I did answer this in a similar thread, but in case you don't see it;
Try acidic fruits like lemons and watermellons, some grapefruit, oranges, and similar. They will cause your body to change its digestive fluids to a more alkaline 'recipe'.
You should take care when combining foods. Your body will have trouble digesting (for example) a meat dish, followed by a fruit salad desert. The substances that digest those foods are different and your stomach will have to try to take in one before switching over and tackling the other.
Not only will your body have to work harder, but you end up with stomach and digestive problems. Foods fermenting and curdling in your stomach are also problems..
Just pay some attention to what you're eating and if you want fruit after you meat, give it some time before moving through your courses.