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Description
Glucosamine Chondroitin MSM 120 capsulesWhat is Doctors Best Glucosamine Chondroitin MSM with OptiMSM? Doctors Best Glucosamine Chondroitin MSM with OptiMSM supports joint structure, function and comfort. It is a potent combination of three clinically proven, purified ingredients that help the body manufacture proteoglycans in healthy joints. Proteoglycans contribute to the maintenance of sound joint structure, ultimately enhancing healthy joint function. Glucosamine sulfate is extracted
What is Doctor’s Best Glucosamine/Chondroitin/MSM with OptiMSM®?Doctor’s Best Glucosamine/Chondroitin/MSM with OptiMSM® supports joint structure, function and comfort. It is a potent combination of three clinically proven, purified ingredients that help the body manufacture proteoglycans in healthy joints. Proteoglycans contribute to the maintenance of sound joint structure, ultimately enhancing healthy joint function.
Glucosamine sulfate is extracted from chitin, a long-chain polymer consisting of many glucosamine molecules linked together. Chitin forms structural frameworks in many living things, including aquatic crustaceans. Doctor’s Best glucosamine is purified and then sulfated and stabilized with potassium chloride. It is processed to remove residues of protein and impurities, yielding pure glucosamine sulfate as the final material.
Chondroitin sulfate is manufactured from bovine cartilage. Doctor’s Best uses chondroitin sulfate with a purity of 90 percent or greater. Quality assurance testing is performed using sophisticated laboratory analytical methods.
MSM is an excellent dietary source of bioavailable organic sulfur. Doctor’s Best MSM features OptiMSM®, a highly purified form (99.9% pure) of methylsulfonylmethane (MSM). Since the amount of MSM found naturally in living materials is too small to be extracted, the MSM used for dietary supplements is synthesized. The makers of OptiMSM® developed a four-stage process to separate impurities including heavy metals and other contaminants and is 99.9% pure MSM. Each batch exceeds the United States Pharmacopeia (USP) monograph standards for MSM, and is validated by testing in independent laboratories.
How does it work?
Chondroitin sulfate and keratin sulfate, are long polysaccharide molecules called glycosaminoglycans. Chondroitin sulfate and the other glycosaminoglycans strongly attract water due to the negative charges of their sulfate groups. These negative charges also repel each other, creating spaces between glycosaminoglycan side chains where water can enter. This combination of solid and liquid gives joints a compressible qualitywhich may ultimately enhance healthy joint function.
In healthy joints, glucosamine is a fundamental building block for proteoglycans and glycosaminoglycans. Glucosamine sulfate (GS) helps to maintain joint health through its ability to both act as a component of and stimulate formation of glycosaminoglycans and the hyaluronic acid backbone essential for the formation of proteoglycans in healthy joints.
MSM contains two oxygen atoms and two methyl groups bound to a sulfur atom. As it donates its methyl groups, MSM enables important metabolic functions, including energy transduction and enzyme regulation. MSM’s use in joint stems from its organic sulfur support of the disulfide bonds that reinforce collagen fibers, a property that’s believed to promote joint integrity and resilience.
Why should I take Doctor’s Best Glucosamine/Chondroitin/MSM with OptiMSM®?
Healthy joints may get worn away by sports injuries, overuse, or wear-and-tear that can cause joint pain. Glucosamine helps stimulate the manufacture of proteoglycans in healthy joints. Chondroitin is a component of healthy joints that attracts water to the tissue, which helps the joint stay elastic and function as a shock absorber for joints. MSM is a natural sulfur to help form antioxidants and serve as a key structural nutrient in healthy joints and may help to give shape, strength and support to other tissues within the body. This combination of ingredients has been proven to support joint structure, function and comfort.*
Ingredients
Each serving provides 1500mg of glucosamine sulfate, 1200mg of chondroitin sulfate, and 1000mg of MSM*
Non-GMO/Gluten Free/Soy Free
Directions & Precautions
Consult your healthcare provider before use if you are taking any prescription medications or if you have a medical condition.
Take 4 capsules daily with food or as recommended by a nutritionally-informed physician
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4.5 ★★★★★
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Product Reviews
★★★★★ 5
Perfect socket for the job
Size: 24mm, Color: Green, Size: 24mm, Color: Green
I purchased this 24mm socket specificaly to remove the oil filter housing on my Ram Promaster 2500 truck.
Since there is limited space to get a standard socket in this area, this low profile socket was able to do the job without requiring me to loosen and push aside other components.
I like that this socket is light weight, made of aluminum with large easy to read size eched into the body. the oil filter housing is made of plastic and does not require a beefy heavy steel socket. The walls on this socket are plenty thick as to cause me no concern about durability.
To me, the green color is a nice touch as will be easy to spot in my socket set for the oil changes.
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Reviewed in the United States on March 28, 2026
★★★★★ 5
Perfect Tool for the Job – Compact, Durable, and Well-Made
Size: 32mm, Color: Green
I bought this 32mm oil filter socket specifically for my VW TDI, and it worked like a charm. The low-profile design is a lifesaver—there’s barely any clearance where the oil filter sits, and this tool fit in perfectly without me having to wrestle with it or remove other parts.
The quality is excellent—it’s made from aerospace-grade aluminum, which means it’s both lightweight and solid. The anodized finish looks great and gives me confidence it won’t rust or degrade like some cheaper tools I’ve used in the past. The 6-point hex design grips the cap snugly and doesn’t round it off, even with decent torque applied using a standard 3/8" ratchet.
I’ve already used it on a couple different vehicles (including a BMW and a Chevy) and it hasn’t slipped once. It’s a small tool, but it solves a big headache. For anyone doing their own oil changes—especially if you're dealing with tight engine bays—this socket is 100% worth it.
Bonus points for the bright green color—it’s easy to find in the toolbox! Highly recommend.
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Reviewed in the United States on July 13, 2025
★★★★★ 4
Decent Quailty
Size: 28mm, Color: Red
Great for taking off the Cummins 6.7 fuel filter cap. 28MM nice color making it easy to spot should you drop it in the engine compartment. Appears to be made of a bit soft material. IMHO don't think it would take a lot of torque. But again it’s to remove a plastic fuel filter cover so you should not be applying a lot of force on it to begin with.
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Reviewed in the United States on March 21, 2026
★★★★★ 5
Saved my plastic oil filter cap. A must-have for Chrysler owners.
Size: 24mm, Color: Green
I struggled for a long time trying to remove the plastic oil filter cap on my Chrysler. I almost broke it a couple of times using the wrong tool. My friend told me to buy this socket.
I was worried because it's aluminum. I thought it might not be strong enough. But it works great.
What's good:
The 24mm low profile fits perfectly on the plastic cap.
The aluminum is strong — it grips the cap well without damaging it.
6-point design gives good grip, won't strip the plastic.
I bought it once and use it every time now.
How I use it:
I only use this socket for removing the oil filter cap. Nothing else. I don't want to break it.
Bottom line: If you have a plastic oil filter cap (especially on a Chrysler), buy this socket. It will save you from breaking an expensive part. One of those tools you don't need often, but when you need it, you're glad you have it.
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Reviewed in the United States on April 9, 2026
★★★★★ 5
Great Product
Just as described and prompt shipping
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Reviewed in the United States on January 18, 2026