* wild asparagus, desert date, false daisy, curry tree, castor oil plant and fenugreek are natural weapons in fighting life-threatening secondary infections from bacteria and fungi that afflict many cancer patients whose immune systems are damaged by mainstream medicine's chemo and radiation treatments.
* [[Astragalus]] offers benefits in preventing viral infections due to its immunostimulant effects, according to the Huntington College of Health Sciences.
* Black walnut is a natural herb which contains tannins that not only kill fungal overgrowth like candida, but also kill parasites. It may be especially useful for those who suffer from both [[candidadiasiscandidiasis]] and a parasitical infection.
* Grapefruit seed extract (GSE): this citrus extract is a powerful natural antibiotic and is used to inhibit microbes, parasites, bacteria, viruses and 30 types of fungi including Candida yeast.