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Research has demonstrated that bananas contain an enzyme called polyphenol oxidase that significantly reduces the bioavailability of flavanols when combined with flavanol-rich berries in smoothies. The enzyme breaks down or interferes with the absorption of these beneficial plant compounds, which are known for their cardiovascular and cognitive health benefits. This finding highlights how food pairings can unexpectedly alter the nutritional value that the body receives from otherwise healthy ingredients.
Why it matters
This discovery has practical implications for how people prepare nutritious beverages and meals, suggesting that ingredient combinations matter as much as individual food choices. Understanding these interactions could help optimize dietary strategies to maximize the absorption of beneficial nutrients like flavanols, which are associated with improved heart health and reduced inflammation.
Researchers found that adding bananas to berry smoothies can dramatically reduce the body’s ability to absorb healthy flavanols. The surprising discovery shows that even simple food combinations can change how much nutrition your body actually gets.
Source: Surprising research reveals why you shouldn't add bananas to your smoothies