Joints are part of “beauty,” too—because comfort changes posture, movement, and even willingness to groom. A cat that moves easily tends to look more self-possessed: higher tail carriage, cleaner landings, and more playful confidence. Research in cats with osteoarthritis has evaluated diets including hydrolysed collagen in controlled trial designs, alongside other supportive ingredients (Lefort-Holguin, 2024).
That evidence doesn’t mean a collagen supplement replaces veterinary care, weight management, or pain control. It does support why some owners include collagen peptides as part of a broader comfort-and-presentation plan. If your cat is aging, less willing to jump, or looks “tight” after naps, talk with your veterinarian. Then, if appropriate, choose a marine collagen peptides supplement for cats that’s simple enough to use consistently.