I make my own at home with fruits and veggies and I have to add carnation instant breakfast mix
I would look at ingredients. Some of the energy ones have lots of caffeine, some of the slim downs have a mix that is smoothie kings own blend that who knows what's in it. Fake sugars? Caffeine or other energy drink type ingredients?
I found out that if you go in there they have a list for you about which smoothies were approved for pregnancy!