I think I was taking 2000 mg twice a day. After about 3 weeks when I did a coffee enema the bowl was literally full of clear flukes. I wasn't taking it for parasites, I have candida and was trying to help with that and it is good for hair. After it happened I read up on it and it said that MSM puts a coating on your intestines that causes the parasites to lose their grip so then the force of the enema knocked them loose. I think that is what happened this time also, I was taking slippery elm to help with my leaky gut and I think it coated my intestines as well. I wasn't after parasites either time this happened but I'm going to do this often to make sure I get them all out.
A previous poster responded that they were red because they are sucking my B12 which makes sense because I'm deficient in B12 and now I know why!