An example: lemons are obviously acidic, but after digestion they are actually alkalizing to the body. If you have acid reflux or GERD you should avoid certain fruits and vegetables that may be listed as alkaline, as they may be acidic outside the body or before digestion. Here's a cheat sheet of yummy alky food and drinkhave your fill! Packaged foods are often full of hidden offenders and microwaved meals are full of sugars and salts. Mildly Alkaline.