Noel from my 6am class recently passed on the following article.
An exert is below but the full article is worth the read.
A number of studies have been published – primarily on rodents – showing that intermittent fasting led to a host of benefits that not even caloric restriction could claim. And these weren’t studies published by no-name scientists laboring in backwater research departments. People were starting to take notice.
As we saw in the Keys semi-starvation study, caloric restriction isn’t much fun for humans, and it apparently isn’t all that much fun for the animals undergoing it either. When rats live out their ratty lives calorically restricted in their cages, they seem to show signs of depression and irritability. Primates do as well. If primates don’t get enough cholesterol, they can actually become violent. But they do live longer. Even though CR has never been proven in humans, based on lab animal experience it does work. So, if you’re willing to put up with irritability, hostility and depression, it might be worth cutting your calories by 30 percent for the rest of your long, healthy miserable life.
But could there be a better way?
An enterprising scientist decided to try a little twist on the CR experiment. He divided the genetically-similar animals into two groups, fed one group all it wanted and measured the intake, then fed the other group all it wanted – except every other day instead of daily. When the intake of the group fed every other day was measured, it turned out that that group – the intermittently fasted group – ate just about double on the eat days, so that overall both groups consumed the same amount of food. Animals in the one group at X amount of food per day while the animals in the other group ate 2X amount of food every other day. So both groups ate the same number of calories but the commonality ended there.
The intermittently fasted group of animals despite consuming the same number of calories as the ad libitum fed group enjoyed all the health and longevity benefits of calorically restricted animals. In essence, they got their cake and ate it, too. They got all the benefits of CR plus some without the CR.
Intermittent fasting (IF) reduced oxidative stress, made the animals more resistant to acute stress in general, reduced blood pressure, reduced blood sugar, improved insulin sensitivity, reduced the incidence of cancer, diabetes, and heart disease, and improved cognitive ability. But IF did even more. Animals that were intermittently fasted greatly increased the amount of brain-derived neurotrophic factor (BDNF) relative to CR animals. CR animals don’t produce much more BDNF than do ad libitum fed animals.
Part 2 of the article was just posted as well but I havent had a chance to go through it yet.