Category Archives: Diets - Page 19

Update

In the latest installment of a debate I commented on earlier, T. Colin Campbell continues to bear no resemblance to a scientist (“critics like her would like nothing better than to get me to spend all my time answering detailed questions, but I simply will not do this”).

Denise Minger, who is only 23, continues to resemble a fine one.

The Danger of Protein During Pregnancy

At PerfectHealthDiet.com we’re advocates of protein restriction. We recommend:

  • Avoiding all protein-containing plants, as plant proteins tend to be toxic;
  • Striving to eat fatty, not lean, meats and fish, in order to keep protein intake down and fat intake up.

Protein restriction helps protect against viral and bacterial infections by promoting autophagy, the process of intracellular protein scavenging, digestion, and recycling.  During autophagy, bacteria and viruses, as well as junk human proteins and damaged organelles, are digested.  Autophagy has been strongly linked to longevity [1] and is protective against many diseases.

Our advocacy of low protein intake separates us from many other Paleo bloggers.  Loren Cordain, the dean of the Paleo movement, has long advocated consumption of lean meats.  Although he has moderated his stance somewhat, the front page of his site still places lean meats first among his favored foods:

Learn how a diet based on lean meats

The Paleo Diet is a way of eating in the modern age that best mimics diets of our hunter-gatherer ancestors – combinations of lean meats

(The other major difference we have with Dr. Cordain is his exclusion of starchy foods from a “Paleo” diet, even though starchy tubers have been part of the ancestral human diet for 4 million years. But that is a story for another day.)

Those who have read the pre-publication draft of our book know that we place high store on human breast milk as an indicator of the optimal composition of the human diet.  Human breast milk provides only 7% of calories in the form of protein. (Carbs are about 38% and fats about 55%.) One can debate whether 7% is the right level of protein for adults; but, if the principle of natural selection is sound, it must be that infants need a low-protein diet.

Science bears this out.  As our book notes, diets containing 20% of calories as protein are highly toxic to infants. Pre-term infants fed 20% protein diets had more fever, lethargy, and poor feeding than infants fed 10% protein diets, and lower IQs at ages 3 and 6 years. [2] Even a slight increase in the protein content of formula, from 7% to 9%, significantly increased the likelihood that babies would be overweight by age 2. [3]

Given our skepticism toward high-protein diets, especially for babies, we were pleased to see Dr. Cordain in his most recent newsletter [The Paleo Diet Update v6, #20 – Protein Intake for Pregnant Women] acknowledge the dangers of high protein intake by pregnant mothers. Dr. Cordain advises a pregnant mother:

[Y]ou probably should increase your fat and carbohydrate consumption, and limit protein to about 20-25% of energy, as higher protein intakes than this may prove to be deleterious to mother and fetus for a variety of physiological reasons….

“Protein intakes above this [25% of total calories] threshold may affect pregnancy outcome through decreased mass at birth and increased perinatal morbidity and mortality.” [4]

The physiological basis for this aversion stems from a reduced rate of urea synthesis during pregnancy that is evident in early gestation [5] as well as increases in the stress hormone cortisol [6]. Hence, pregnant women should include more carbohydrate and fat (i.e. fattier meats) in their diets and limit dietary protein to no more than 20-25% of their total caloric intake.

What are the long-term effects of a high-protein diet during pregnancy on the offspring?  In long-term follow-up studies of the adult children of mothers who ate high protein diets while pregnant between 1948 and 1954, it was found that by age 40 offspring commonly had high levels of the stress hormone cortisol [6] and high blood pressure [7,8].  The effects of faulty maternal diets can be long-lasting.

At PerfectHealthDiet.com, we think 20% is still likely to be a bit more protein than is desirable. We would advise pregnant mothers to restrict protein to about 15% of calories and to strive to obtain 30% of calories as carbohydrates.  As long as adequate carbs are obtained, there is only a modest need for protein and as little as 10% of calories as protein may be sufficient.

Note that this advice is very close to the ratios of 30% carb, 15% protein, and 55% fat that we recommend to adults and children generally.  Pregnant women may benefit from slightly more starch and slightly less protein than others; but on the Perfect Health Diet, pregnancy should not require a significant change in eating habits.

[1] Jia K, Levine B. Autophagy is required for dietary restriction-mediated life span extension in C. elegans. Autophagy. 2007 Nov-Dec;3(6):597-9. http://pmid.us/17912023.

[2] Goldman HI et al. Clinical effects of two different levels of protein intake on low-birth-weight infants. J Pediatr. 1969 Jun;74(6):881-9. http://pmid.us/5781798. Goldman HI et al. Effects of early dietary protein intake on low-birth-weight infants: evaluation at 3 years of age. J Pediatr. 1971 Jan;78(1):126-9. http://pmid.us/5539071. Goldman HI et al. Late effects of early dietary protein intake on low-birth-weight infants. J Pediatr. 1974 Dec;85(6):764-9. http://pmid.us/4472449.

[3] Koletzko B et al; European Childhood Obesity Trial Study Group. Lower protein in infant formula is associated with lower weight up to age 2 y: a randomized clinical trial. Am J Clin Nutr. 2009 Jun;89(6):1836-45. http://pmid.us/19386747.

[4] Speth JD. Protein selection and avoidance strategies of contemporary and ancestral foragers: unresolved issues. Philos Trans R Soc Lond B Biol Sci. 1991 Nov 29;334(1270):265-9; discussion 269-70. http://pmid.us/1685584.

[5] Kalhan SC. Protein metabolism in pregnancy. Am J Clin Nutr. 2000 May;71(5 Suppl):1249S-55S. http://pmid.us/10799398.

[6] Herrick K et al. Maternal consumption of a high-meat, low-carbohydrate diet in late pregnancy: relation to adult cortisol concentrations in the offspring. J Clin Endocrinol Metab. 2003 Aug;88(8):3554-60. http://pmid.us/12915635.

[7] Campbell DM et al. Diet in pregnancy and the offspring’s blood pressure 40 years later. Br J Obstet Gynaecol. 1996 Mar;103(3):273-80. http://pmid.us/8630314.

[8] Shiell AW et al. High-meat, low-carbohydrate diet in pregnancy: relation to adult blood pressure in the offspring. Hypertension. 2001 Dec 1;38(6):1282-8. http://pmid.us/11751704.

The China Study: Evidence for the Perfect Health Diet

T. Colin Campbell became famous for his book The China Study, which claims that a Chinese epidemiology study supports a vegetarian diet.  Chris Masterjohn pointed out some time ago that Campbell’s conclusions had little basis in the study data. [1] Now, Denise Minger has delved into the raw data and shows clearly that Campbell has presented “a strongly misleading interpretation of the original China Study data.” [2] She concludes:

Campbell’s “China Study” book is a spectacular example of how you can cherry-pick data to create a trend that isn’t there. [3]

Campbell’s recommended diet is very different from the Perfect Health Diet. Although hardly carnivores, we at PerfectHealthDiet.com are not idolators of plant foods. Plants have much higher toxin levels than animal foods, and are more difficult to digest. Fiber is often adduced as a reason to eat plant foods, but fiber’s influence on gut bacteria is complex; not all plant fiber improves the composition of gut flora.

We recommend eating daily some safe starches (sweet potato and taro are our favorites; white rice is quick and easy), fruits and berries, seaweed, and assorted vegetables.  We eat vegetables mostly to improve the flavor of our meals. What would a beef stir fry, chicken soup, omelette, or bibimbap be without vegetables?

But, though plant foods constitute 50-70% of the mass of food eaten on our diet, we recommend that carbs provide only 20% of calories.

So, now that Ms. Minger has summarized a lot of the data from the China Study, I thought it would be interesting to see whether the China Study data is supportive of the Perfect Health Diet. The China Study data, as summarized by Ms. Minger, is relevant to four of our claims.

1. Animal Proteins Are Preferable To Plant Proteins

The Perfect Health Diet deprecates plant proteins (which are often toxic) and recommends that protein be obtained from meat, fish, and eggs.  However, we also recommend lower levels of protein consumption than other Paleo diets. We personally obtain about 10% of calories from protein.

So, did the China Study prefer plant or animal sources of protein?  And what is its result for total protein intake?

Ms. Minger reports how protein intake is associated with cancer deaths:

[W]hen we look solely at the variable “death from all cancers,” the association with plant protein is +12. With animal protein, it’s only +3. [2]

The positive numbers mean that more protein is associated with more cancer deaths, suggesting that Chinese should eat less protein.  Since the plant protein association is higher than the animal protein, it’s better to eat animal protein than plant protein.  Just as we would expect!

What about heart disease?

Correlation between animal protein and myocardial infarction and coronary heart disease: +1

Correlation between fish protein and myocardial infarction and coronary heart disease: -11

Correlation between plant protein and myocardial infarction and coronary heart disease (from the China Study’s “diet survey”): +25

Correlation between plant protein and myocardial infarction and coronary heart disease (from the China Study’s “food composite analysis”): +21

Looking at myocardial infarction and coronary heart disease, fish protein was apparently protective (perhaps because it comes with omega-3 fats), animal protein was neutral (as we would expect from healthy protein, which is fairly innocuous health-wise), and plant protein was harmful (as we would expect from toxins).

2. Dairy Fats Good, Dairy Proteins Problematic

The Perfect Health Diet strongly approves of dairy fats (such as butter and heavy cream – clarified butter or ghee for those with dairy sensitivity) and approves of fermented dairy products (yogurt, cheese), but recommends avoiding most dairy protein – especially products containing pasteurized cow casein that has not been pre-digested by bacteria.

In the China Study, dairy proteins seem to have a strong relation to high blood pressure. Ms. Minger notes the following correlations with hypertension:

Milk and dairy products intake: +30

Egg intake: -28

Meat intake: -4

Fish intake: -14

Meat, fish, and eggs are all healthy.  Milk and dairy products – higher blood pressure.  Presumably this is because of the casein.

Cow casein, especially the pasteurized form which is difficult to digest, has various well-documented problems. Ms. Minger cites several studies showing that cow casein increases cancer growth, while milk whey and other protein sources are benign. [2]

3. Grains Are Bad; But Rice Is OK

The Perfect Health Diet strongly recommends eliminating all grains except rice.  Wheat, which has an exceptionally high toxin load, is strongly deprecated.  Rice, on the other hand, is accounted along with taro, sweet potatoes, and other underground starch storage organs among our “safe starches.”

Ms. Minger notes the extraordinary correlations of wheat consumption with disease rates:

Why does Campbell indict animal foods in cardiovascular disease (correlation of +1 for animal protein and -11 for fish protein), yet fail to mention that wheat flour has a correlation of +67 with heart attacks and coronary heart disease, and plant protein correlates at +25 with these conditions?

Speaking of wheat, why doesn’t Campbell also note the astronomical correlations wheat flour has with various diseases: +46 with cervix cancer, +54 with hypertensive heart disease, +47 with stroke, +41 with diseases of the blood and blood-forming organs, and the aforementioned +67 with myocardial infarction and coronary heart disease? (None of these correlations appear to be tangled with any risk-heightening variables, either.) [2]

Wheat was, indeed, by far the most toxic food found in The China Study.  It consistently produced the highest correlations with disease. Ms. Minger concludes:

[W]heat may be one of the most toxic things you could ever put in your mouth. [3]

Note that almost everyone in China eats substantial amounts of either rise or wheat; the people who eat little wheat eat a lot of rice.  Wheat has a high correlation with disease only because rice is anti-correlated with disease. If rice were not safe, wheat would not appear so dangerous.

In fact, the correlation coefficient of rice with heart disease deaths is -58%, almost the opposite of the +67% for wheat. Other grains had a correlation coefficient of +39%. [4] So: rice good, other grains bad, wheat worst of all.

4. Calories Should Come Predominantly From Fat

The Perfect Health Diet recommends obtaining most calories from fat:  the ideal macronutrient ratio is around 20% carbs, 10% protein, and 70% fat by calories.  These fat calories should consist of saturated and monounsaturated fats; polyunsaturated fats should be less than 5% of calories.

No region in China eats at these macronutrient ratios, but one comes substantially closer than others:  the county of Tuoli. [5] Located in the far northwest of China, Tuoli is occupied by a herding people who traditionally eat a great deal of dairy and meat but very few vegetables.

While the average macronutrient intake of all counties in the China Study was 74% carbs, 10% protein, 16% fat, the macronutrient intake in Tuoli was 35% carbs, 19% protein, and 46% fat.

Helping the comparison with the Perfect Health Diet, the Tuoli obtain their fats predominantly from dairy and meat; these contain few polyunsaturated fats. Plant oils, legumes, nuts, eggs, and fish are all non-existent in their diet; so we can be sure they aren’t eating soybean oil, canola oil, or corn oil.

So how do the people of Tuoli stack up in health compared to the rest of China?  Pretty well.

Death from all causes for people under the age of 65 was lower in Tuoli county than in 11 of the 13 counties that ate the least animal protein.

This excellent result was achieved even though the people of Tuoli are among the highest consumers of wheat in China:  they average 0.82 pounds per day of wheat flour.  Without their high consumption of this most toxic of foods, Tuoli county might have the best health in China. Add another point in favor of fat-rich diets.

But What About Seaweed?

In reading Ms. Minger’s discussion, I was able to find only a few correlations that went the wrong way. The only significant one was the correlation of sea vegetables with colorectal cancer (+76%). We highly recommend seaweed consumption, in part for its high content of iodine and other micronutrients.

However, as Ms. Minger notes, the association of seaweed with colorectal cancer is the result of a confounding factor. The areas of China that eat a lot of seaweed have very high rates of schistosomiasis infection, which is an extremely strong promoter of colorectal cancer.  

Conclusion

At least in the data provided by Ms. Minger, there appears to be no data from the China Study that contradicts a recommendation of the Perfect Health Diet, and plenty of data that support our recommendations.

It seems that the China Study is much more supportive of the Perfect Health Diet than of T. Colin Campbell’s diet! 

This doesn’t surprise us:  the Perfect Health Diet is the result of a rigorous five year search through the literature, and every recommendation has, we believe, the weight of scholarly evidence behind it.  But it’s nice to examine new data and find that it agrees with our findings. I’m tempted to look into the raw data of the study, now available from Oxford University’s web site [6], to see if the rest of the study is also supportive of our recommendations.

Thanks much, Denise, for your work. Bravo!  A fine analysis of a large data set.

References

[1] Chris Masterjohn, http://www.cholesterol-and-health.com/China-Study.html.

[2] Denise Minger, http://rawfoodsos.com/2010/07/07/the-china-study-fact-or-fallac/. Hat tip Stephan Guyenet, for the link.

[3] Denise Minger, http://rawfoodsos.com/2010/05/25/exciting-update/.

[4] Brad Marshall, http://bradmarshall.blogspot.com/2005/12/is-wheat-killing-us-introduction-maybe.html

[5] Denise Minger, http://rawfoodsos.com/2010/06/23/tuoli-chinas-mysterious-milk-drinkers/.

[6] “Diet, Lifestyle and Mortality in China,” http://www.ctsu.ox.ac.uk/~china/monograph/chdata.htm.

Eleven Steps for Overcoming Alzheimer’s and Other Chronic Infectious Diseases

If Alzheimer’s is due to bacterial infection, as I suggested yesterday (https://perfecthealthdiet.com/?p=126), then it can be treated by diet, supplements, and antibiotics.

Here are eleven steps that can help defeat chronic bacterial infections, including the infections that cause Alzheimer’s. (Note:  I will justify each of these eleven steps, and cite to the scientific literature, in follow-up posts.)

1. Normalization of Vitamin D Levels.

Vitamin D is needed for the transcription of anti-microbial peptides, such as the cathelicidin LL-37 and beta-defensin, which are essential for defense against intracellular bacteria and viruses. Vitamin D deficiency is a risk factor for every chronic infection, and chronic infections tend to increase in frequency with latitude and progress most rapidly during the winter when vitamin D levels are low.  In general, a serum 25-hydroxyvitamin D3 level of 40 ng/ml (100 nmol/L in SI units) is a good target. (Some people, such as Dr. John Cannell of the Vitamin D Council, believe there may be benefits to higher levels, but this is speculative.)

2. Restriction of Carb Intake to 400 Calories Per Day.

Eating a carb-rich diet is doubly bad:  it increases blood glucose levels and triggers insulin release, both of which promote bacterial infections.

Intracellular parasitic bacteria need glucose or its glycolytic products to obtain energy. Abundant cellular glucose, caused by high blood glucose levels, enable them to reproduce and generate immune-impairing proteins more prolifically.

Insulin represses immune defenses against parasitic bacteria, by blocking production of antimicrobial peptides.

To keep both blood glucose and insulin levels low, carbohydrate consumption should be restricted to about 400 calories per day – the amount in 0.3 pounds of cooked white rice, or 1.3 pounds of sweet potatoes.

3. Restriction of Protein.

Eating minimal protein helps in two ways: it deprives bacteria of amino acids necessary for growth, like tryptophan; and it promotes autophagy, the primary means by which cells kill intracellular pathogens.

Indeed, the body’s primary defense mechanism against C. pneumoniae is tryptophan deprivation. This is why people with chronic brain infections have symptoms of serotonin deprivation, including depression, anxiety, insomnia, fatigue, impaired ability to concentrate, and low self-confidence. It’s important not to relieve this by tryptophan or 5-HTP supplementation, both of which promote bacterial growth. If symptoms are intolerable, selective serotonin reuptake inhibitor (SSRI) antidepressants, like Prozac, Paxil, or Zoloft, might be able to provide symptomatic relief. (NB: We neither recommend nor disparage these drugs.)

4. Intermittent Fasting

Autophagy is the garbage collection and recycling process of human cells.  When resources are scarce, cells turn on recycling programs and send garbage collectors known as lysosomes to engulf and digest junk proteins and damaged organelles, enabling re-use of their amino and fatty acids.

Autophagy is a key part of the immune defense against parasitic bacteria.  Lysosomes not only digest human junk, they seek out bacteria and digest them. 

Autophagy is strongly turned after about 16 hours of fasting. The longer one fasts, the more parasitic bacteria are destroyed in lysosomes.  Fasting is an easy way to improve the relative balance of power between your body and intracellular pathogens. Fasting strongly promotes autophagy in neurons, and is of therapeutic value for Alzheimer’s.

A simple strategy of intermittent fasting is to confine meals to an 8-hour window each day, thus engaging in a daily 16 hour fast.  On this strategy, one might eat only between noon and 8 pm.

5. Ketogenic Fasting.

Two dangers of fasting are that it can lead to loss of muscle tissue as protein is consumed to generate ketones and glucose, and that neurons may be put under stress by glucose deprivation.

Both dangers can be ameliorated by eating ketogenic fats during the fast.  “Ketogenic” means generative of ketone bodies. Ketone bodies, which are generated from fats or some proteins during fasting, are the only neuronal energy source that bacteria can’t steal. There is a large literature showing that high circulating ketone levels are neuroprotective, and ketogenic diets have been successfully tested as Alzheimer’s therapies.

The most ketogenic fats are the short- and medium-chain fats found abundantly in coconut oil. Taking plentiful fat calories from coconut oil, but no carb or protein calories and few other fats, can enable fasts to be extended substantially longer with minimal loss of muscle tissue or neuronal stress.

On a ketogenic fast, eliminate carbs and protein for a 36-hour period, from dinner one day to breakfast on the second day.  During the intervening day, eat no protein or carbs, but do eat as much coconut oil as you like.

There is no limit on how much coconut oil may be consumed – but 12 tablespoons per day would produce a surfeit of ketones. NB: Always drink plenty of water during a fast. We also drink coffee with plentiful heavy cream.

6. Elimination of Wheat and Other Grains. 

Wheat is a toxic food that interferes with immune defenses and impairs vitamin D function. It also generates antibodies to the thyroid, which damage the thyroid status and further impair immune function.

7. Elimination of Omega-6-Rich Oils and Inclusion of Omega-3-Rich Fish.

A diet that minimizes omega-6 content by replacing soybean oil, corn oil, canola oil, and other omega-6 rich oils with butter, coconut oil, and beef tallow, and gets adequate omega-3 fats by eating salmon or other cold-water fish, optimizes the immune defense against intracellular pathogens.

A high omega-6 and low omega-3 diet weakens immune defenses against intracellular pathogens and re-directs the immune system toward extracellular threats.

Note that the combination of carbohydrate, protein, and omega-6 fat restriction necessarily means that half or more of calories should be obtained from saturated and monounsaturated fats.  It is important not to have a saturated fat phobia if you want to escape or defeat Alzheimer’s!

8. Fructose Minimization.

Fructose is a toxin and is deprecated on the Perfect Health Diet. One of its worst features is that promotes infections. In mice, blood levels of endotoxin, a bacterial waste product, are higher on a fructose-rich diet than on any other diet.

Therefore, sugary foods like soft drinks should be eliminated.  Fruit and berries are OK in moderation.  We recommend no more than 2 portions of fruit and berries per day. Most carb calories should be obtained from starchy foods, like sweet potatoes or taro or white rice.

9. Melatonin supplementation. 

Whereas vitamin D is the “daylight hormone,” melatonin is the “hormone of darkness.”  It is generated during sleep, and is favored by darkness.  Even a little bit of light at night, like the LEDs of an alarm clock or streetlights shining through a window, can disrupt melatonin production.

Melatonin is extremely important, not least because it has powerful antibiotic effects.

To maximize melatonin production, everyone should sleep in a totally darkened room, with windows covered by opaque drapes and all lights extinguished and LCD or LED clocks turned face down.

Unfortunately, people with chronic bacterial infections will generally still be melatonin-deficient, for the same reason they are serotonin-deficient:  melatonin is derived from tryptophan and serotonin. Fortunately, melatonin is easily supplemented.

A melatonin tablet can be allowed to dissolve in the mouth just before bed. High doses will generally produce a deep sleep followed by early waking; this can be remedied by using time-release capsules, or by reducing the dose.

10. Selenium and Iodine Supplementation and Thyroid Normalization.

This is basic for good health in all contexts, but optimizing thyroid hormone levels and maintaining iodine and selenium status are especially important for anyone with an infection.

Both selenium and iodine are required for proper immune function. To get iodine, white blood cells will strip iodine from thyroid hormone; for this reason, people with chronic infections are often somewhat hypothyroid, as indicated by TSH levels above 1.5.

There are too many tricks and pitfalls to thyroid normalization to describe the whole issue here, but a good start is to eliminate wheat from the diet, and to obtain 200 mcg selenium and at least 400 mcg iodine per day. Do not get too much selenium as it is toxic.  Selenium and iodine may be obtained from foods:  two to three Brazil nuts a day for selenium, and seaweed for iodine.

11. Vitamin C and Glutathione or NAC Supplementation.

These are important for immune function. Vitamin C supplementation is an important safety precaution because infections greatly increase the rate of loss of vitamin C, and can generate tissue scurvy with devastating consequences.

Glutathione is destroyed by stomach acid. We recommend buying reduced glutathione and taking it with a full glass of water on an empty stomach, at least 2 hours after and 1 hour before taking food. Alternatively, N-acetylcysteine (NAC) and glycine-rich foods like gelatin may be taken to promote glutathione synthesis.

Conclusion

This is by no means an exhaustive list of dietary and nutritional steps that can help against chronic infections.  However, we believe these are the most powerful and important steps.

Alzheimer’s and other diseases caused by chronic bacterial infections – possibly including multiple sclerosis, Lyme disease, chronic fatigue syndromes, fibromyalgia, rheumatoid arthritis, and many others – are preventable, treatable, and often curable.  These dietary steps, along with appropriate antibiotic therapy, are keys to a cure.