Pau d'arco is an herbal supplement that is anti-cancer and antimicrobial, especially anti-candida. Other uses for pau d'acrco include diabetes, ulcers, stomach inflammation (gastritis), liver ailments, asthma, bronchitis, joint pain, hernias, boils and wounds. Calendula extract is known for its antifungal and antimicrobial properties. Notably, in one test-tube study, oil from calendula flowers proved effective against 23 strains of Candida yeast — a common fungus that can cause oral, vaginal, and skin infections.