QOTD: H.L. Mencken on Practical Politics

Posted on September 11, 2019 | Leave a comment

The whole aim of practical politics is to keep the populace alarmed (and hence clamorous to be led to safety) by menacing it with an endless series of hobgoblins, all of them imaginary.

—H.L. Mencken (born in 1880)

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Substitution of Tea or Coffee for Sugar-Sweetened Beverages Linked to Lower Type 2 Diabetes Incidence in Europe

Posted on September 10, 2019 | Leave a comment

Green tea

Sugar-sweetened beverages (SSBs) increase the risk of developing type 2 diabetes. If you want to avoid T2 diabetes, what should you substitute? The study at hand looked at milk, juice, coffee, and tea. Why not water?

From The Journal of Nutrition:

These findings indicate a potential benefit of substituting coffee or tea for SSBs for the primary prevention of T2D and may help formulate public health recommendations on beverage consumption in different populations.

Source: Estimated Substitution of Tea or Coffee for Sugar-Sweetened Beverages Was Associated with Lower Type 2 Diabetes Incidence in Case–Cohort Analysis across 8 European Countries in the EPIC-InterAct Study | The Journal of Nutrition | Oxford Academic

Steve Parker, M.D.

Steve Parker MD, Advanced Mediterranean Diet

Two diets in one book, including the Ketogenic Mediterranean Diet

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Posted in Diabetes, Sugar Substitutes

If Gut Bacteria Cause Alzheimer’s Dementia, What If You Alter Those Bacteria?

Posted on September 8, 2019 | 2 comments

The short answer? We don’t know the answer to either of those questions.

Low-carb salad

The gut bacteria (aka microbiome) seem to be able to decrease or increase inflammation that could cause or exacerbate Alzheimer’s dementia. The  microbiome’s effect on inflammation depends on the species of bacteria present, and the amount of those bacteria. At least one study found that Alzheimer’s patients have a greater abundance of the pro-inflammatory species and less of the anti-inflammatory species, compared to other folks.

Researchers with Wake Forest School of Medicine tried to find answers to the questions in the title of this post. (Click for full text.) They studied 17 experimental subjects, average age 64, who had mild cognitive impairment (11) or “cogni/subjective memory complaints” (6). God bless them for submitting to three spinal taps apiece. The experimental diets were 1) Mediterranean-Ketogenic (under 20 g carb/day), or 2) Low-fat American Heart Association diet (under 40 g fat/day). Participants were on each diet for six weeks.

The investigators didn’t find anything useful for those of us trying today to avoid Alzheimer’s or prevent the progression of mild cognitive impairment to dementia. Their bottom line is, “The data suggest that specific gut microbial signatures may depict [characterize] the mild cognitive impairment and that the modified Mediterranean-ketogenic diet can modulate the gut microbiome and metabolites in association with improved Alzheimer’s disease biomarkers in cerebrospinal fluid.”

So we won’t know for several more years, if ever, whether intentional modification of diet will “improve” our gut microbiomes, leading to lower risk of dementia.

What we have known for many year, however, is that the traditional Mediterranean diet is linked to lower risk of Alzhiemer’s dementia.

For more details, see Science Daily:

In a small pilot study, the researchers identified several distinct gut microbiome signatures — the chemicals produced by bacteria — in study participants with mild cognitive impairment (MCI) but not in their counterparts with normal cognition, and found that these bacterial signatures correlated with higher levels of markers of Alzheimer’s disease in the cerebrospinal fluid of the participants with MCI.

Through cross-group dietary intervention, the study also showed that a modified Mediterranean-ketogenic diet produced changes in the gut microbiome and its metabolites that correlated with reduced levels of Alzheimer’s markers in the members of both study groups.

Source: Diet’s effect on gut bacteria could play role in reducing Alzheimer’s risk — ScienceDaily

Steve Parker, M.D.

Steve Parker MD, Advanced Mediterranean Diet

Two diets in one book, including the Ketogenic Mediterranean Diet

Click the pic to purchase the world’s first practical ketogenic Mediterranean diet at Amazon.com

 

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Posted in Alzheimer Disease, Dementia, Low-Carb Eating, Low-Carb Mediterranean Diet

Mediterranean Diet May Prevent Multiple Sclerosis

Posted on September 7, 2019 | Leave a comment

MRI scan of brain, commonly done to evaluate for MS and demyelination

Multiple sclerosis is a disease of unknown cause characterized by demyelination (loss of the protective coating around nerves) in the brain.

From The Journal of Nutrition:

A Mediterranean diet, including unprocessed red meat, was associated with reduced risk of [first clinical diagnosis of brain demyelination] in this Australian adult population. The addition of unprocessed red meat to a Mediterranean diet may be beneficial for those at high risk of [multiple sclerosis].

Source: Higher Mediterranean Diet Score, Including Unprocessed Red Meat, Is Associated with Reduced Risk of Central Nervous System Demyelination in a Case-Control Study of Australian Adults | The Journal of Nutrition | Oxford Academic

Steve Parker MD, Advanced Mediterranean Diet

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Association of Intensive vs Standard Blood Pressure Control With Brain Small Vessel Ischemic Disease

Posted on September 5, 2019 | Leave a comment

Not good enough

Aiming for systolic blood pressure of 120 or less (instead of 140) may reduce the risk of age-related brain impairment. A recent study suggests the mechanism is better brain blood flow.

The 2017 guidelines from the American College of Cardiology recommend a BP treatment goal of under 130/80.

Ischemia means poor or no blood flow.

Small vessel ischemic disease (SVID in the brain) is something I see so often on CT scans of 70-year-olds that I usually ignore it. Mind you, I’m a hospitalist and usually looking for acute major strokes, brain tumors, and bleeding on CT scans. SVID is a chronic disease and it’s often difficult to say how long a specific lesion has been present and whether it’s causing symptoms. Ischemia in the brain is linked to impaired cognitive functioning and dementia. On the other hand, some brain ischemic lesions don’t seem to cause any detectable impairment.

From JAMA Network:

Question:  Is intensive blood pressure treatment associated with less progression of small vessel ischemic disease, as reflected by cerebral white matter lesion volume?

Findings:  In this substudy of a randomized clinical trial of 449 hypertensive patients with longitudinal brain magnetic resonance imaging, intensive blood pressure management to a target of less than 120 mm Hg, vs less than 140 mm Hg, was associated with a smaller increase in white matter lesion volume (0.92 cm3 vs 1.45 cm3).

Meaning:  More intensive blood pressure management was associated with less progression of cerebral small vessel ischemic disease, although the difference was small.

Source: Association of Intensive vs Standard Blood Pressure Control With Cerebral White Matter Lesions | Dementia and Cognitive Impairment | JAMA | JAMA Network

Steve Parker, M.D.

PS: The Mediterranean diet also reduces dementia and cognitive impairment.

Steve Parker MD, Advanced Mediterranean Diet

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Posted in Dementia, High Blood Pressure

Which Is Better at Reducing Insulin Resistance: Alternate-Day Fasting or Daily Calorie Restriction?

Posted on September 3, 2019 | Leave a comment

Horses, like Java, also get Metabolic Syndrome but it’s not quite the same as in humans. Java had to lose weight and change his diet.

Body tissue resistance to the effect of insulin is considered harmful by many experts. For instance, it may contribute to obesity, high blood pressure, type 2 diabetes, and cancer. BTW, if you have Metabolic Syndrome, you probably have insulin resistance. Regular exercise and loss of excess body fat are two ways  to reduce insulin resistance. Fasting also has an effect, but is it better than daily calorie restriction?

From the journal Obesity:

Abstract

Objective

This study compared the effects of alternate‐day fasting (ADF) with those of daily calorie restriction (CR) on body weight and glucoregulatory factors in adults with overweight or obesity and insulin resistance.

Methods

This secondary analysis examined the data of insulin‐resistant individuals (n = 43) who participated in a 12‐month study that compared ADF (25% energy needs on “fast days”; 125% energy needs on alternating “feast days”) with CR (75% energy needs every day) and a control group regimen.

Results

In insulin‐resistant participants, weight loss was not different between ADF (−8% ± 2%) and CR (−6% ± 1%) by month 12, relative to controls (P < 0.0001). Fat mass and BMI decreased (P < 0.05) similarly from ADF and CR. ADF produced greater decreases (P < 0.05) in fasting insulin (−52% ± 9%) and insulin resistance (−53% ± 9%) compared with CR (−14% ± 9%; −17% ± 11%) and the control regimen by month 12. Lean mass, visceral fat mass, low‐density lipoprotein cholesterol, high‐density lipoprotein cholesterol, triglycerides, blood pressure, C‐reactive protein, tumor necrosis factor α, and interleukin 6 values remained unchanged.

Conclusions

These findings suggest that ADF may produce greater reductions in fasting insulin and insulin resistance compared with CR in insulin‐resistant participants despite similar decreases in body weight.

Source: Differential Effects of Alternate‐Day Fasting Versus Daily Calorie Restriction on Insulin Resistance – Gabel – – Obesity – Wiley Online Library

It would be interesting to compare the compliance and drop-out rates between the two groups studied. Is a daily 24% calorie deficit easier to stomach than a 75% reduction every other day?

Steve Parker, M.D.

Steve Parker MD, Advanced Mediterranean Diet

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The Oldest Folks in the World May Not Be THAT Old

Posted on August 29, 2019 | Leave a comment

A healthy diet has room for grapes

In The Blue Zones book, Dan Buettner discusses geographic regions where people live significantly longer than average. Sardinia, for example.

From Vox:

We’ve long been obsessed with the super-elderly. How do some people make it to 100 or even 110 years old? Why do some regions — say, Sardinia, Italy, or Okinawa, Japan — produce dozens of these “supercentenarians” while other regions produce none? Is it genetics? Diet? Environmental factors? Long walks at dawn?

A new working paper released on bioRxiv, the open access site for prepublication biology papers, appears to have cleared up the mystery once and for all: It’s none of the above.

Instead, it looks like the majority of the supercentenarians (people who’ve reached the age of 110) in the United States are engaged in — intentional or unintentional — exaggeration.

Source: Study: many of the “oldest” people in the world may not be as old as we think – Vox

Steve Parker, M.D.

PS: The Mediterranean diet has long been linked to longevity.

Steve Parker MD, Advanced Mediterranean Diet

Click the pic to purchase at Amazon.com

 

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Posted in Longevity