Question: how many grams in a serving of whole grains?
Answer: A serving is considered 16 grams of whole grain (ingredient) in a whole grain product. Some exact serving sizes of whole grain foods are: 1/2 cup cooked brown rice, 100% whole grain pasta, oatmeal, or other cooked grain; 1 slice 100% whole grain bread; or 1 ounce of 100% whole grain cereal.