Too many antioxidants might not be as safe as people think. New research shows high doses can alter sperm in ways that affect how offspring develop, even changing facial structure. Credit: Shutterstock Antioxidants are often promoted as powerful supplements, credited with helping prevent chronic illnesses and cancer, treating conditions like COPD and dementia, and even slowing the aging process. However, new research from the Texas A&M College of Veterinary Medicine and Biomedical Sciences (