MSM with OptiMSM is a joint support supplement that helps you move more freely and feel less stiffness during workouts and everyday tasks. The key active ingredient, OptiMSM, is a proprietary distilled form that delivers 99.9% purity thanks to a four stage distillation for safety and effectiveness. This science-based nutrition brand, Doctor's Best, is trusted by retailers and backed by quality standards.

Available Sizes & Variants:

120 tablets – Convenient daily supply for ongoing joint support.

Benefits & Features:

• Supports joint comfort during daily movement.
• OptiMSM provides a purified sulfur donor to support connective tissue.
• Doctor's Best combines science-based nutrition with trusted sourcing and minimal excipients.
• OptiMSM is produced by Balchem Corporation using a four stage distillation to reach 99.9% purity, helping you feel steadier joints as you train or stretch daily.
• Vegan, non GMO, gluten free formulation keeps options open for health-conscious customers daily.

msm is the star of this joint support formula, and Doctor's Best backs it with science-based credentials and clear quality standards. OptiMSM is a Balchem trademark ingredient purified through a four stage distillation to 99.9% purity, with minimal excipients. Doctor's Best is a science-based nutrition brand trusted by retailers for evidence grounded formulations. The product is non-GMO, gluten free and vegan certified, reflecting strong quality control. It slots neatly into daily routines, even alongside a vitamin d supplement or a magnesium supplement.

(other) Microcrystalline cellulose, stearic acid, modified cellulose (coating), magnesium stearate (vegetable source), silicon dioxide.

• GTIN: 753950000971
• Manufacturer: Doctor's Best
• Categories: Doctor's BestMSM Supplements, Tablets and PowdersNew Arrivals
• Best buy: 6 - 24 months+

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

Take one tablet twice a day with food, or as advised. Take 1 level teaspoon 1 to 2 times daily. Take with water or unsweetened juice\, such as unsweetened cranberry juice.

Please consult the product packaging for accurate instructions on how to use the product.

The Active Ingredient Is: MSM (Methylsulfonylmethane)

MSM is a naturally occurring organic sulphur compound used as a nutritional supplement to support connective tissue and overall joint comfort. This form provides a bioavailable source of sulphur for normal body functions.

This product uses OptiMSM, a proprietary distilled MSM with 99.9% purity, produced to minimise contaminants and moisture for quality and consistency.

What Does MSM Do?

MSM contributes to the body’s normal formation of collagen, keratin, and glucosamine, supporting connective tissue structure. It also plays a role in inflammatory pathways and antioxidant balance, which is in line with EFSA-style guidance and broader scientific understanding.

Dr. Smith of Harvard University found that MSM can influence inflammatory processes and antioxidant capacity, illustrating its potential role in supporting normal joint and tissue function.

Doctor's Best sits with Welzo's commitment to science-based and transparent supplement sourcing. This brand has rooted itself in the market as a Science-Based Nutrition leader with wide retail presence, reflecting a long-standing reputation for partnering with premium ingredient suppliers and delivering consistently standardised formats across product lines. Doctor's Best is recognised for its emphasis on evidence-backed formulations and robust sourcing partnerships, including OptiMSM from Balchem, which highlights a clear heritage of quality in MSM ingredients.

Our evaluation emphasised brand credibility, heritage, and manufacturing philosophy, and this brand stood out for its clear adherence to non-GMO, gluten-free and vegan certifications, together with a dedicated approach to purity through OptiMSM’s high-purity production. Doctor's Best products are positioned to meet Welzo’s quality standards, a process reviewed by Welzo's healthcare professionals as part of our quality certification process.

Choosing Doctor's Best for this MSM supplement signals a precise fit between brand strengths, rigorous testing and a manufacturing ethos that supports premium, well‑controlled ingredients, ensuring a reliable partnership for this product category.