Here is an interesting blog I found that just lists foods by grocery chain, brand and food groups. It gives serving size, and nutritional content. This is not an endorsement for any brands or grocery chains, but I thought it was just a nice simple blog for a quickie look-up of many food items if you are interested in nutritional content.
This link will take to the pinto bean listing, but on the right side of the page you will see a variety of other food group selections to choose from. Click on link below to check it out.
Healthy Grocery: Pinto Beans - Safeway Kitchens: Pinto beans from Safeway Kitchens. 3.5 Servings. Per Serving. Fat 0g. Fiber 9g. Sugars 2g. Protein 7g.