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MSM and Joint Care
By David Tolson

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MSM (methylsulfonylmethane, dimethyl sulfone, DMSO2) is a naturally occuring thiol compound and one of the more popular dietary supplements. It is 34% elemental sulfur and has a metabolic relationship with methionine, and is found in small amounts in the diet in sources including milk, grains, meat, eggs, fish, fruit, tea, coffee, and raw vegetables [2-3]. MSM is a metabolite of dimethyl sulfoxide (DMSO), a compound that has been researched for a wide range of therapeutic purposes, most notably joint support. About 17% of orally administered DMSO metabolizes into MSM [1], and the two compounds have many related properties.  However, MSM may pose a few advantages, as it does not metabolize into the volatile compound dimethyl sulfide as DMSO does, and also does not cause the garlic-like body odor associated with DMSO use [1-2].

It is important to note that although the evidence for the claims made for MSM is still weak, it is an extremely safe supplement. A toxicological study in rats found no adverse effects from 2 g/kg acutely or 1.5 g/kg for 90 days; this is about the equivalent of six times the maximum recommended human dose [3]. Toxicity has not been reported in animal studies, adverse effects have not been noted in human studies, and long-term users of 2 g or more daily have reported no ill effects [2]. However, there is one concern. MSM has been detected in the brains of humans taking MSM supplements, where it is not normally detectable [3]. This was not associated with changes in the concentrations of important cerebral metabolites, and this combined with the animal data would indicate that it is unlikely that MSM has any important effect on the brain [4].

The recommended dosage for MSM is in the range of 1-6 grams daily, although some physicians have recommended up to 20 grams daily [3]. A study in 1975 indicated that MSM recovery after oral administration was only 3%, suggesting utilization or modification in the gut or liver [3]. This may be why a high dose is needed, but it is also noteworthy that the presence of detectable MSM in the brain after supplementation would indicate that a supplement is enough to significantly increase plasma levels of the compound. Given the present information, it can be concluded that MSM is a safe supplement that may be effective for a variety of purposes, primarily for joint support, but further studies are needed to prove efficacy.

If you have any questions or comments regarding this article, please email dvdtlsn@bulknutrition.com.


No part of this article may be reproduced in any form without the permission of David Tolson or Mike McCandless.


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References
1. J Altern Complement Med. 2002 Apr;8(2):167-73. A multicentered, open-label trial on the safety and efficacy of methylsulfonylmethane in the treatment of seasonal allergic rhinitis. Barrager E, Veltmann JR Jr, Schauss AG, Schiller RN.

2. Altern Med Rev. 2002 Feb;7(1):22-44. Sulfur in human nutrition and applications in medicine. Parcell S.

3. Food Chem Toxicol. 2002 Oct;40(10):1459-62. Toxicity of methylsulfonylmethane in rats. Horvath K, Noker PE, Somfai-Relle S, Glavits R, Financsek I, Schauss AG.

4. Toxicol Lett. 2001 Sep 15;123(2-3):169-77. Accumulation of methylsulfonylmethane in the human brain: identification by multinuclear magnetic resonance spectroscopy. Lin A, Nguy CH, Shic F, Ross BD.

5. J Altern Complement Med. 2002 Jun;8(3):229. Methylsulfonylmethane as a treatment for seasonal allergic rhinitis: more data needed on pollen counts and questionnaire. Gaby AR.






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