This study assessed the antioxidant, antimicrobial, anticancer and neuroprotective activities of the kappa(k)-carrageenan isolated from the red alga Hypnea musciformis (Hm-SP). The chemical spectrum of the k-carrageenan fromHm-SPwas confirmed by Fourier transform infrared (FT-IR) spectroscopy.Hm-SP revealed an antibacterial and antifungal action against Staphylococcus aureus and Candida albicans, respectively. ...