IGF1 is natural hormone in the body. Just working out will increase it. You can buy it in a “supplement” form, but I don’t know if it’s legal, because it’s considered a steroid. My thread is more on how -enone (IFM) and -nol works in the body. It briefly touches on women smelling mones. I think there may be more about that specifically in the phero research forum. Here’s the link to my post.