Rauwolscine — answers to alpha-yohimbine
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Rauwolscine is a plant-derived alkaloid closely related in structure to yohimbine, found in the bark of Pausinystalia yohimbe and some other plants. It is sometimes called alpha-yohimbine and is sold as a standalone supplement or in combination fat-loss and pre-workout formulas.
Why it’s used
Taken by some for its stimulant-like effects, often marketed for fat loss, focus, or exercise performance, and frequently included in combination pre-workout or thermogenic products.
What the evidence says
There is no NIH Office of Dietary Supplements fact sheet for rauwolscine specifically. Human clinical research on rauwolscine as an isolated compound is very limited; most of what is known about this class of alkaloids comes from studies of yohimbine, its closer-studied structural relative, which is not the same substance. Claims about fat loss or performance for rauwolscine itself have not been established in controlled human trials.
Where we looked
There was no paper to cite here, so this is the search instead — run it yourself and see what we saw.
- PubMed: 0 records · searched August 2026
"Rauwolscine"[Title/Abstract] AND ("dietary supplements"[MeSH] OR supplementation[Title/Abstract] OR supplement[Title/Abstract] OR supplements[Title/Abstract] OR "oral administration"[Title/Abstract]) AND (randomized controlled trial[pt] OR clinical trial[pt] OR meta-analysis[pt] OR systematic review[pt]) AND humans[MeSH] - PubMed: 1367 records · searched August 2026
"Rauwolscine"[Title/Abstract]
This says what this database holds under these terms. It is not a finding that no research exists.
Context
Some pharmacological and animal research on rauwolscine's receptor activity exists, but well-controlled human dosing studies specific to rauwolscine could not be verified to a citable source here. A reviewer looking to upgrade this grade should look for human trials naming rauwolscine or alpha-yohimbine specifically, rather than yohimbine or general 'yohimbe bark extract' studies.
Educational information, not medical or safety advice. Consult a professional for allergies or medical concerns.