Antioxidants and flavonoids are substances that help the body manage oxidative stress — the load created by free radicals from exercise, environmental factors and normal metabolism among other things. Many occur naturally in berries, vegetables and tea, but supplement form can provide a more concentrated and consistent intake. Astaxanthin, grape seed extract and EGCG are examples of ingredients in this category.











Antioxidants help the body neutralize free radicals — unstable molecules produced by exercise, stress and normal metabolism, among other things, which can otherwise burden cells.
Diet is the foundation, but supplements can provide a more concentrated and consistent dose of specific substances like astaxanthin or EGCG, which are harder to get in large amounts through food alone.
Not necessarily — the body has its own system for oxidative balance, and dosing should follow the product's recommendation rather than the assumption that more is better.