The Smoothie Ingredient That Might Be Blocking Your Health Boost

We all love a good smoothie. It’s portable, refreshing, and feels like a wellness win. But according to new research from UC Davis, one common smoothie ingredient might be sabotaging the very nutrients you’re trying to get.

The Hidden Conflict in Your Smoothie

A small study looked at how our bodies absorb flavanols, the antioxidant compounds found in berries and cocoa that support heart and brain health. When participants drank berry smoothies with a certain popular fruit added in, their flavanol absorption dropped—by as much as 84%.

The Culprit? An Enzyme Called PPO

The issue isn’t the fruit itself—it’s the enzyme polyphenol oxidase (PPO) it naturally contains. PPO breaks down flavanols before your body has a chance to use them. And yes, the fruit in question is… banana. Even just one was enough to make a measurable difference in flavanol levels.

Should You Ditch Bananas?

Not necessarily. Bananas are still a great source of fiber, potassium, and B vitamins. But if you’re drinking smoothies specifically to boost flavanol intake—think for cognition, blood flow, or inflammation support—it may be smart to leave bananas out of your berry blends.

You can still:

• Add banana to non-berry smoothies

• Blend it separately

• Use other creamy, low-PPO fruits like mango or avocado

Small Change, Big Impact

This doesn’t mean bananas are bad. It just shows how little tweaks can help you get more from the food you’re already eating.

Curious about how food affects your health? Read more next:

• The Best 8 Foods to Lower Blood Sugar Levels

• Foods To Eat For High Cholesterol 

• The Best 7 Foods For Brain Health, Say Dietitians

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