You can go to my website (www.humaworm.com) and look at the formula page. This can help you see what ingredients will help remove parasites and in what amounts they are used. Easily available herbs are garlic, onion, sage, thyme, Black-Walnut , cloves and ginger. The main ones are the Black-Walnut , Wormwood and cloves. However, do not give Wormwood to children under the age of 12 and/or under 100 pounds. Wormwood is a very powerful narcotic and must be used in small amounts in adults and not at all in children. The children can use the others safely.