Let me make this very clear...I NEVER had muscle twitches of any kind until taking humaworm. It wasn't until about 2-3 months after finishing that they started, and were pretty severe when they did. I would get them in my arms, calf muscles mainly. They have since died down and become less severe, but I will still occasionally get them mainly everywhere from random spots on my face, like my lip, and frequently my left or right butt cheek. I'm sure a lot of you will chime in and say that they are parasites moving around, but I just don't really believe that. I believe it's just simply the muscles spasming out. But why? My gut instinct just tells me it's damaging effects from the herbs.