Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Life Saver

The arthritis in my right knee doesn't exist while taking this form of MSM. I can perform athletically like a teenager. I once got out the the habit of taking it on a daily basis, and the arthritis in my knee became imflammed, and my athletic performance reverted to that of a 90 year old woman. I take it at night because it makes me fall asleep quickly, and sometimes it gives me nightmares. But the dreams are entertaining and pretty creative, I couldn't consciously think of the motion pictures movies that I dream while sleeping. For some people, it doesn't make them sleepy at all. Oh yeah, almost forgot to mention that it also keeps my asthma symptoms at bay. Works well on my hair, nails and skin as well.