Diet means the sum of the food consumed by an organism or group. Dietary habits are the habitual decisions an individual or culture makes when choosing what foods to eat. In our daily we need a food to live but we need advice and help to ensure that we have food, at the right times and in the right amounts.

During the beginning of the New Year, people who have a negative body image usually chosen to seek weight gain, weight loss to improve their personal development. Some of them have chosen diet as their new year's self improvement and body mind spirit in order to improve the looks like or achieve an acceptable quality of life. Dietary habits and choices play a significant role in health and mortality, and can also define cultures and play a role in religion. Dietician has played a good role in consulting peoples and caused people's life taking charge, bringing nutrition and well-balanced meals. A dietician is responsible for compiling menus and orders, plan production and control the quantity of food served to their or public to achieve optimum quality of life.

Chosen a diet means changing a subject's dietary intake. Cooperation or advices from dietician are important for the maximum results. The dietician can monitors the intake of nutritional substances such as proteins, vitamins etc. But, for many reasons, diets are often recommended in conjunction with exercises.