Nutrition Degree

Hi, I took recently with a bachelor's degree in nursing, but have found that dietary products / nutrition is the area I would love to work in. Does anyone know if my education would be sufficient to meet the entry requirements of nutrition studies at the university. The only other qualifications, I have a HNC in health care. Some have told me that a certain degree of any kind is sufficient, while others have said I would further Higher / A-level is needed, etc.Any advice would be greatly appreciated.