Yes, baked potatoes! They contain 75% of your daily copper need, this essential mineral works with vitamin C (also contained in a potato) and zinc to produce the elastin fibers that support skin structure.
Potatoes are a complex carb loaded with fiber, which means they break down slower and make you feel fuller longer. Long snubbed by the GI, research has shown that the GI label is incorrect. Preparation can change the GI level, such as baking. Just be aware of what you put on it!
Tip: Try replacing sour cream with greek yogurt.