The present invention relates to an orally ingestible food or pet food composition or cosmetic composition containing glucosamine generated from plant materials through a drying process for the maintenance of joint health or prevention, alleviation and/or treatment of osteoarthritis, or the improvement of the skin quality and prevention or restoration of age-related alterations of skin. It also relates to the use of the composition in the manufacture of a nutritional product, a supplement, a treat, a medicament or a cosmetic product and methods for the maintenance of bone health, prevention, alleviation and/or treatment of osteoarthritis, improvement of the skin quality and prevention or restoration of age-related alterations of skin which comprises administering an effective amount of the composition.