Grape polyphenols (NuxaFen®) can replace synthetic vitamin E

Dry grape extracts (Vitis Vinifera spp. Vinifera, NuxaFen®, Nuproxa Switzerland) contain high levels of polyphenols, including proanthocyanidins, which confer high antioxidant capacity.

Polyphenols work as:

antioxidants by quenching of free radicals,

chelating metal ions that induce the production of free radicals and

by increasing the activity of antioxidant enzymes like SOD, CAT and GPx.

Previous work has shown that NuxaFen® can partly replace synthetic vitamin E in broiler diets without altering zootechnical performance (Dewez et al., 2022).

OBJECTIVE

Evaluate the capacity of NuxaFen® to partially or totally, replace synthetic vitamin E in broilers fed a diet with high levels of polyunsaturated fatty acids, Fe and metabolizable energy (ME).

MATERIAL AND METHODS

The study was conducted with the research service of ZOOTEST, Ploufragan and within a commercial barn (GAEC de La Ville Gestin, Gestin 22640).

One thousand and twenty (1020) day-old ROSS-308 chicks (100% males) were weighed and

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