I have joint pain and glad to sharing with you that I took this Thomson OsteoPro. Each capsule of Thomson OsteoPro contains 400mg of patented Glucosamine sulfate dipotassium chloride from USA equivalent to 300mg of fully-reacted non-shell fishGlucosamine sulfate. Every batch of raw material is analysed for Glucosamine sulfate content, heavy metals as well as microbial contamination. Free of pesticides, fungicides, yeast, sugar, coloring and preservatives. After taking 2 capsule each meal and twice a day I am feeling better and no more joint pain. To see the results need to take at least 3 bottles for me.