MSM MSM: Sulfur Power for Detox & Biofilm Support MSM (Methylsulfonylmethane) is a naturally occurring sulfur compound that goes far beyond joint and skin support. It plays a critical role in cellular repair, detoxification, and shifting microbial environments . How MSM Supports Root-Cause Healing Cellular permeability: MSM keeps cell membranes flexible, allowing nutrients in and toxins out — essential for clearing fat-soluble toxins from parasites, mold, and heavy metals.