Doctor's Best MSM (1500mg) is a high-potency sulfur supplement featuring OptiMSM®, a highly purified form of methylsulfonylmethane designed to support joint health, mobility, and connective tissue. This 120-tablet bottle typically provides a 4-month supply at a standard dose. 

Producing Company

This product is manufactured by Doctor's Best, Inc., a science-based nutritional supplement company founded in 1990 and headquartered in Tustin, California, USA. It is currently a subsidiary of the Xiamen Kingdomway Group. 

Key Benefits & Uses


Joint Comfort & Mobility: Helps maintain joint structure and function by providing organic sulfur, a key component of collagen and keratin.
Connective Tissue Support: Promotes the health of cartilage, tendons, and ligaments, helping to reduce joint soreness after exercise.
Skin, Hair, and Nails: Sulfur is often called "nature's beauty mineral" because it helps strengthen the keratin and collagen fibers responsible for skin elasticity and hair/nail strength.
Antioxidant Support: Helps the body produce glutathione, a critical antioxidant that protects cells from oxidative damage and supports a healthy immune response. 


Primary Ingredients


MSM (Methylsulfonylmethane as OptiMSM®): 1500mg per tablet. OptiMSM® is purified via a multi-stage distillation process to ensure 99.9% purity.
Other Ingredients: Microcrystalline cellulose, stearic acid, magnesium stearate (vegetable source), and a modified cellulose coating. 


Administration and Usage


Dosage: For adults, take one (1) tablet daily with or without food, or as recommended by a nutritionally informed physician.
Form: Large tablets designed for easy swallowing with water. 


Safety & Side Effects


General Safety: MSM is generally recognized as safe (GRAS). It is Non-GMO, Gluten-Free, Soy-Free, and Vegan.
Common Effects: Some individuals may experience mild gastrointestinal upset, such as bloating or nausea, if taken in high doses.
Precautions: Consult a healthcare provider if you are pregnant, nursing, or have a pre-existing medical condition before use.