NEW YORK – An apple a day keeps the doctor away, goes the saying, but a new study has found more specifically, that a apple a day could be the key to preventing obesity.
Scientists at Washington State University have concluded that non-digestible compounds in apples – specifically, Granny Smith apples – may help prevent disorders associated with obesity.
The study, published in the journal Food Chemistry, revealed that the non digestible compounds in the fruit, which include fibre and polyphenols, do not get broken down by stomach acid.
When they reach the colon they are fermented by bacteria in the colon which helps friendly bacteria in the gut to grow.
“We know that, in general, apples are a good source of these non-digestible compounds but there are differences in varieties,” said food scientist Giuliana Noratto, the study’s lead researcher. “Results from this study will help consumers to discriminate between apple varieties that can aid in the fight against obesity.”
The tart green Granny Smith apples benefit the growth of friendly bacteria in the colon due to their high content of non-digestible compounds, including dietary fibre and polyphenols, and low content of available carbohydrates.