Diethyl phenethylamine

PhytochemicalPhenethylamine derivative

What is it

N,N-diethyl-beta-phenylethylamine (N,N-DEPEA) is a synthetic stimulant amine sometimes added to pre-workout or weight-loss supplements. The FDA has explicitly warned that N,N-DEPEA does not qualify as a legitimate dietary ingredient.

Evidence for 1 use

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

Energy / weight loss (marketed)

Mixed Evidence

Marketed for energy and weight loss but with no legitimate human clinical evidence and substantial safety concerns.

How it works

N,N-DEPEA is structurally related to amphetamine and methamphetamine. Pharmacologically it is a sympathomimetic, expected to stimulate release of norepinephrine and dopamine and increase heart rate and blood pressure. It is not a naturally occurring constituent of any food or recognized botanical source. The FDA has issued warning letters to companies adding it to supplements, classifying it as an unsafe ingredient that adulterates products.

Dosage

There is no legitimate dose. Products that have contained it typically delivered tens of milligrams per serving, similar to other unauthorized stimulant amines.

When and how to take it

No legitimate timing.

1 commercial form

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

Synthetic stimulant powder

Has been added to certain pre-workout and weight-loss products; FDA warned against.

Orally active.

Safety

Reasonably expected risks based on chemistry and class include hypertension, tachycardia, arrhythmia, insomnia, anxiety, and risk of stroke or heart attack, particularly when combined with caffeine, other stimulants, or in people with cardiovascular risk factors.

Who should be cautious

Do not use. The FDA considers products containing N,N-DEPEA adulterated. Particularly hazardous for anyone with cardiovascular disease, hypertension, anxiety disorders, or on psychiatric/cardiac medications.

Interactions

Dangerous in combination with MAO inhibitors, SSRIs, stimulants (caffeine, ephedrine), sympathomimetic decongestants, and many cardiac medications.

Frequently asked questions

Is N,N-DEPEA legal?⌄

The FDA has stated it is not a legitimate dietary ingredient and considers products containing it adulterated.

Is it dangerous?⌄

It is a powerful sympathomimetic with substantial cardiovascular risk. Avoid.

References

Diethyl phenethylamine on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on Diethyl phenethylamine (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.