Two recent studies concluded that the low-carbohydrate diet can increase life span. However, there is still plenty of controversy surrounding the Keto diet. Share on Pinterest Has the fountain of youth been sitting on your dinner plate? Two new scientific studies independently concluded that a ketogenic diet increased lifespan and preserved memory and motor function in mice. For advocates of the diet, the results are another feather in their cap, but the question remains if the science really outweighs the hype for humans. “The conclusion we draw out of this is that it’s a robust effect,” said Dr. Eric Verdin, president and chief executive officer of the Buck Institute for Research on Aging and senior author of one of the papers, in a press release. “The two studies reinforce each other because they both show the same global effect on healthspan.” Many are taking notice. “This is a really exciting finding and long overdue,” Susan A. Masino, PhD, a professor of applied science at Trinity College in Connecticut, told Healthline. “[Ketogenic diets] mimic the metabolic state of fasting, or caloric restriction — which has many similar benefits.” Masino has spent years researching the ketogenic diet, metabolism, and brain health — that is, how what we eat affects our brains.

How the studies were conducted In Verdin’s study, some mice were fed between 70 percent and 90 percent of their daily food calories from fat. That was compared with control groups receiving only 13 percent to 17 percent from fat, with carbohydrate calories making up the bulk of the difference. The mice on higher fat diets had longer lives, lower midlife mortality rates, and performed better on tests pertaining to certain cognitive functioning. The results “clearly demonstrate that lifespan is increased in mice consuming a ketogenic diet,” compared with a control group, the authors wrote. But, it’s impossible to say that such a conclusion could be reproduced in humans. As such, some experts are more measured in their assessment of these findings. Susan Weiner, MS, RDN, CDE, CDN, a dietitian and diabetes educator, agrees that the results are promising, but she cautions that it is still “too soon to recommend” the diet to many individuals.

Keto diet is controversial The ketogenic diet has become pervasive in the United States in both popular culture and fitness circles for its myriad health benefits, but it remains contentious. The diet is based on the simple premise that when carbohydrate intake is drastically lowered, or stopped entirely, the body must find a new primary source of energy. That source is fat. Ketosis is different from ketoacidosis, which is the leading cause of death of people with diabetes under 24 years of age. Ketosis is identified by the presence of ketones in the bloodstream, a chemical that the body produces when it burns stored fat. The ketogenic diet has proven effective in helping to control seizures in some people with epilepsy. Advocates have also hailed its ability to help shed pounds. These new results, Masino said, are further proof of what some researchers, herself included, have believed for years. However, any time a diet, scientifically backed or not, takes over Americans’ dinner plates, there are bound to be complications. Healthline’s expansive article on the ketogenic diet pointed out a number of problems individuals can have with the diet. These include the risk of muscle loss, fatigue, and, of course, the many health issues associated with yo-yo or fad dieting. Even in that story, many experts were at odds with each other. But Weiner and Masino both agree that for the average American, cutting down on carbs is probably a good thing. “Most adults would benefit from reducing the overall amount of carbohydrate in their diet significantly,” said Masino. “Following a strict ketogenic diet is probably not necessary or realistic for most people unless they have very specific health goals.”