antioxidant
US /ˌæn.t̬iˈɑːk.sɪ.dənt/
UK /ˌæn.t̬iˈɑːk.sɪ.dənt/

1.
a substance that inhibits oxidation, especially one used to counteract the deterioration of stored food products or remove potentially damaging oxidizing agents in a living organism.
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Vitamins C and E are well-known antioxidants.
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Eating berries provides your body with natural antioxidants.
1.
inhibiting oxidation
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The cream contains antioxidant properties to protect the skin.
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Green tea is known for its strong antioxidant effects.