‘Dark Oxidants’ Form Away from Sunlight in Lake and Ocean Depths, Underground Soils

Breathing oxygen... can be hazardous to your health? Indeed, our bodies aren't perfect. They make mistakes, among them producing toxic chemicals, called oxidants, in cells. We fight these oxidants naturally, and by eating foods rich in antioxidants such as blueberries and dark chocolate. All forms of life that breathe oxygen—even ones that can't be seen with the naked eye, such as bacteria—must fight oxidants to live.