Definition of FREE RADICAL

Examples of free radical in a Sentence

Recent Examples on the Web The antioxidant, made of amino acids, hydrates and shields skin from free radicals. — Sarah Kinonen, Allure, "Perricone MD Launches Essential Fx Skin-Care Line With Vitamin F," 9 Aug. 2018 Antioxidants: These compounds can prevent or reduce the effect of free radical damage. — Nia Decaille, Washington Post, "A guide to the confusing and sometimes controversial ingredients in your cosmetics," 7 Feb. 2020 HydroPeptide Antioxidants and vitamin C in Firma-Bright 20% Vitamin C Booster combat skin-damaging free radicals while reducing skin discoloration. — Meg Hemphill, The Hollywood Reporter, "5 Skincare Must-Haves From Brands Used by Meghan Markle and Angelina Jolie," 18 Jan. 2020 The honey adds a boost of antioxidants to the gentle formula, which lessens free radical damage on the skin, while the pumpkin gives natural moisturization benefits. — Braelyn Wood, Health.com, "Ali Wong Loves This Andalou Naturals Mask for Baby-Soft Skin," 10 Dec. 2019 Spinach is rich in lutein, potassium, fiber and brain-boosting folate, and just one cup of raw leaves contains 15% of your daily intake of vitamin E, an important antioxidant for fighting off the damaging molecules known as free radicals. — Sandee Lamotte, CNN, "Top 34 bestselling 'fruit' drinks for kids deemed unhealthy," 16 Oct. 2019 The Dsup protein protects DNA under conditions that create caustic free radical chemicals. — Susanne Bard, Scientific American, "Tardigrade Protein Protects DNA from Chemical Attack," 16 Oct. 2019 The reactions a cell uses to produce energy also generate side products called free radicals, which can trigger Maillard-like reactions and produce polymers similar to those in the fossil protein residues. — Gretchen Vogel, Science | AAAS, "Warm-blooded velociraptors? Fossilized proteins unravel dinosaur mysteries," 8 Oct. 2019 In a nutshell, oxidative stress occurs when there is an imbalance between the production of cell-damaging free radicals and the body's ability to counter their harmful effects, which include premature aging and disease risk. — Cynthia Sass, Mph, Health.com, "Cauliflower Benefits: 7 Ways This Vegetable Helps Your Health," 23 Oct. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'free radical.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.