“Well, Glucosamine is available in two forms, glucosamine hydrochloride (HCl) - from plants, and Glucosamine Sulphate (2KCl) - derived from shellfish (from shrimp shells). I have found the 2KCI completely ineffective on back pain (I have damaged and ongoing issues in my Lumbar region - L3, L4 and L5). Glucosamine hydrochloride (HCl) I personally found to be nothing short of a miracle cure. I take two of these each day (the first 3/4 days I doubled up!). I have NO PAIN whatsoever. Highly recommended. I bought two of the 100 tabs bottle, and it came very quickly with free postage & packing. Context: I am a 59-year-old male. Try them, you won't believe the results.”