Here is a short list of Ingredients and Phrases to Avoid:

Artificial Colors
Artificial Flavorings
Artificial Sweeteners (Acesulfame-K, Aspartame, Equal®, NutraSweet®,  Saccharin, Sweet’n Low®, Sucralose, Splenda® & Sorbitol)
Benzoate Preservatives
(BHT, BHA, TBHQ)
Brominated Vegetable Oil(BVO)
High Fructose Corn Syrup (HFCS)
MSG (Monosodium Glutamate)
Partially Hydrogenated Oil
Propyl Galate
Sodium Nitrate or Sodium Nitrite
Sugar
Enriched or bleached flour