A freelance health journalist since 2006, John Parker reports on dietary supplements and wellness research from Tucson, Arizona. He spent five years verifying technical and medical articles for consumer science magazines, evaluating product marketing against published clinical data. Parker relies on that investigative background to assess popular nutrition claims and over-the-counter remedies. His work scrutinizes common claims made about vitamins and herbal formulations. He received a bachelor’s degree in English before entering freelance journalism.