According to the Global Healing Center, grapefruit seed extract has been used throughout South American, Asian and European history as a powerful antiviral and antibacterial remedy. High in antioxidants and bioflavonoids, grapefruit seed extract is used as a natural immune system booster and stimulator. Because of grapefruit seed extract's antiviral, anti-mycotic and anti-protozoan capacities, it is also a powerful nontoxic disinfectant.
Grapefruit seed extract has shown an ability to help with the healing of both wounds and scar tissue, according to the Global Healing Center. As of 2014, it has been studied and shows promising results in providing anti-cancer benefits, as well as cholesterol-lowering effects due to the presence of the flavonoid naringin. Grapefruit seed extract is effective in treating toenail fungal infections; sinus, skin and vaginal infections; and yeast infections. It is also used to create a nontoxic cleaner for fruits and vegetables.
According to Global Healing Center, grapefruit seed extract is used to inhibit the growth of harmful intestinal flora while not limiting the effect of healthy gut flora. It is also used as a natural preservative in cosmetics. As one of the world's most alkaline-forming foods, it helps balance pH in the body to improve overall health.
Grapefruit is nutrient-rich, containing vitamin C, pectin, fiber and potassium; its antioxidant benefits help protect the body from cell damage in addition to reducing high cholesterol, according to WebMD. Its ability to kill bacteria and fungus also allows it to prevent mold growth, preserve food and water and kill parasites, making it very useful for farmers. Its oil and seed extracts are used extensively in cosmetics, household cleaners, soaps and fragrances, and it is used for disinfecting meats, fruits, dishware and kitchen surfaces. Alternatively, the oil of the extract can improve hair growth, tone the skin, reduce muscle fatigue and treat oily skin and acne.