A banana isn't just a convenient snack, it's also a source of protein. How much protein is in a banana depends on its size, so if you're tracking nutrition information for your diet, pay attention to the size of the banana you're eating. The protein content can vary from less than one gram to almost two grams. Discover the health benefits of bananas, from aiding post-workout recovery to supporting heart health and easing digestive issues. Learn why this nutrient-rich fruit should be part of your diet. Loved by some and loathed by others, bananas are one of those foods that split opinion. Here's an objective look at their nutritional value. Given how much protein in 1 banana is just 1.3g, you would need to consume about 15 bananas to match the protein in one serving of a plant protein powder — clearly impractical and unbalanced.