I bought this based on some of the rave reviews on this site. Took it as instructed for a total of 8 weeks. The good part was that it gave me lots of energy and I slept well. However, it gave me LOTS and LOTS of clogged pores, blackheads and uneven (=bumpy) skin texture. At first I thought it was some form of purging so I stuck to it, drank lots of water and waited it out but my skin only got worse. I then started frantically researching online about MSM and found out that for quite a few people, it causes breakouts that go beyond the "purging" stage. After many hours of research, I also learned that since MSM helps promote keratin which serves as a "glue" for skin tissue, it can end up binding dirty and oil and dead skin cells for certain people who may be it-prone with oily skin. This product should really come with a warning and with clear instructions. The only silver lining in all that ordeal was that since it does have an anti-inflammatory effect, my blackheads and pimples did not go into full-raging angry inflamed mode. Still, I would be hard-stretched to say it gave me good skin. I normally have clear (albeit oily) skin. I have now been off this supplement for 2 weeks and am still un-do all the damage it has done. Oh and one other good thing is that it did give me strong nails. But having strong nails with bad skin isn't really my thing. The price is ridiculous, too. Oskia claims that it is "pure" but it is not 100% MSM, either. (It has some fillers).