AM Nutrition Services is a nutrition counseling practice founded in 2007 by Registered Dietitian Amy McCallister. The organization provides individualized, evidence-based nutrition care grounded in medical and physiological realities rather than fad dieting or weight-focused trends. Its approach emphasizes practical, long-term support, helping people build sustainable habits, tools, and skills that strengthen nutritional health over time. Serving communities across the Greater Phoenix region and Greater Las Vegas, including Henderson, the practice maintains a personalized, clinically grounded style centered on realistic, measurable health improvement.