I work as a nutritionist for a long term care chain, and have been weighing the nutritional pros and cons of "nutrition in a can" for the last 10 years. If you are a diabetic, as I am, you should approach any long term use of these items, including Glucerna, with a skeptic's eye. While labelled as nutritionally complete, well, it's not going to replace meat & veggies for your body any time soon. The micronutrients just don't match up. If you are looking to safely gain some weight, I strongly recommend trying the sugar free Instant Breakfast first. It's much more economical, contains fresh milk once it's mixed, and doesn't tend to either kill your appetite or slow things down in the GI tract to cause constipation as the canned items will do if used often. If you are lactose intolerant, the Soy Milk mixes with it just fine and tastes just as good. If you REALLY need to pack on the pounds, you can even mix it with 50/50 milk and whipping cream or half'n'half for a calorie boost.