An apple a day doesn't just keep the doctor away-it may also help you stay slim. Granny Smith apples in particular fight obesity and some of its worst effects, say researchers.
The apples counteract problems associated with obesity, such as low-grade and chronic inflammation that can lead to diabetes. They also interfere with metabolic processes that are associated with obesity, and they make you feel satisfied and full.
All apples have non-digestible compounds-such as dietary fibre and polyphenols-that encourage the growth of 'friendly' bacteria in the colon.
But the very best apples for amounts of non-digestible compounds are the tart green Granny Smiths. They contain more than the Braeburn, Fuji, Gala, Golden Delicious, McIntosh and Red Delicious varieties, say researchers from Washington State University.
(Source: Food Chemistry, 2014; 161: 208)