If they are, they need to seriously restrict their carbs.
If you wait until you see raised fasting blood sugar levels, you'll have already killed off more than 70% of your beta cells.
milk thistle and a few other things can help liver and pancreas rebuild. cinnamon and fenugreek can help control blood sugar levels.
http://www.herbs-info.com/herbs-for-pancreas.html
dandelion and a couple others are good for the kidneys too. oregano is great for the immune system.