Blood Type Diet Health Assistant is a health management application based on blood type diet theory, which helps users choose suitable foods and develop healthy diet plans according to their blood type. It provides personalized food recommendations and blood type diet guidance for four blood types: A, B, AB, and O, and displays detailed food classifications (grains, vegetables, fruits, meat, seafood, etc.), including nutritional information, fat content, and calorie data. Through the health calculator, BMI index, standard weight, and personalized health advice are calculated, providing users with intuitive data display and health status assessment. This application is designed to help users better understand and practice blood type diet and improve health in a scientific way.