Anti-Yeast Infection and HPV protection glide containing Caarrageean (Sea Kelp) and Guava Bark anti-bacterial extract. Carrageenan. as an ingredient. inhibits the infectious ability of viruses that cause cervical cancer and genital warts. Guava Bark is used in the Amazon to prevent yeast infections. applied to wounds or used as a douche to help and prevent yeast infections. In Brazil. guava is considered an astringent for wounds. 4 fluid ounces.