A dietician is a healthcare professional who specializes in providing advice on food and nutrition to help individuals maintain or improve their overall health. They work with patients to develop personalized meal plans, taking into account factors such as age, gender, weight, medical conditions, and lifestyle choices. Dieticians may also provide counseling and education on topics such as portion control, food allergies, and how to read nutrition labels. Their goal is to help people make informed decisions about their diet in order to lead a healthier life.