“…Among the natural polymers, chitosan and alginate have successfully been used in many fields [ 9 , 10 , 11 , 12 , 13 ]. They have been applied in environmental applications, as a matrix to remove pollutants, and extensively used in medical applications, such as for bioprinting and tissue engineering in regenerative medicine, as well as in drug delivery systems, as carriers for all kinds of drugs (e.g., proteins, antibiotics, vaccines) via different routes of administration, ranging from oral to nasal to cerebral [ 14 , 15 , 16 ]. Additionally, chitosan and alginate derivatives have been tested in order to verify their antioxidant and anti-inflammatory activities [ 17 , 18 , 19 , 20 ]; it has been demonstrated that these polysaccharides possess especially strong antioxidant activity, and their derivatives with polyphenols in particular induce an important antioxidant response.…”