Bergstrom Nutrition is the world’s leading manufacturer of MSM (methylsulfonylmethane). Its product, OptiMSM, is the purest and only GRAS-designated MSM in the world. Bergstrom Nutrition uses a unique multi-stage distillation process, ensuring optimal purity, quality, and consistency. OptiMSM is made exclusively in the USA and manufactured in a dedicated cGMP-compliant, ISO-registered facility to provide essential traceability and consistency.