Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Antioxidants are substances that help protect cells from damage caused by harmful molecules called free radicals. They neutralize these free radicals and prevent them from causing oxidative stress, which can lead to various health problems.
Related terms
Free Radicals: Unstable molecules that have an unpaired electron. They can damage cells and contribute to aging and diseases such as cancer.
Oxidative Stress: An imbalance between the production of free radicals and the body's ability to counteract their harmful effects. It can lead to cellular damage and is associated with various health conditions.
Superfoods: Nutrient-dense foods that are rich in antioxidants, vitamins, minerals, or other beneficial compounds. Examples include berries, leafy greens, nuts, and seeds.