Slim Fast isn't dangerous; it just isn't a great option for most people as it can leave you hungry. But when you aren't hungry and just trying to add some calories and protein it's fine. There is some pricey boutique stuff that's fruity and has protein. I like Muscle Milk; you can often catch it on sale. Depending on how much trouble you want to go to, smoothies are good. We have a Magic Bullet, so whipping up a yogurt, fruit and milk smoothie is pretty quick. But there is nothing wrong with chocolate milk or regular milk. I would get with my doc and see if I couldn't figure out what's up; you should still be able to eat when you are under 1200.