Could you explain a little further? What do you mean by allergic to the fruit? Do you have certain fruit allergies or getting a reaction to the fruit?  Changes in your body are going to occur. Know that your body builds up a culture of bacteria designed to digest your current diet. Your taste buds may have been hijacked by high fat, high sugar, high salt, chemically processed foods. It will take 3 days or more to begin the chance in culture. You will find as your body cleanses your taste buds will be significantly different.