Beta Methylphenethylalamine

PhytochemicalPhenethylamine

What is it

Beta-methylphenylethylamine (N-methyl-beta-phenylethylamine, BMPEA) is a synthetic stimulant compound related to amphetamine. It has appeared as an undeclared ingredient in some 'pre-workout' and weight-loss supplements, often falsely labeled as Acacia rigidula extract.

Evidence for 1 use

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

Stimulant / energy

Mixed Evidence

Pharmacologically a stimulant, but safety concerns and lack of regulatory approval outweigh any acute effects.

How it works

BMPEA acts as a sympathomimetic stimulant, releasing norepinephrine and dopamine in the central nervous system and producing cardiovascular and CNS-stimulant effects similar to (though weaker than) amphetamine.

Dosage

Not legally permitted in dietary supplements. We do not recommend any dose.

When and how to take it

Not applicable - we do not recommend use of BMPEA-containing products.

1 commercial form

Compare the main delivery options and what they’re best suited for.

BMPEA HCl (synthetic)

Illegally added to some 'natural' supplements.

Orally bioavailable

Safety

FDA does not consider BMPEA a lawful dietary ingredient. Reported adverse effects include increased blood pressure, heart rate, palpitations, anxiety, stroke risk. Athletic organizations (WADA, NCAA) classify it as a prohibited stimulant.

Who should be cautious

Should be avoided by all populations. Particularly dangerous in cardiovascular disease, hypertension, anxiety disorders, pregnancy or lactation. Athletes face sanctions.

Interactions

Significant interactions with monoamine oxidase inhibitors (MAOIs), SSRIs, sympathomimetics, and cardiovascular medications. Risk of serotonin syndrome and hypertensive crisis.

Frequently asked questions

Is BMPEA legal in supplements?⌄

No. FDA has stated BMPEA is not a lawful dietary ingredient and is not naturally found in Acacia rigidula despite some product claims.

Is BMPEA safe?⌄

It has been associated with serious cardiovascular adverse events. We do not recommend use of BMPEA-containing products.

References

Beta Methylphenethylalamine on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on Beta Methylphenethylalamine (PubMed search) — PubMed link

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Evidence-based·How we grade evidence

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.