Thomas DeLauer is a health and fitness expert known for his work in the areas of ketogenic dieting, fasting, and metabolic health. He is a best-selling author, entrepreneur, and YouTube personality with a large following, where he shares evidence-based content on nutrition, exercise, and lifestyle optimization. DeLauer specializes in simplifying complex scientific research into actionable health strategies, often focusing on weight loss, muscle building, and longevity. His own transformation from being overweight to becoming a fitness model has made him a popular figure in the health and wellness space.