Stack Genius ingredient guide
Yohimbe
Yohimbe is the bark of the West African tree Pausinystalia johimbe, containing the alkaloid yohimbine and related compounds with alpha-2 adrenergic receptor activity.
Overview
Yohimbe is the reddish-brown inner bark of a tall evergreen tree native to West and Central Africa. Its principal active compound, yohimbine, is a plant alkaloid that blocks alpha-2 adrenergic receptors, which drives noticeable increases in heart rate, blood pressure, and adrenergic tone. Yohimbine has a long traditional use history and is also available as a prescription drug in some countries.
In dietary supplements, yohimbe bark and standardized yohimbine extracts appear in fat-burner and thermogenic blends, male sexual-support formulas, and pre-workout stacks. Products vary widely: some list "yohimbe bark powder" without any yohimbine content specified, while others list yohimbine HCl (a purified form) at defined milligram amounts.
This is one of the more genuinely potent supplement ingredients on the market, and it is not gentle. NCCIH specifically flags yohimbe among herbs with concerning adverse event reports. Anyone considering it should approach it as a bioactive compound with real cardiovascular and psychiatric effects, not as a routine wellness ingredient.
Key takeaways
- Yohimbe bark contains yohimbine, an alpha-2 adrenergic receptor blocker with real cardiovascular effects.
- It appears in fat-burner, thermogenic, and male sexual-support supplement categories.
- Adverse event reports include elevated heart rate, blood pressure, anxiety, and worse.
Practical guidance
What to know before adding Yohimbe
Evidence snapshot
Yohimbine has been studied clinically, particularly in male sexual function contexts, and has a real pharmacological profile. However, dietary supplement forms are notoriously inconsistent, with independent testing showing yohimbine content that ranges from far less than labeled to far more. NCCIH highlights yohimbe as a supplement associated with concerning adverse event reports and calls for caution.
What to look for on the label
The two most important things are whether the product uses raw bark powder (unpredictable potency) or purified yohimbine HCl (defined dose), and whether the label lists the exact milligrams of yohimbine per serving. Avoid proprietary blends that hide yohimbine content. Trustworthy products publish third-party testing of alkaloid content.
What makes a better product
A stronger yohimbe product uses standardized yohimbine HCl at a clearly stated milligram dose, avoids stacking multiple stimulants (caffeine, synephrine, DMHA) that compound cardiovascular strain, and prints prominent contraindication warnings. Because the ingredient has been linked to inconsistent bulk sourcing, third-party alkaloid testing is more important here than in most categories.
Watch-outs
Reported adverse effects include rapid heart rate, elevated blood pressure, anxiety, panic attacks, tremors, headaches, GI upset, insomnia, and, in severe cases, cardiac events. It is contraindicated in cardiovascular disease, hypertension, anxiety disorders, kidney disease, and pregnancy. Interactions with MAO inhibitors, antidepressants, stimulants, and blood pressure medications are significant.
Dosing & Timing
Purified yohimbine HCl studies use doses of about 5 mg to 20 mg per day, often split. Bark-based products cannot be dosed reliably because alkaloid content varies. Cycling and avoiding late-day use are common because of stimulant effects on sleep. Starting extremely low is advised for anyone new to it.
Safety and interaction context
Contraindicated in high blood pressure, cardiovascular disease, anxiety disorders, PTSD, kidney or liver disease, and pregnancy. Serious interactions include MAO inhibitors, tricyclic antidepressants, SSRIs, stimulants, and blood pressure medications. Not appropriate for use with alcohol. Adverse events are more common than most consumers expect. Anyone considering it should discuss with a clinician first.
Sources
- NCCIH Herbs at a GlanceYohimbe safety and evidence overview
- FDA Dietary SupplementsRegulatory context for stimulant ingredients
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