Does you husband have high stomach acid? or just acid in his body in general?
Foods that increase acid are sugars (including white flour products), fats and oils, and meats.
-caffeine containing products, carbonated beverages, creamy cheeses, desserts, fats, fried foods, gravies, rich sauces, raw onions, peppermint, chicken skin, processed foods, spearmint, spicy or highly seasoned foods, sugar, tobacco or tomatoes. The foods mentioned here worsens reflux or heartburn
most of your fruits and vegetables increase alkalinity in the body