Medical nutrition therapy (MNT) is a therapeutic approach to treating medical conditions and their associated symptoms via the use of a specifically tailored diet devised and monitored by a registered dietician. The diet is based upon the patient's medical and psychosocial history, physical examination and dietary history.

The role of MNT is to reduce the risk of developing complications in pre-existing conditions such as diabetes as well as ameliorate the effects any existing conditions such as high cholestorol.