Filter by category: Brain HealthCancerDigestive HealthHeart HealthOtherWeight Loss JavaScript is currently disabled.Please enable it for a better experience of Jumi. An apple a day keeps the calories at bay October 24, 2007 USA Today, 2007; study published in Appetite, 2009 Renowned weight loss expert Barbara Rolls, Ph.D. and her team found that eating an apple 15 minutes before meal time.