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Don't Add Bananas to Your Smoothies for Maximum Nutrients

Published on June 21, 2026, 12:41 p.m.
Don't Add Bananas to Your Smoothies for Maximum Nutrients

Topic: Health

Researchers found that bananas can reduce the amount of healthy compounds in smoothies. This is because bananas contain an enzyme called polyphenol oxidase, which interacts with other ingredients.

Smoothies are a great way to get more fruits and veggies into your diet. But did you know that adding bananas to your smoothie might not be the best idea? A recent study from the University of California, Davis found that bananas can actually reduce the amount of healthy compounds in your smoothie. This is because bananas contain an enzyme called polyphenol oxidase (PPO), which interacts with other ingredients in a way that affects how well our bodies absorb these nutrients.

The researchers tested this by having participants drink three different smoothies: one made with bananas, another made with mixed berries, and a third made with a flavanol supplement. They found that the banana smoothie resulted in an 84% lower level of flavanols being absorbed into the body compared to the other two options.

This doesn't mean you should never eat bananas again! Bananas are still a great source of fiber, potassium, and other nutrients. The key takeaway is that if you're trying to get the most out of your smoothie in terms of healthy compounds, it might be better to choose ingredients with low PPO activity.

So what can you do instead? Try pairing flavanol-rich fruits like berries with ingredients that have low PPO activity, such as pineapple, oranges, or mango. You can still enjoy bananas on their own or use them in smoothies where flavanol intake isn't the main goal.

The study's lead author, Javier Ottaviani, recommends being mindful of how different foods interact and preparing your smoothie ingredients accordingly.

This research has practical implications for people looking to boost their nutrient intake through smoothies. By choosing the right ingredients and understanding how they work together, you can make informed decisions about what goes into your blender.

Why It Matters

As Indian students, it's essential to understand how our food choices affect our health. This study highlights the importance of considering how different foods interact when trying to maximize nutrient intake. By making informed choices, we can create healthy habits that benefit us in the long run.

Key Facts

  • Bananas contain an enzyme called polyphenol oxidase (PPO) that interacts with other ingredients in smoothies.
  • The PPO in bananas can reduce the amount of flavanols being absorbed into the body by up to 84%.
  • Flavanols are natural compounds found in fruits like berries, apples, and pears that have been linked to heart and cognitive health.
  • Choosing ingredients with low PPO activity, such as pineapple or oranges, can help maximize nutrient intake from smoothies.
  • Bananas are still a great source of fiber, potassium, and other nutrients, but may not be the best choice when trying to boost flavanol intake.

Key Terms

Polyphenol oxidase (PPO)
An enzyme found in fruits that helps trigger browning reactions.

Implications

As Indian students, it's essential to understand how our food choices affect our health. This study highlights the importance of considering how different foods interact when trying to maximize nutrient intake. By making informed choices, we can create healthy habits that benefit us in the long run.


Source: https://www.sciencedaily.com/releases/2026/05/260524020950.htm

Journal Reference:

  1. Javier I. Ottaviani, Jodi L. Ensunsa, Reedmond Y. Fong, Jennifer Kimball, Valentina Medici, Gunter G. C. Kuhnle, Alan Crozier, Hagen Schroeter, Catherine Kwik-Uribe. Impact of polyphenol oxidase on the bioavailability of flavan-3-ols in fruit smoothies: a controlled, single blinded, cross-over study. Food, 2023; 14 (18): 8217 DOI: 10.1039/D3FO01599H

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