Get a hair analysis. Vitamin and mineral levels inside your body register in the hair. Toxins also show up in the hair. I recommend everyone have at least one hair analysis in their lifetime. It reveals what vitamins and minerals you need, and possibly what toxins have accumulated within the tissues.
Toxins stimulate allergies and can cause disease.
If there's only time to grab quick food, keep lots of fresh vegetables, natural, dry cheeses, whole-grain crackers, pickles, natural yogurts, Tofu, fruits and nuts, water and fresh juice on hand. You may have to shop more often because the 'real stuff' spoils more quickly, but that's because it's loaded with enzymes and live nutrients - nutrients that do something for your health. A nutritious quick meal. Plus, eat all you want. It's hard to gain weight eating only natural foods.