The total process to gain the credentials to become a dietitian takes up to five years. The U.S. Bureau of Labor Statistics indicates that most states have licensing requirements for dietitians that include completing a bachelor's degree in dietetics, food and nutrition, or a related field.
The BLS notes that most state licenses also require several hundred hours of supervised training. This may take an additional year of internship training following a four-year degree. Some aspiring dietitians may reduce the time by completing their internship experience while finishing their degree program. Dietitians may earn an advanced degree for more income or promotions.