Friday, March 29, 2013

Ketogenic Diet Reverses Kidney Disease (Nephropathy) - YouTube

Lol, this is rich. "Ketogenic Diet Reverses Kidney Disease (Nephropathy)"

OMG! This is incredible! Kidney failure is irreversible! But eating this strange high fat diet COMPLETELY CURED IT within 2 months for mice! Let's start testing the diet on people whose total lack of kidney function is a death sentence, right?

Wrong- quote "a high fat diet could have other problems. We don't want to actually put people on the diet, we want to figure out how the diet works and make a drug that does the same thing", Lol. Yeah,  not like kids with epilepsy have been on ketogenic diets for years since the 1950's with no ill effects. Maybe someday someone will find evidence dietary fat causes heart disease, ha ha


Ketogenic Diet Reverses Kidney Disease (Nephropathy) - YouTube: Ketogenic Diet Reverses Kidney Disease (Nephropathy)

Charles Mobbs, a scientist at Mount Sinai School of Medicine in New York, discovers how a low carb, ketogenic diet reverses kidney failure in diabetic mice.

Wednesday, March 27, 2013

After weight-loss surgery, new gut bacteria keep obesity away | Reuters

After weight-loss surgery, new gut bacteria keep obesity away | Reuters

The logic behind weight-loss surgery seems simple: rearrange the digestive tract so the stomach can hold less food and the food bypasses part of the small intestine, allowing fewer of a meal's calories to be absorbed. Bye-bye, obesity.

A study of lab mice, published on Wednesday, begs to differ. It concludes that one of the most common and effective forms of bariatric surgery, called Roux-en-Y gastric bypass, melts away pounds not - or not only - by re-routing the digestive tract, as long thought, but by changing the bacteria in the gut.

Or, in non-scientific terms, the surgery somehow replaces fattening microbes with slimming ones.

If that occurs in people, too, then the same bacteria-changing legerdemain achieved by gastric bypass might be accomplished without putting obese patients under the knife in an expensive and risky operation.

[...]

For many obese patients, particularly those with type 2 diabetes, gastric bypass has succeeded where nothing else has. Severely obese patients routinely lose 65 to 75 percent of their excess weight and fat after the operation, studies show, and leave their diabetes behind.

Oddly, however, the diabetes remission often occurs before significant weight loss. That has made bypass surgeons and weight-loss experts suspect that Roux-en-Y changes not only anatomy but also metabolism or the endocrine system. In other words, the surgery does something besides re-plumb the gut.

That "something," according to previous studies, includes altering the mix of trillions of microbes in the digestive tract. Not only are the "gut microbiota" different in lean people and obese people, but the mix of microbes changes after an obese patient undergoes gastric bypass and becomes more like the microbiota in lean people.
[...]

Another new study found that figuring out whether you have slimming microbiota or fattening ones might be as easy as breathing.

In a study published on Tuesday in the online edition of the Journal of Clinical Endocrinology & Metabolism, researchers at Cedars-Sinai Medical Center in Los Angeles report that people whose breath has high concentrations of both hydrogen and methane gases are more likely to have a higher body mass index and higher percentage of body fat.

Methane is associated with bacteria called Methanobrevibacter smithii, which in overabundance may cause weight gain by extracting calories from food super-efficiently, Cedars' Ruchi Mathur, who led the study, said: "It could allow a person to harvest more calories from their food."

The breath test could provide a warning that someone is at risk of obesity because he harbors fattening microbiota.

It could also validate what many overweight people have long suspected: if their slim friends eat two slices of bacon-cheeseburger pizza the 600 calories go through them like celery, but if the overweight person indulges then every calorie seems to turn into more fat. People absorb different quantities of calories from the exact same food, thanks to their gut microbiota.

Thursday, March 21, 2013

Whole Milk Linked to Slimmer Kids - Neatorama

Whole Milk Linked to Slimmer Kids - Neatorama

The American Academy of Pediatrics recommends that children switch from whole milk to a lower fat milk at age two. The conventional wisdom is that getting children used to reduced fat milk will help keep them at a healthy weight. Skim, 1%, or 2% milk has fewer calories per cup. It just makes sense, doesn't it?

So here's where things gets confusing. A new study of preschool-aged children published in the Archives of Disease in Childhood, a sister publication of the British Medical Journal, finds that low-fat milk was associated with higher weight.

That's right, kids drinking low-fat milk tended to be heavier.

Thursday, March 07, 2013

Changes in the basal metabolic ... [J Nutr Sci Vitaminol (Tokyo). 1989] - PubMed - NCBI

Changes in the basal metabolic rate of a normal woman induced by short-term and long-term alterations of energy intake. [J Nutr Sci Vitaminol (Tokyo). 1989] - PubMed - NCBI

Abstract

A long-term experiment was carried out to study the effects of alterations in energy intake and meal contents on basal metabolic rate (BMR) of a normal woman. Alterations of energy intake induced changes in BMR and pulse rate in addition to body weight changes. Whether BMR was expressed per whole body, per unit body weight, or per unit body surface area, it increased progressively during long-term overeating periods, and decreased markedly during long-term undereating periods. These results suggest that there exists 'Luxuskonsumption', or adaptive diet-induced thermogenesis, during an overeating period and hypometabolism during an undereating period. BMR was affected significantly by the menstrual cycle but not by nutrient composition when daily energy intake was fixed at 2000 kcal for a long time.

Sunday, March 03, 2013

Discovery Lecture explores brain’s sensitivity to insulin | VUMC Reporter | Vanderbilt University

Discovery Lecture explores brain’s sensitivity to insulin | VUMC Reporter | Vanderbilt University

Diabetes has a big impact on the brain.

Patients with diabetes have more cognitive dysfunction, are at increased risk for developing Alzheimer’s disease, and have higher rates of depression and eating disorders.

What’s going on is the brain is actually a metabolic organ, exquisitely sensitive to insulin, internationally known diabetes researcher C. Ronald Kahn, M.D., said during last week’s Flexner Discovery Lecture/Irwin Eskind Lecture in Biomedical Science at Vanderbilt University Medical Center.

“Changing insulin signaling in the brain changes brain function in terms of things the brain normally does, which is mood and behavior activity,” said Kahn, the Mary K. Iaccoca Professor of Medicine at Harvard Medical School.

Through studies of genetically manipulated “knock-out” mice lacking brain receptors for insulin, Kahn and his colleagues have shown that insulin signaling affects the function of neurotransmitters including dopamine and serotonin, which in turn regulate mood and behavior.

These mice “show increased anxiety and signs of depression, which improve through treatment by antidepressant drugs,” he said.