Swanson MSM, Powder is a single-ingredient supplement in powder form, packaged in a 454 g quantity. Form: Powder Net quantity: 454 g Brand: Swanson Ingredients MSM (methylsulfonylmethane) 5 g per serving. No other ingredients. Allergens No allergens declared on label. Warnings For adults only. Consult your healthcare provider before using this or any product if you are pregnant or nursing, taking medication, or have a medical condition. Keep out of reach of children. Do not use if seal is broken. Not recommended for pregnant or breastfeeding women. Storage Store in a cool, dry place at room temperature. Keep out of reach of children. Country of origin United States