DEFENSE Anti-Yeast Infection and HPV protection glide containing Caarrageean (Sea Kelp) and Guava Bark Anti-Bacterial extract.This is an exciting breakthrough in glides. A recent study conducted by researchers from The National Cancer Institute (NCI) found that -- in a test tube -- 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.