Yucca

Various species of yucca plant were used as food by Native Americans and early California settlers. Yucca contains high levels of soapy compounds known as saponins that also made it a useful natural shampoo and soap.

Used

When taken for a long period of time, yucca is said to reduce osteo- and rheumatoid arthritis symptoms. However, the only scientific evidence for this claim comes from one preliminary study. Animal and test tube studies suggest that various yucca extracts may have antiviral, antifungal, antiprotozoal (e.g., Giardia) and antibacterial effects. Yucca extracts are also widely used to enhance the foaming effect of carbonated beverages.

Dosage

The standard dosage is 2 to 4 tablets of concentrated yucca saponins daily.

Safety Issues

Yucca is generally accepted as safe based on its long history of use as a food. However, it sometimes causes diarrhea if taken to excess. Safety in young children, pregnant or nursing women, or those with severe liver or kidney disease has not been established. According to one report, yucca possesses significant estrogenic activity and, as such, should not be taken by women who have had breast cancer.