The natural remedy for UTIs that most people commonly think of is cranberries. But, consuming cranberries, cranberry supplements, or cranberry juice for a UTI is only somewhat effective. However, when it comes to preventing a UTI, cranberry supplements may be beneficial. The #1 remedy for a UTI is a combination of oregano oil capsules and thyme capsules. Both oregano and thyme are potent natural antibiotics. The oregano oil supplement should be at least 60% carvacrol to be beneficial.