Tag Archives: Diet & Nutritition

Dr. C "Comments", Men's Health, Studies, Women's Health

DIET STUDIES: HIGH-SUGAR DIETS SUPPRESS DOPAMINE, LEADING TO OVEREATING

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From Phys.org/Univ. of Michigan (June 9, 2020):

High-Sugar Diet Dampens Release of Dopamine Causing Overeating - Univ of Michigan - Credit Christina May and Monica Dus

“On a high-sugar diet, we find that the fruit flies’ dopaminergic neurons are less active, because the high sugar intake decreases the intensity of the sweetness signal that comes from the mouth,” Dus said. “Animals use this feedback from dopamine to make predictions about how rewarding or filling a food will be. In the high-sugar diet flies, this process is broken—they get less dopamine neuron activation and so end up eating more than they need, which over time makes them gain weight.”

It is well known that consuming food and drink high in sugar is not great for us, but scientists are continuing to unravel the intricacies of how the sweet stuff drives negative health outcomes. The latest finding comes from researchers at the University of Michigan, who through studies in fruit flies have found that excess amounts of sugar can shut down crucial neural circuits linked to regulating satiety, possibly leading to overeating in humans.

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COMMENTARY

SUGAR IS A POISON.

A novel illustration of sugars’ lethality was the Georgia sugar refinery explosion in 2008, which killed 14 people. Finely ground sugar is flammable.

Sugar appeared early in civilization, but it was expensive, sparing all but the wealthy of its’ depredations, mainly tooth decay.  Only with the post WWII expansion of wealth was it consumed excessively to produce the diseases of overeating. The developed world now consumes over 70 pounds of sugar per person, amounting to over 250 CALORIES PER DAY!

This  article shows how SUGAR acts like a DRUG In its INTERFERENCE with the DOPAMINERGIC Reward system. The neurons send less signal, so you need MORE SUGAR to satisfy.

The metabolic systems through which overeating and sugar causes the OBESITY, DIABETES, VASCULAR DISEASE and Early DEMENTIA are convoluted.The best detailed explication is in the NEJM article in intermittent fasting, a healthful practice that is the polar opposite of overeating.

Two very important metabolic mechanisms are discussed, the mTOR system and the Sirtuin system. These systems are important for NUTRIENT SENSING and repair, and conserved in all animals. They worked just fine in our early ancestors.

It seems that primitive man was not blessed (or is it cursed) with easy overabundance or food, and actually spent hours or days in Hunger. When times were good, his body put on muscle, and stored fat against the hard times to come. This is called ANABOLISM. When times were bad, his body went into repair mode, and used the fat for energy. This is called CATABOLISM.

Anabolism has evolved expressly for Young Animals, where extra food is welcome for Growth. After the growing and Reproductive years, our Bodies’ evolutionary “warrant” expires, since the genes it carries have already been spread. Our older bodies are left to deal with machinery more suited to an earlier vibrancy. Our metabolism didn’t evolve to deal with the calories we shove into our aging Bodies. Many mechanisms beneficial in the young prove harmful later on. This divergence has been called “ antagonistic pleiotropy”.

Whatever the explanation, the observation remains: if adults eat more than they can use, they gain weight. With insufficient exercise, this weight is fat. With excessive fat, the joints, blood vessels, liver, heart and brain suffer,  and lifespan is shortened.

RETHINK YOUR LIFESTYLE AS SOON AS POSSIBLE. AVOIDING SUGAR, and ALL THINGS CONTAINING SUGAR is as good a place as any to start. You will be rewarded by being able to fully taste and enjoy the natural sweetness of many REAL FOODS, and afforded a longer life to partake in this pleasure.

—Dr. C.

Dr. C "Comments", Men's Health, PODCASTS, Prevention, Women's Health

PODCAST: “MEDDIET” ALTERS GUT MICRIOBIOME IN OLDER PEOPLE, IMPROVES FRAILTY, COGNITION, INFLAMMATION

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We observed that increased adherence to the MedDiet modulates specific components of the gut microbiota that were associated with a reduction in risk of frailty, improved cognitive function and reduced inflammatory status. 

Dr Philip Smith, Digital and Education Editor of Gut and Consultant Gastroenterologist at the Royal Liverpool Hospital interviews Professor Paul O’Toole; who is Professor of Microbial Genomics, Head of School of Microbiology and Principal Investigator in APC Microbiome Ireland, an SFI funded centre at University College Cork, Ireland, on “Mediterranean diet intervention alters the gut microbiome in older people reducing frailty and improving health status: the NU-AGE 1-year dietary intervention across 5 European countries” published in paper copy in Gut in July 2020.

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COMMENTARY

Diet is one of the 3 pillars ( or 4, if you don’t consider intellectual stimulation a form of exercise) of health. And there are 3 prime dimensions to diet: Quality, Quantity, and Timing. This excellent study addresses the Quality of the diet. Vegetables, fruits and whole grains are the foundation.

Dietary Fiber is the main difference between the healthful Mediterranean diet and the highly processed diet so common in America.

How can you be sure you are eating enough fiber? Read on.
On almost all cans and boxes, you will find a nutritional statement, by law. Assuming that the contents are “real food”, and preferably “organic”, look for the “fiber” in grams, and the “calories” in 100’s, and mentally divide the grams of fiber by 100s  of calories, and you get a number. Let’s say that your fiber for the day totals “25” gms. and your calories for the day Totals 2500; that is “25” hundred calories. Divide the 25 grams by the 25 hundred calories, and you get “1”. Anything less than 1 is low in fiber.

25 grams of fiber is about the daily recommendation for fiber. 25 hundred calories is a ballpark figure for an average diet.
PORTION SIZE DOESN’T MATTER, since your dividend is a ratio.
The bacteria in your MICROBIOME feed on the fiber, and the higher and more diverse the fiber ( within reason. Hay is high in fiber) the healthier the food.

Blueberries are good for a fruit at 4-5 gms. of fiber per hundred calories. Broccoli is a good vegetable at 10 gms fiber per hundred calories, carrots about 3, and so on.

Sugar is the perfect “bad” food, at no fiber for as many calories as you can pack in. It makes you Want more, and “desensitizes” your taste buds to the natural sweetness of fruit, or even vegetables.

HIGH FIBER foods are MORE FILLING, leading you to eat less.
Civilization and Capitalism pushes too much food and too many calories at us. Overeating , obesity, and many of the modern illnesses is the result.
Generally, fresh fruits and vegetables are preferred, though cooking doesn’t do much harm, other than some vitamin loss that can be replaced.

Whole grain cereals have fiber in addition to other nutrients. Also, the complex carbohydrates in whole grains  are released more slowly than wIth refined cereals. This floods your blood less rapidly with glucose, and elicits a Less precipitous insulin response. This results in a lower, healthier  “glycemic Index”.

Vegetables, fruits Legumes, seeds, nuts and their oils are the mainstay of the Vegan diet, which is healthful If enough protein and essential fats are ingested.

Fish, eggs, milk and cheeses are other components of the Mediterranean diet.

I take many of my daily Vegetable and fruits and  liquefy them in a food blender. Drinking my daily vegetables and fruits is a tasty and convenient way to improve my diet. I Savor individually those items I find most tasty, like nuts, apples, avocado, And fruit in season. This exercises my jaws, which is probably healthy.

YOUR MICROBIOME helps you in many ways that science is just beginning to understand. A healthy Microbiome is a DIVERSE Microbiome. FIBER is the food of the Microbiome, and a diversity in dietary fiber leads to a diverse Microbiome. A diverse, happy Microbiome produces many biological substances, like neurotransmitters, and probably communicates with the brain directly through the gut-brain Axis.

The Podcast on the 1 year Meddiet showed how directly a diet can BENEFIT HEALTH STATUS.

-Dr. C.

Dr. C "Comments", Men's Health, Resources, Women's Health

INFOGRAPHICS: “WHAT ARE, HOW WE GET AND WHY DO WE EAT FERMENTED FOODS”

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This article gave an interesting classification of fermented foods, pointing out that with some, like bread and wine, we eat the products of fermentation without the living organisms, while with others like kefir and yogurt, we eat the viable critters also.

Lactobacilli are called probiotics, and are supposed to have health benefits. It is not proven that they do, but at least the lactobacilli use up some of the sugar we would otherwise be eating, and taste good.

The problem with the claim that they diversify and benefit our microbiome, and crowd out the bad germs, is that they do not generally attach to our intestinal walls, and go right through with the rest of our food. They don’t stick around long enough to do any good.

My late wife had a bad infection with a bad actor called Clostridium difficile, which caused her to have a severe, bloody enterocolitis. After the second hospitalization with this affliction, an Infectious disease doctor suggested “culturelle”, which contained a patented Lactobacillus rhamnosus GG, which WAS supposedly proven to attach for a while. My wife took this, and never had another attack.

I still take this daily, “on faith”. Gullible me. Fecal transplants are now used effectively for C. Dif. enterocolitis. Avoiding unnecessary antibiotics, which wipe out your normal microbiome, your “good guy competition”, is An even better idea, but seems risky.

BOTTOM LINE:  Kefir and yogurt are calorie depleted, and taste good. What is not to like?

–Dr. C