Warburgia salutaris (Pepper-bark Tree)

Warburgia salutaris is a medicinal plant rather than a dietary staple, so macronutrient data is limited; however, bark and leaf analyses indicate moderate fiber content (estimated 15-25% dry weight in bark material) and trace protein levels (approximately 3-6% dry weight in leaves). The plant's primary nutritional and therapeutic value lies in its bioactive compounds: Sesquiterpene dialdehydes are the dominant class, with warburganal (muzigadial isomer) and polygodial present at approximately 0.1-0.5% dry weight in bark extracts, responsible for the characteristic pungency and antimicrobial action. Drimane-type sesquiterpenes including isodrimenin and confertifolin are present at trace-to-low concentrations (estimated 0.05-0.2% dry weight). Tannins and polyphenols contribute to antioxidant capacity, with total phenolic content estimated at 50-120 mg GAE/g dry extract in bark. Flavonoids are present at approximately 10-40 mg QE/g dry extract. Alkaloids have been identified in minor quantities (<0.1% dry weight). Essential oils in leaves contain caryophyllene, limonene, and alpha-pinene as principal volatile components. Minerals detected include calcium, potassium, magnesium, and iron at trace levels typical of woody bark material. Bioavailability note: sesquiterpene dialdehydes show good lipophilic absorption but are highly reactive; traditional aqueous decoctions may yield lower concentrations of these compounds compared to ethanol extracts.