Antibiotics and a poor diet can destroy good bacteria, triggering stomach troubles and yeast infections.
5 of 6 | Boost your immune system
To fight the yeast and prevent future occurrences, Mary Bove, N.D., a medical herbalist and licensed midwife practicing in Brattleboro, Vt., recommends the immunity-boosting herbs astragalus root and ashwaganda root—especially if the problem is chronic. "They're both very safe, and you can use them together," she says. "Take 500 mg of each, twice a day."