I don't know about the parasites and arthritis. I used to have severe Arthritis - a form similar to rheumatoid. I was in terrible pain and crippled. I went to a naturopath, had food allergy testing and went on anti-fungals and got rid of candida. It took about 8 months of avoiding my allergens (wheat, milk, eggs, soy) to get better, but today I teach PE and do triathlons. Regular MD's tell me I'm nuts, that I should just have taken the medication, but I think they're a bunch of quacks. I am trying to get rid of parasites now (brought into our home through our kids) and don't have any Arthritis symptoms, but I could very well have had parasites when I did have the Arthritis that I got rid of through all the cleansing and candida program.