There are many antioxidant nutrients: 1. Carotenoids are rich in essential antioxidants and can synthesize vitamin A. 4, and soy isoflavones are antioxidants. 5, some plant protein substances also contain antioxidant ingredients, such as dried tofu, water tofu, soy products, dried tofu, which is rich in soy beans, therefore, also contains antioxidant ingredients. 6, in some grape seeds, blueberry skin is also rich in a variety of antioxidant nutrients.