This study evaluated the productive performance, blood parameters and antioxidant status of hyperprolific sows fed control diet or supplemented with brown seaweed polyphenol mixture (SPM). Ninety-six farrowing highly prolific (Topigs 20) were assigned to two dietary treatments from day 107 ± 2 days gestation until weaning: same containing 15 g/day SPM. Sows SPM tended have lower backfat losses ...