A claim you hear on longevity podcasts
The claim checked: Mixing banana into a blueberry smoothie has been shown to decrease its polyphenols Hear it at 3:24:16
No study we found tests this point yet.
The study behind the claim tested something else. See what it tested
“Don't mix the blueberry with the banana smoothie because it it has been shown to decrease the the polyphenols which are important.”
She names no study on tape. This is the one human trial that matches her description. Impact of polyphenol oxidase on the bioavailability of flavan-3-ols in fruit smoothies: a controlled, single blinded, cross-over study. Food Funct, 2023. Controlled, single-blinded crossover trial, 8 healthy men.
What it found
“In contrast, the intake of the high PPO drink resulted in a Cmax of 96 ± 47 nmol L-1, 84% lower than that obtained after capsule intake.”
How the authors extend it
“In conclusion, bioavailability of flavan-3-ols, and most likely other dietary polyphenol bioactives, can be reduced substantially by the co-ingestion of high PPO-containing products, the implications of which are of importance for dietary advice and food preparation both at home and in industrial settings.”
Funded by Mars, Inc., which supplied the cocoa extract; 3 of the authors work for Mars. Two readers agreed on the label, and the paper was read in full.
No study we found tests this point. These were read, and each tests a different question:
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