A dietician is a health professional with specialized knowledge in nutrition and dietetics. They provide expert advice to individuals and groups on how to improve their health and well-being through food and dietary choices. Dietitians use their knowledge to develop and implement individualized nutrition plans, considering factors like age, medical conditions, and lifestyle. They also educate people about healthy eating habits and the role of nutrition in preventing and managing diseases. Ultimately, a dietician aims to help individuals achieve optimal health through a balanced and sustainable diet.