MSM has been amazing in helping my son with asthma symptoms. I have tried many natural remedies over the years but MSM was the only one that was very effective in the short and long term. Over a period of six months , taking MSm constantly every 12 hours he went from being very sick to be asthma free. It has been an amazing discovery. Does anybody know how long it takes for MSM to get rid of pin worms? Thank you