Granny Smith apples ranked higher in beneficial non-digestible compounds than some other varieties.
Granny Smith apples ranked higher in beneficial non-digestible compounds than some other varieties.

An apple a day could keep obesity away, thanks to non-digestible compounds in the fruit.

A study recently published in the Journal Food Chemistry and conducted by Washington State University researchers looked at compounds that survive chewing and stomach enzymes.

When the compounds reach the intestine, they are fermented in the colon, spurring the growth of beneficial bacteria, according to a news release.

The study found that Granny Smith surpass Braeburn, Fuji, gala, golden delicious, McIntosh and red delicious in the amount of non-digestible compounds they contain.

The compounds in Granny Smith. in particular helped change the proportions of fecal bacteria in obese mice to be similar to those of lean mice.

The findings could help prevent some disorders tied to obesity, such as low-grade, chronic inflammation that can lead to diabetes.

The balance of bacterial communities in the guts of obese people is disturbed, leading to inflammation and metabolic disorders associated with obesity.

Re-establishing a healthy bacterial balance in the colon stabilizes metabolic processes that can influence inflammation and the sensation of feeling full.