
Bananas in Smoothies Could Undercut Berry Flavanols, Study Shows
UC Davis researchers found that adding bananas to berry smoothies dramatically reduces flavanol absorption due to the PPO enzyme—banana smoothies showed about 84% lower flavanol levels than a control; pairing flavanol-rich ingredients with low-PPO foods (e.g., mango, pineapple, orange, yogurt) may preserve flavanols.













