Packed with healthy ingredients, protein smoothies, especially for pancreatic cancer patients, can be a great way to get calories, as well as much-needed nutrition. ... "Protein shakes that are homemade or commercially available can be a good way to provide needed calories, protein and fluid."Sometimes it is best to rest the pancreas and limit your food intake. If you are experiencing a flare, your doctor may even recommend no food for a day or two. A diet of clear liquids can be followed when pain is severe. Clear liquids include apple, cranberry and white grape juice, gelatin and broth.