@nana120 - I use protein powder, that I mix with yogurt and frozen fruits to boost my protein intake.

I use Orgain Nutrition vegan protein shakes...plant based, gluten free, free of dairy and they also have lots of fruits and vegetable powders in them. They also have non-vegan. You can get them on Amazon...I love them!

I realize this is an older post, but wanted to comment for future readers that dairy has not given me any problems. In fact I try to drink a glass of low fat milk most days. My breakfast most days is plain fat free Greek yogurt and 1/3 C blueberries. I also almost always have some kind of cheese with lunch.
In general too much fat will cause diarrhea for me and high carb or sugary foods will trigger flushing and blood pressure drops which has led to fainting twice, (plus nearly fainting a half dozen times).
(I know not everyone with NETs has carcinoid syndrome but I'm one of the lucky zebras. Lol.)
Blessings to each one of you!