It may have a funny name, but this herb is a must-have for your medicine cabinet. Also called taheebo or lapacho, this herb is native to South America and was introduced in the U.S. in the 1980s.

Its antiviral, antibacterial, immune-enhancing properties make it one of the most powerful herbs.

Pau d’ Arco bark

The herb boosts the body’s immunity and knocks that potential cold or flu out before it gets worse. The inner bark comes in loose and powder form and can also be bought as a tincture.

Nutrient content: beta-carotene, beta-sitosterol, lapachol

Benefits: Fights bacterial and viral infection. Good for candidiasis, warts and all types of infection. Helpful for chronic illness, allergies, cardiovascular problems, inflammatory bowel disease, tumors and ulcers. Cleanses the blood.