I need your expertise, is a homemade banana smoothie a good breakfast?

Yes: This can be part of a healthy and balanced diet.

Eat breakfast.: Breakfast is an important meal, and should not be replaced by a smoothie or other meal replacement. If you're strapped for time, you can do it on rare occasion, but not as a typical breakfast. Eat healthy solid breakfast foods.

Depends what's in it: Studies show that a good breakfast is necessary for cognition, learning, weight loss, insulin sensitivity. Bananas are a good starting ingredient for a smoothie if you want one. Men's Health asked a top nutritionist what he eats for breakfast and he has a banana smoothie with coffee and protein powder, cocoa, and walnuts. See the link below.