Why Glucosamine HCl?, read below: Glucosamine HCL vs Glucosamine Sulphate:

Stability: Glucosamine and glucosamine sulphate degrade easily, especially if damp. To try to overcome this manufacturers add either sodium or potassium chloride, in addition to the sulphate. This means that over two fifths (40%) of its weight may be made up of additives. To prevent further destruction, vitamin C can be added as a preservative and calcium carbonate as a desiccant.

Some glucosamine sulphate preparations claim to be salt free when in fact they are actually SODIUM free. They still contain up to 25% potassium chloride. If they did not, they would degrade rapidly into a black mush. On the other hand glucosamine hydrochloride is naturally stable and requires no added salt or other preservatives.

Purity: Pure glucosamine sulphate can have as little as 59% 'active' glucosamine because of the chemically added sulphate and salt, whilst pure Glucosamine hydrochloride has up to 88%. DEVA Vegan Glucosamine hydrochloride mg for mg, can contain up to a third more active glucosamine.

Where does glucosamine come from? Glucosamine sulphate is manufactured from glucosamine hydrochloride. Glucosamine hydrochloride can be obtained from any source of cartilage, commonly beef, chicken, pig, shark, clams, shrimp or even whale. Chondroitin can also obtained from these sources, and there are no plant altematives. DEVA Nutrition has specifically chosen an alternative source: non-GMO corn, thus making its glucosamine 100% animal-free.

Why choose DEVA's Glucosamine hydrochloride? Glucosamine is readily absorbed by the body and into cartilage. Glucosamine sulphate is converted by stomach acid into the hydrochloride before absorption. A true mg to mg comparison shows that the hydrochloride provides more glucosamine than the sulphate salt and this may be the reason why some people prefer to choose glucosamine hydrochloride.