Preservation of the biological activity of undenatured type II collagen

The instant invention is the storage of Type II collagen containing tissue in carbonated water. Such Type II collagen is useful for alleviating the symptoms of arthritis in mammals as well as the treatment of arthritis in mammals. Such Type II collagen is also useful for the prevention of arthritis in mammals. The instant invention is also a method for the preparation of a nutritional supplement that includes the steps of: (a) separating water-insoluble undenatured Type II collagen containing animal tissue from animal tissue not containing Type II collagen; (b) subdividing and sterilizing said tissue under conditions which do not change the original structure of the Type II collagen to produce a subdivided and sterilized product; (c) packaging the subdivided and sterilized product in carbonated water.