Pausinystalia yohimbe (Yohimbe Bark)

Pausinystalia yohimbe bark is not a significant source of macronutrients or conventional micronutrients, as it is consumed in small quantities as a botanical extract rather than a food. Its profile is dominated by bioactive alkaloids: Yohimbine (primary alkaloid, typically 1-6% of dry bark weight, standardized extracts often 2-15mg yohimbine per dose), corynanthine (alpha-2 adrenergic antagonist, approximately 0.5-1% dry weight), allo-yohimbine, and pseudoyohimbine (minor alkaloids, collectively <1% dry weight). Also contains indole alkaloids including ajmalicine and rauwolscine (alpha-yohimbine, ~0.5-1% dry weight), which contribute to adrenergic modulation. Polyphenolic tannins are present at approximately 8-12% dry weight, contributing astringency and mild antioxidant activity. Flavonoids including quercetin and catechins are present in trace amounts (<0.5%). Crude fiber content is approximately 15-20% of dry bark weight, though fiber is not bioavailable in extract form. Protein content is negligible (<2% dry weight). Bioavailability notes: Yohimbine is rapidly absorbed orally with peak plasma concentration at 45-60 minutes; half-life approximately 36 minutes to 2 hours; bioavailability varies significantly between whole bark preparations (inconsistent alkaloid content, FDA studies show 25-150% variance) versus standardized pharmaceutical-grade extracts. Fat-soluble tannins may reduce yohimbine absorption when taken with high-fat meals.