MSM has been mentioned frequently on this list, so I thought I would mention my 
experience with it.  About 5 years ago I had a problem with my heart skipping 
beats occasionally.
A friend got me some MSM, not knowing my problem and suggested a teaspoon in 
water or juice daily. One dose and the next day and after that the heartbeat 
was normal.
I continued on it for about a year and stopped taking it.  My Doctor had told 
me the Medication for this, I couldn't take since it would react with something 
I was already on.
I contacted Dr Jacobs and discussed it with him and he said he had never heard 
of MSM helping this problem.
Recently the skipping returned and I started on the MSM and two days later the 
heartbeat is back to normal. I hope this information might be helpful to 
someone.

Bill