Methylsulfonylmethane, sometimes referred to as organic sulfur, can cause nausea, diarrhea and headaches, according to Drugs.com. Some individuals experience severe allergic reactions to organic sulfur. Symptoms of an allergic reaction include hives, itching, swelling and difficulty breathing. Individuals experiencing a severe allergic reaction should seek medical care immediately.
Organic sulfur is believed to be safe for most individuals when consumed orally, says WebMD. As of 2015. the safety of its use during pregnancy is unknown, and it is unclear if it is safe to apply to the skin.
Organic sulfur is taken orally for many different reasons, explains WebMD. The most common use is to ease the pain of arthritis, for which there is some evidence to support its effectiveness. Individuals also take it to treat muscle and tendon pain, constipation, obesity, liver disease and a wide variety of other conditions, for which there is little to no evidence supporting its use.
The quality and purity of commercial preparations of organic sulfur vary widely, warns WebMD. Also, the optimal dose of organic sulfur has not been established. Individuals take anywhere from 1,500 milligrams to 6 grams of the product per day to treat arthritis. Sulfur can be obtained from some foods but in much smaller amounts than that supplied by a dietary supplement.