Thank you for your post. I have had pinworms for two months now. I took the over the counter Pin X. It did nothing. I started the diatomaceous earth immediately because I had taken it before and am familiar with it. I started with a tablespoon, but increased to two tablespoons a day for the last two weeks. Still have the pinworms and can't get rid of them. My question is how long did you take three tablespoons, twice a day, before totally getting rid of them. I am desperate at this point!