Chondroitin, a metabolic intermediate of chondroitin sulphate biosynthesis in mammals and other living organisms, possesses biological properties different from those of chondroitin sulphate, and can be advantageously used for applications in the pharmaceutical, nutraceutical, cosmeceutical and medical device fields. Chondroitin has biostimulating, anti-inflammatory and anti-microbial activity and can be used in the treatment of osteoarthritis, eye disorders, interstitial cystitis, lung disorders, inflammatory disorders in general, oncological disorders, peritoneal dialysis, tissue biorevitalisation and wound repair, as a skin filler, and as bioresorbable scaffolds.