You mentioned allergies in the above post so here is my 2 cents about that. I believe allergies are a symptom of parasites inside the body. After 3 days on Paraguard by Zahler bought on Amazon, I have only had a stuffy nose 3 of 4 times and no other allergy symptoms. Prior to Paraguard, I took 2 different meds for allergies every single day, and always wore a mask outdoors. I had SEVERE allergies.