By the way, doctor: Can cutting calories help my memory?
Q. I'm 65, and I don't think my memory is as good as it once was. I read about a study that says you can improve your memory by eating less. Is there any truth to it? It sounds too good to be true.
A. It's not as crazy as it might sound.
The study you're referring to was published in the prestigious Proceedings of the National Academy of Sciences (PNAS), and it came after literally thousands of other studies of calorie restriction. In all animals that have been studied, from the simplest creatures to complicated mammals like us, cutting daily calorie consumption by about 30% improves vitality and lengthens life.