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MSM has been shown to absorb rapidly within one hour of ingestion and can easily penetrate membranes to permeate throughout several tissues in the body (5)

1 Professor, University of Missouri, Columbia, MO, USA

Developmental iron uptake and axonal transport in the retina of the rat

Devries MC, Phillips SM

doi: 10.1016/s1535-6108(03)00050-3 11 YangWSStockwellBR

If there is a product you are interested in that is not third-party tested, I would at least consider looking for an alternative that IS third-party tested, using the resources discussed earlier in this article
