine, pre-workouts, or other stimulants. Discontinue immediately if palpitations, chest pain, or anxiety occur.

Safety

Higenamine can cause significant cardiovascular effects, including increased heart rate, palpitations, and blood pressure changes, even at supplement doses. Adverse event reports have included rapid heart rate, anxiety, and chest pain. Long-term safety data in humans are lacking. Quality of commercial products is variable, with some studies showing actual content very different from label claims.

Who should be cautious

Avoid in pregnancy and breastfeeding. Contraindicated in cardiovascular disease, arrhythmias, hypertension, hyperthyroidism, anxiety disorders, and glaucoma. Avoid before surgery. Banned in competitive sports (WADA). People with respiratory disease taking inhaled beta agonists should not stack with higenamine.

Interactions

Higenamine can interact with other beta agonists (asthma inhalers), stimulants (caffeine, synephrine, ephedra), antihypertensive medications, antiarrhythmics, and MAO inhibitors. Combining with caffeine or other thermogenic ingredients amplifies cardiovascular risk. People taking beta-blockers may experience reduced effects of their medication.

Frequently asked questions

Is higenamine banned in sports?⌄

Yes. The World Anti-Doping Agency classifies it as a prohibited beta-2 agonist for athletes in and out of competition.

Does higenamine actually burn fat?⌄

Direct evidence in humans is limited. Most claims rely on the receptor mechanism rather than clinical weight-loss data.

Is higenamine safe to take with caffeine?⌄

Combinations of higenamine and caffeine raise heart rate and blood pressure more than either alone. Adverse events have been reported.

Why are higenamine doses unreliable?⌄

Studies of commercial products have found wide variation between labeled and actual content, sometimes by orders of magnitude. Manufacturer quality control varies.

Can higenamine affect a drug test?⌄

Yes, higenamine has been detected in anti-doping tests and is on prohibited lists in many sports.

References

  • Higenamine (Wikidata) — Wikidata link
  • Higenamine (PubChem CID 114840) — PubChem link
  • Higenamine (ChEBI 18418) — ChEBI link

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Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you're pregnant, breastfeeding, on medications, or managing a chronic condition.