... instruments,such as HPLC,UV,GC,AA etc. Action: 1.Grapefruit Seed Extract are well known as an anti-fungal agent ... bacteria. 2.A biologically active natural ingredient found in the Grapefruit Seed Extract kills strep, staph, salmonella, e.coli, candida, herpes ... , influenza, parasites, fungi and traveler's diarrhea, and Grapefruit Seed Extract is used as an antibiotic, anti-fungal, anti ...