Yohimbine

Does it work?

• -Only if you're already lean and training fasted. Yohimbine blocks the alpha-2 receptors that guard "stubborn" fat (lower belly, hips, thighs), and one small trial in lean soccer players found a real body-fat drop. But the effect is killed by insulin, so it only does anything on an empty stomach — and if you're not already lean, fat mobilization isn't your bottleneck anyway. It also has a genuine side-effect profile, which is why it's a niche tool, not a default.

How much · when

• -Take it fasted only. Any food — especially carbs — raises insulin, which shuts down the alpha-2 effect and wastes the dose.
• -Roughly 0.2 mg/kg bodyweight (about 14-20 mg for most people), 20-30 minutes before fasted cardio or training.
• -Use yohimbine HCl, not 'yohimbe bark' extract — bark products are wildly inconsistent and often mis-dosed.
• -Start at half a dose to test tolerance. Skip it late in the day; it's a stimulant and will wreck sleep.

The catch

• -Only one small RCT (20 lean soccer players) shows a body-composition benefit. It's promising but thin evidence, and it was in already-lean athletes.
• -Insulin abolishes the effect, so it's useless after meals — it only earns its keep in a fasted window you have to actually train in.
• -If you're carrying real fat to lose, your limiter is the energy deficit, not fat mobilization. Yohimbine adds little over diet plus training.

Better option

• -If you just want a fat-loss edge, a calorie deficit plus caffeine before training does more for almost everyone — save yohimbine for the last lean-out miles.

Safety

• -Raises heart rate and blood pressure and can trigger anxiety, jitters, or panic. Avoid it if you have hypertension, heart issues, or any anxiety/panic disorder.
• -Higher doses risk arrhythmia and have been linked to serious events; more is not better — stay near the bodyweight-based dose.
• -Interacts with antidepressants (especially MAOIs/SSRIs), stimulants, and blood-pressure meds. OTC labeling is often inaccurate, so dose is hard to trust. Skip if pregnant or breastfeeding.

Key research

• Ergogenic and Sympathomimetic Effects of Yohimbine: A ReviewNeurol Int · 2024 · Review
• Dietary supplements for body-weight reduction: a systematic reviewAm J Clin Nutr · 2004 · Systematic review
• Yohimbine for erectile dysfunction: a systematic review and meta-analysis of randomized clinical trialsJ Urol · 1998 · Meta-analysis
• Yohimbine as a treatment for erectile dysfunction: A systematic review and meta-analysisTurk J Urol · 2021 · Meta-analysis
• Yohimbine: the effects on body composition and exercise performance in soccer playersRes Sports Med · 2006 · RCT

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