Peanut butter is an excellent source (> 19% of the Daily Value, DV) of protein, dietary fibre, vitamin E, pantothenic acid, niacin and vitamin B6 (t. Also high in content are the dietary minerals manganese, magnesium, phosphorus, zinc and copper. Peanut butter is a good source (10–19% DV) of thiamine, iron and potassium. Both crunchy and smooth peanut butter are sources of saturated (primarily palmitic acid) and unsaturated fats (primarily oleic and linoleic acids).