Terry is happy to provide his opinion on diet and nutrition, supplements and lifestyle choices. This information is for educational purposes only. It is not meant to replace the advice of your physician and is not to be considered medical advice, diagnosis or treatment. Should you have any concerns please contact your physician directly.Q. Dear Terry, “I am interested in your diet but I am allergic to grapefruit, lemons, and limes. What can I substitute for the grapefruit and such? Thank you.” —Marla L., Billings, MT A. Dear Marla, My diet offers suggestions for types of foods to include, but these are not mandates. There is no need for you to eat the foods to which you are allergic. Just avoid them, and eat any other fruits that you are able to handle without complications. How about bananas, blueberries, apples, and grapes? There are plenty of healthy alternatives. For more information, see My Diet for All Mankind.