| Active Ingredient | Uses based on scientific evidence | Grade* |
| yohimbe bark extract (pausinystalia yohimbe pierre ex beille rubiaceae) | it is theorized that yohimbine may improve orthostatic hypotension (lowering of blood pressure with standing) or other symptoms of autonomic nervous system dysfunction. however, yohimbe bark extract may not contain significant amounts of yohimbine, and therefore may not have these proposed effects. more research is needed before a strong recommendation can be made. | c |
*Key to grades
A: Strong scientific evidence for this use;
B: Good scientific evidence for this use;
C: Unclear scientific evidence for this use;
D: Fair scientific evidence against this use;
F: Strong scientific evidence against this use.
