Nutrition is one of the most important factors that affects the quality of life. A balanced diet with adequate nutrients will help maintain healthy weight, general well-being and resistance to disease. A healthy diet includes a variety of fruits and vegetables, grains, fats and protein, and limits the consumption of saturated and trans-fats, sugar, salt and alcohol. A nutritionist can help you to determine the ideal levels of different nutrients for a person's needs and to develop dietary plans to fit into a individual's lifestyle.