All natural, no preservatives. Separation may occur. In my kitchen I have what I call my own dynamic duo - mushrooms and onions. When I add'em to lots of plump tomatoes, garlic, my own blend of Italian spices and cook'em all together, I say, Oh yeah, bebe. Try my Mushroom Onion Sauce on your favorite pasta, maybe over some chicken or veal. I promise, it'll make you happy, happy, happy.