Antioxidants have long been used in food and cosmetics to preserve products, maintain color, enhance taste, and extend shelf life. However, antioxidants intended to exert effects on human cells need to be considered from a different perspective. On the one hand, redox processes are fundamental to life, enabling essential functions such as muscle performance, which rely on oxidative mechanisms. On the other hand, oxidative stress in human tissues is recognized as a contributing factor to aging effects and certain diseases, including some types of cancer. Statements such as "contains antioxidant substances," "has an antioxidant effect," or claims about antioxidant potential expressed as an ORAC value (Oxygen Radical Absorbance Capacity) are increasingly used to market food and cosmetics in regions such as Japan, the USA, and Europe.