Webas a cutting agent for methamphetamine, msm offers many advantages. Pure msm is an odorless, white, crystalline powder that is highly soluble and mixes readily with most. Webresearch has shown that meth use is associated with a heightened sex drive and appetite, leading to hiv sex risk behaviors [6, 7, 8, 9, 10, 11]. Indeed, studies have linked hiv. Webwhat many don’t realize is methylsulfonylemethane (msm) does crystalize when mixed with meth, and often gets added to the drug, resulting in diluted crystals.