pretty sure grapefruit seed extract can kill internal parasites (if i remember right) but you should see a dr for health concerns because parasites can travel to other parts of the body to live besides intestine. such as in leg fat, brain, lungs. not to freak you out at all. lol i use grapefruite seed extract liquid faithfully for anything from a few drops to purify my tap water, killed warts with it, killed tooth infection with it, killed streph throat with it, killed mrsa with it, thrush also. has a bunch of homeopathic remedies

lol ive used it for many years