Please remember to read the labels on these products. Sometimes, you can make your own mistake, so just make sure you know exactly what you are getting before you buy it. Also, many of these products contain the parasites that may be in your system right now. The parasites may not be present, but if they are, they can cause problems. If you have health issues that are related to parasites, like malaria, then there is a chance that you may have a parasite in your body. If you do, and you are having a health problem, it is important to know exactly what kind of parasite is causing the problem so you can get a proper diagnosis and treatment. How do I determine which parasites to avoid? The first step in diagnosing a parasite is to make sure that it is not present in your body. The next step is to find out if you have any symptoms of the parasite. Once you know if your parasites are present, it's time to find out what kind of symptoms they have caused and how they may be related to your symptoms. You can do this by taking a blood sample, by looking at your body, or by seeing if any of your symptoms have been caused by the parasite. You can also look at your symptoms if they have changed or become worse.