Unrefined carbohydrates: carb sources eaten in their natural form or with minimal processing. Refined carbohydrates: processed carbs, typical have a portion of the grain removed. Enrichment: a type of fortification which adds back some, not all, of the nutrients lost in processing. Chemically similar to natural sugars found in fruits, milk etc. But: common sources of rs (cookies, candy, pop) lack same micronutrients and phytochemicals as natural ones. Empty calories energy with few additional nutrients. Sugar units a sugar molecule that cannot be broken down to yield other sugars. Monosaccharides single sugar unit: must be in this form to be absorbed. Glucose monosaccharide that circulates in the blood. Galactose monosaccharide that is part of milk sugar. Fructose monosaccharide found in fruits and vegetables. Glycogen storage form of carbohydrates in animals, made of glucose highly branched together. Starches carbohydrates found in plants, made of glucose in straight or branched chains. Fibre complex carbohydrate that cannot be digested by human digestive enzymes.