Cross-referencing clinical data
A pairing appears on this page only when a trial gave both ingredients together and measured the result. Beta-Methylphenethylamine has none that clears that bar.
Stitching two separate single-ingredient studies into a pairing is the one thing this engine will not do. When a study of the combination itself holds up at source, it lands here with its citation.
No invented synergy. Where actives were studied on their own rather than together, the record shows each on its own evidence, never a combined effect no trial measured.
Research strength. Research strength says how much work stands behind the combination. It is never a product score.
Independent record. Every finding is cited to a named trial, dated, and never written by the brand.
20 pairings are live across the library today. Checked 20 July 2026.
No study gave these as a pair, so they are not in the card above. But the reason they belong together is settled biochemistry, not a guess, so it is worth knowing.
Caffeine raises circulating catecholamines and blocks adenosine receptors while BMPEA drives noradrenaline release directly. Stacked, the effect on heart rate and blood pressure adds up rather than cancelling. Nearly every product carrying BMPEA also carries caffeine, usually inside the same undeclared blend, so the stack happens whether the buyer intends it or not.
Yohimbine blocks the presynaptic autoreceptor that normally brakes noradrenaline release, and BMPEA pushes release. The combination amplifies sympathetic tone more than either alone. Anxiety and palpitations are the predictable result and both compounds frequently appear in the same blends.
Theanine is often added to blunt the jitter from stimulants and it does shift the subjective texture of caffeine. It does nothing to the peripheral pressor effect of a releasing amine. Smoothing the feel while leaving the cardiovascular load intact is a poor bargain here.
St John's wort has weak monoamine reuptake activity across several transmitters. Combining it with an amine that drives noradrenaline release stacks two inputs onto the same system. The interaction is mechanistic reasoning rather than measured, and it points toward avoidance rather than pairing.
Nothing specific on file for Beta-Methylphenethylamine. Match the label to the daily amount above, and tell your doctor what you take.
Not medical advice. Show the label to your pharmacist.FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This information is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider before starting any supplement regimen.