High Fat Diet Makes Mice Live Longer, Like Adding 7 to 10 Years for a Human
“The results surprised me a little,” said nutritionist Jon Ramsey, senior author of the paper that appears in the September issue of Cell Metabolism. “We expected some differences, but I was impressed by the magnitude we observed — a 13 percent increase in median life span for the mice on a high-fat versus high-carb diet. In humans, that would be seven to 10 years. But equally important, those mice retained quality of health in later life.”
Dr. Jon Ramsey with the UC Davis School of Veterinary Medicine holds a mouse. His study found that a high fat diet makes mice live longer.
Ramsey has spent the past 20 years looking at the mechanics that lead to aging, a contributing factor to most major diseases that impact rodents and humans alike. While calorie restriction has been shown in several studies to slow aging in many animals, Ramsey was interested in how a high-fat diet may impact the aging process.
Ketogenic diets have gained popularity for a variety of health benefit claims, but scientists are still teasing out what happens during ketosis, when carbohydrate intake is so low that the body shifts from using glucose as the main fuel source to fat burning and producing ketones for energy.
Diet and aging
The study mice were split into three groups: a regular rodent high-carb diet, a low-carb/high-fat diet, and a ketogenic diet (89-90 percent of total calorie intake). Originally concerned that the high-fat diet would increase weight and decrease life span, the researchers kept the calorie count of each diet the same.
“We designed the diet not to focus on weight loss, but to look at metabolism,” Ramsey said. “What does that do to aging?”
In addition to significantly increasing the median life span of mice in the study, the ketogenic diet increased memory and motor function (strength and coordination), and prevented an increase in age-related markers of inflammation. It had reduced the incidence of tumors, as well.
“In this case, many of the things we’re looking at aren’t much different from humans,” Ramsey said. “At a fundamental level, humans follow similar changes and experience a decrease in overall function of organs during aging. This study indicates that a ketogenic diet can have a major impact on life and health span without major weight loss or restriction of intake. It also opens a new avenue for possible dietary interventions that have an impact on aging.”
Researchers do not know at this time if there is an optimum fat for a ketogenic diet.
A companion study published by the Buck Institute for Research on Aging in the same issue of Cell Metabolism shows that a ketogenic diet extends longevity and improves memory in aging mice.
Funding for this study was provided by the National Institutes of Health and the UC Davis Mouse Metabolic Phenotyping Center.
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by Trina Wood
University of California – Davis
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Whistler Blowers, Insiders
Yeah that’s because your body brakes down carbs and sugar first, so I’d you’re eating more carbs and sugar than fat, you’re body never gets a chance to break down any fat.
Want to lose weight? Less carbs more fat, you’ll see results faster than starving yourself.
if they used EV olive oil or coconut oil, i could see the mice living longer; with soy, corn, etc, forget it