I meant to mention too Carol.. the Alt Med Dr. has me come back for retesting once a month to see what is continuing to work, or to see what may not be working--I didn't have much luck with Paracleanse either. When he muscle tested me for it, it did not show as being effective in killing the specific parasites I have. He said it was a good company, Banyan Botanicals- and I used the Neem with it, but I got the tablets, not the actual oil. If I had it to do over again, I would get Neem oil and put drops in my own capsules, and not use the Paracleanse. But, again, different things work for different people.