Claim: Bananas in smoothies reduce flavanol absorption

The claim that bananas in smoothies reduce flavanol absorption is true. Research from UC Davis and peer-reviewed studies consistently show that banana-based smoothies lead to significantly lower levels of flavanols in the body compared to other smoothie options. This effect is attributed to the presence of polyphenol oxidase in bananas, which interferes with flavanol bioavailability. While some sources acknowledge that the timing of consumption may influence the extent of this reduction, they do not dispute the core finding that bananas negatively impact flavanol absorption in smoothies. Thus, the consensus supports the claim strongly. All three graders point in the same direction, with minor differences. Gemini comes in highest (95%), while OpenAI is lowest (85%). While the evidence strongly supports the claim, one source suggests that the reduction in flavanol absorption may vary based on timing and contact time in the smoothie. It indicates that immediate consumption might lessen the effect, but this does not fundamentally contradict the main findings. The nuance regarding timing does not change the overall conclusion that bananas significantly reduce flavanol absorption compared to other fruits. Therefore, while there is some uncertainty about the degree of impact based on consumption timing, the primary assertion remains valid based on the majority of evidence presented.