I use a shake called Pure Nourish, it is only 110 calories, has no chemicals, it combines easily digestable plant based proteins, probiotics, prebiotics and enzymes.
It provides 28% daily fiber and 14 vitamins and minerals. Its gluten free, no GMOs, no artificial flavors or colors no dairy or soy. and it is low glycemic.
You can message me if you are interested in trying it. firstname.lastname@example.org