Sunfood Pure MSM Capsules Dietary Sulfur Supplement 400caps, 750mg Sunfood Pure MSM Capsules Dietary Sulfur Supplement has the following features: MSM is a naturally-occurring form of dietary sulfur found in fresh, raw foods and rain water. All of the MSM in the capsule are extracted from these natural sources and is extensively tested to be free of contaminants. Sulfur is a vital mineral that is needed by the body for normal structure and function. It makes up the protein and connective tissue that comprises our body mass, assists enzymes in performing chemical reactions, and protects us from oxidative stress and harmful effects of toxicity. MSM can soften leathery internal tissues by rebuilding connective tissue with elastic sulfur bonds. It can also increase flexibility, as well as hasten recovery time from sore muscles and athletic injuries.