Naturopathic methods for curing yeast infections include using natural substances such as probiotics and boric acid suppositories, reports Cathy Wong for About.com. Probiotics can be taken orally and used as a suppository. However, boric acid must only be used topically, as it is toxic if ingested.
Probiotics are live microbes that can help to suppress the growth of yeast in the vagina and the digestive tract. Lactobacillus is the most commonly used probiotic species for treating yeast infections, states About.com.
A boric acid suppository has mild antifungal properties, but it can be toxic and irritating to the skin. The suppository should not be used for a prolonged period of time or at a higher dose than is recommended by a health professional, explains About.com.