Hi Mary:
I am unfamiliar with celiac sprue but I fix milkshakes for my husband. Low appetite is very common and he has difficulty with appetite. He won't drink ensure or boost so my milkshakes are made from carnation instant breakfast, vanilla ice cream, half & half cream, yogurt and whey protein powder if his protein intake has been low. You can also add fresh fruit, bananas, peaches, strawberries etc. I figure each shake is about 600 calories & the onc has told him to drink 2 each day. Please re-visit the marinol issue with your onc, it's the active ingredient in marijuana, or of course you could always take that matter into your own hands and handle it yourself. Good Luck & God Bless
wendyr