If you are over 35 years of age or are taking any medicines, or have any known diseases including eating disorders, you should not start a diet or exercise routine without first consulting with your physician.  This is important, because dietary change can have powerful effects on your health and may lead to a need for a reduction in your medication dosages. For example, you may be able to reduce or stop medications for cholesterol control, high blood pressure and hypertension. You need to keep your physician informed so that your progress can be followed and if medication changes are necessary, they can be made.