Methylsulfonylmethane (MSM) is a chemical found in green plants,
animals, and humans. It can also be made in a laboratory. MSM has become
popular because of the book The Miracle of MSM: The Natural Solution
for Pain.

People take MSM by mouth and apply it to the skin for chronic pain,
osteoarthritis, joint inflammation, rheumatoid arthritis, osteoporosis,
inflammation around the joints (bursitis), tendinitis, swelling around
the tendons (tenosynovitis), musculoskeletal pain, muscle cramps,
hardened skin condition called scleroderma, scar tissue, stretch marks,
hair loss, wrinkles, protection against sun/wind burn, eye inflammation,
oral hygiene, gum disease, wounds, cuts, and abrasions/accelerated
wound healing.

People also take MSM by mouth for relief of allergies, chronic
constipation, “sour stomach”, ulcers, a bowel disease called
diverticulosis, premenstrual syndrome (PMS), mood elevation, obesity,
poor circulation, high blood pressure, and high cholesterol. It is also
taken by mouth for type 2 diabetes, liver problems, Alzheimer’s disease,
to control snoring, lung disorders including emphysema and pneumonia,
chronic fatigue syndrome, autoimmune disorders (systemic lupus
erythematous), HIV infection and AIDS, and cancer (breast cancer and
colon cancer).

MSM is also taken by mouth for eye inflammation, mucous membrane
inflammation, temporomandibular joint (TMJ) problems, leg cramps,
migraine, headaches, hangover, parasitic infections of the intestinal
and urogenital tracts including Trichomonas vaginalis and Giardia, yeast
infection, insect bites, radiation poisoning, and to boost the immune
system.