I've experienced the opposite before.. after having a smoothie with probably 5 bananas in it, I was hungry a couple of hours afterwards. Probably due to the sugar content.

I don't think this makes banana smoothies healthy either. Just things like congee, or like... blending steak and veggies into a drinking cup, or something.

Bananas and smoothied are very good for you. But it partly depends what you're doing. They're great for inclusion liver glucose levels to fuel a workout

As far as fruit goes bananas are the least healthy. They don't have a lot in the way of vitamins, and some people have a larger insulin response to bananas than cookies.

Although not really a smoothie, I find that I can easily eat twice as many potatoes if they're mashed than if they're simply boiled. So I'm not entirely convinced.

I can't remember one time in my life that I've slammed down the smoothie glass and gone "boy am I satiated and satisfied!"

YMMV.