When I was working at Tractor Supply Company, we sold
Methylsulfonylmethane for horses. Methylsulfonylmethane is used to
improve joint and hip conditions in horses. It acts as an anti
inflammatory which could improve movement in the joints and hips
for older horses or help with the longevity of a younger horses
joints and hips. Typically, at TSC, we would get people who would
come in that looked like they knew NOTHING about horses and would
steal it off of our shelves until we locked it up in a class case.
To answer your question, it was explained to me that
Methylsulfonylmethane or MSM, when added to meth, it is used to cut
meth. Cutting meth is used by dealers to get a larger yield from
their product. It is a cheaper way for them to make a much larger
profit.