Keto diets may reverse polycystic kidney disease - Futurity
KETOSIS TO FIGHT POLYCYSTIC KIDNEY DISEASE
In previous studies, the research team found that reducing food intake in mouse models slowed the growth of polycystic kidneys; but at the time, they did not know why. In the new paper, the scientists identified the specific metabolic process responsible for slowing the progress of the disease.
The best part? It’s a process many of us already know well.
“There’s a way of avoiding the development of the cysts through dietary interventions that lead to ketosis,” Weimbs says.
You read that right: Ketosis, the underlying metabolic state of popular diets such as the ketogenic diet, and, to a lesser extent, time-restricted feeding (a form of intermittent fasting), has been shown in the Weimbs group’s studies to stall and even reverse PKD.
“The cysts appear to be largely glucose-dependent,” Weimbs explains. In people with the predisposition toward PKD, the continuous supply of sugar in the high-carbohydrate, high-sugar diets of modern culture serve to feed the growth and development of the fluid-filled sacs.
“Ketosis is a natural response to fasting,” Weimbs says. “When we fast, our carbohydrate reserves are very quickly used up. In order to not die, our bodies switch over to a different energy source and that comes from our fat reserves.”
The body, he continues, breaks down the fat reserves into fatty acids and ketones which then take the place of glucose in providing energy to the body. The researchers found that the presence of ketones in the blood stream in particular inhibits the growth of the kidney cysts. And with a steady supply, ketones actually acted to reverse the condition in their animal studies.
The problem with typical Western diets is that we almost never go into ketosis: we eat high-carb, high-sugar foods almost continuously throughout the day, securing for ourselves a continuous supply of glucose. In the ketogenic diet, the body’s typical “go-to” source of energy—glucose—is taken away as ketogenic dieters focus on non-carbohydrate foods, eventually forcing their bodies to mimic the fasting response. Time-restricted feeders, meanwhile, reach that state by limiting the window of time they eat to a small part of the day, leaving the remaining 16-20 hours of their day for the body to use up the carbs and sugars and switch over into ketosis.
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