Apr
23
2016

Healing Powers Of Green Tea

Powerful catechins that are a special form of bioflavonoids provide the healing powers of green tea. Researchers have proven that these catechins are only in green tea, not so much in black tea. The most effective of several catechins contained in green tea is EGCG, which stands for EpiGalloCatechin-3-Gallate. It crosses the blood/brain barrier and is very important for the protection of the brain from Alzheimer’s disease. But green tea or green tea extract has a diversified pharmacological action. Researchers said that green tea protects you from cardiovascular disease, from obesity, from diabetes, from autoimmune disorders, from cancer, from Alzheimer’s and dementia.

In the following I like to comment on how green tea or its extract can protect from all of these diseases.

Alzheimer’s disease

Although there are 5 or 6 approved anti-Alzheimer’s drugs, none of them work for very long. They may at best postpone the deteriorating memory for 6 months, but then the effect of the drug wears off. The reason is that the drugs do not stop the production of the deadly beta-amyloid. It is the beta-amyloid that damages nerve cells that you want to preserve so you can think and memorize. In contrast a simple phytochemical, the catechin EGCG has been shown in animal experiments and in human trials to stop beta-amyloid production and increase solubility of beta-amyloid fragments in the brain. The end result is better memory and no further deterioration.

Two studies showing less strokes and better working memory processing with green tea

In a study of 13,988 elderly Japanese observed over 3 years the group that consumed 3 to 4 cups of green tea daily had 33% less strokes, cognitive impairment and osteoporosis.

Researchers at the University of Basel, Switzerland enrolled 12 healthy volunteers aged 21 to 28 and fed them extracts of green tea or placebo fluid via feeding tubes. They did this to rule out taste as a factor. The patients underwent functional MRI scans and they also received memory-stimulating tasks. Only the green tea extract was boosting activity in the frontal brain of the subjects. This was located in a specific area, called dorsolateral prefrontal cortex. This area has a connection with language comprehension, reasoning and learning. It also switches short-term memory into long-term memory, called working memory processing.

Healing powers of green tea through new nerve cell development

Researchers showed with animal experiments that green tea extract protects nerve cells from the toxic effect of beta-amyloid. At the same time green tea extract triggers the production of new brain nerve cells (neurons). This is really good news for Alzheimer’s disease patients and their families: green tea extract delays further memory deterioration and stimulates the development of new nerve cells in the brain!

Cardiovascular disease

In a 2006 Japanese study 40,530 Japanese adults aged 40 to 79 years without history of stroke, coronary heart disease, or cancer at baseline were observed for 7 years. Diaries were kept about how many cups of green tea each person was drinking per day. The prevention of heart attacks and strokes was the the biggest effect of green tea extracts.

Men had a mortality reduction of 12% for heart attacks when they drank 5 cups or more of green tea; in women the corresponding mortality reduction for heart attack was 31%, a bigger effect. Overall mortality from strokes was lower than from heart attacks. This made the effect of green tea consumption even more beneficial with respect to stroke prevention. This study did not show any cancer prevention effect for green tea.

Obesity

It appears that green tea increases heat production and burns fat in the process. There was a small effect in terms of weight loss and a beneficial effect increasing the protective HDL cholesterol in this 2012 Polish study on obese patients. The authors compared either 379 mg of green tea extract, or a placebo, daily for 3 months. They concluded: “The results of this study confirm the beneficial effects of green tea extract supplementation on body mass index, lipid profile, and total antioxidant status in patients with obesity.”

Diabetes

Although there are claims in some studies that green tea would prevent diabetes, this question was thoroughly investigated in this Chinese 2014 study.

Researchers did not see any effects on fasting blood sugars or on hemoglobin A1C values. Hemoglobin A1C is a very sensitive indicator for the presence or absence of diabetes. All these lab tests showed no change following consumption of green tea or green tea extract. Forget using green tea for diabetes prevention; cut out sugar and starchy foods instead.

Autoimmune disorders

Sjogren’s syndrome and lupus are both autoimmune diseases. Green tea extract has shown in humans that symptom severity can improve; green tea polyphenols (GTPs) possess anti-inflammatory properties that benefit patients with autoimmune diseases.

In an animal model arthritis researchers determined that T helper cells are weakened and bone resorption is inhibited by EGCG from green tea extract.

Researchers at Harvard Medical School, Boston, MA have noted that green tea extract is useful in calming down the immune response in autoimmune diseases. They concluded: “Altogether, these studies identify and support the use of EGCG as a potential therapeutic agent in preventing and ameliorating T cell-mediated autoimmune diseases.”

Cancer

Many researchers found that EGCG from green tea extract has immune modulatory effects. Furthermore, they saw a positive effect when patients received EGCG in combination with chemotherapy. A combination of cisplatin therapy with green tea extract has been found to have more effects on colorectal cancer and ovarian cancer than each one on its own. Similarly chemotherapy of breast cancer had better results in humans when EGCG from green tea extract was added as an immune modulation. More research, particularly in humans is needed to fully understand the mechanism of action of EGCG.

Toxicity of green tea extract

Animal experiments showed that higher doses of green tea extract could cause toxicity in the liver and in the nose of rats and mice. I was not able to find objective evidence for green tea toxicity in the PubMed system with respect to humans.

Healing Powers Of Green Tea

Healing Powers Of Green Tea

Conclusion

Perhaps the most important discovery regarding green tea extract is as follows. It crosses easily through the blood/brain barrier into the brain. This can postpone Alzheimer’s disease and can even lead to new neuron formation. The beneficial cardiovascular effects are also useful and combine well with exercise and good nutrition for prevention. Particularly stroke prevention is a useful property of EGCG from green tea extract. The effect on obesity is marginal whereas there was no effect of green tea on prevention of diabetes. The immune modulatory effect of green tea extract is useful in the treatment of autoimmune diseases and of cancer. Existing treatments for these conditions are becoming more effective by adding green tea extract.

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Oct
19
2013

Healthy Choices Start In Your Brain

You may have seen the CNN heading “Where is self-control in the brain?”  If we want to make any healthy choices in life including sound financial choices, we need a balanced brain that makes the right decisions for us.

Researchers at the Caltech in Pasadena, CA have examined this question in detail using functional MRI scans and found out that there are two loci on the frontal lobe of the brain that control your impulses: the “ventral medial prefrontal cortex” (red in this link) that processes your initial image (like seeing a delicious ice cream cone”) and the “dorsolateral prefrontal cortex”(green in this link), where you decide that this is not healthy for you because it has too much sugar in it. The Caltech researchers found a group of volunteers who were impulsive and made the wrong choice simply based on their taste buds without consideration for their health in general. An equally large group of volunteers was also found who had functional activity in the ventral medial prefrontal cortex and the dorsolateral prefrontal cortex, the latter of which modified the final decision into the healthy choice. The impulsive group made their decision to buy simply with the activation of only the ventral medial prefrontal cortex.

The researchers think that it is this kind of lack of balanced thinking that decides whether we are going to make the right or wrong health choices for ourselves. The sad part is that ultimately, the summation of bad health decisions during life can become the cause of developing dementia, such as Alzheimer’s disease. The good news is that many of the causes of dementia can be avoided, which means that the average person could prevent dementia. I will discuss this in detail here.

Causes of dementia

It is interesting to study patients with various forms of dementia as it is often in the frontal and temporal portions of the brain where brain cells are dying off resulting in impulsive buying, impulsive behavior and lack of recent memory. It is also important to recognize that a number of conditions or factors can cause dementia:

1. Genetic causes

Here is the

There are two types of frontotemporal lobe dementias, a tau-protein positive FTD and a ubiquitin-positive FTD, which has been shown to be due to a deficiency in progranulin. Both of these genetic defects are located on chromosome 17. In Alzheimer’s dementia, which occurs later in life there can be genetic defects at chromosomes 21, 14 or 19. Epigenetic factors like exercise, avoidance of alcohol, and taking omega-3 supplements can even partially prevent or postpone the onset of dementia from genetic causes.

Healthy Choices Start In Your Brain

Healthy Choices Start In Your Brain

2. Toxins like alcohol

Another example of how people can get dementia is through the effect that regular alcohol consumption has on our brains and bodies. This image of an MRI scan shows a normal brain for comparison on the left and  the MRI scan of the brain of a chronic alcoholic on the right.  When a chronic alcoholic has severe atrophy of the brain a psychiatric condition, called Korsakoff’s syndrome can occur. This psychotic condition as a result of the brain having been poisoned by regular alcohol intoxication. Essentially the toxic effect of high daily doses of alcohol have shrunk not only the surface of the brain, but also the deeper substance of the brain. The patient is psychotic, has loss of memory and is unable to care for him/herself.

3. Vascular damage to the brain

Strokes can cause vascular dementia that leads to Alzheimer’s disease-like memory loss. This link points out that diseases like hypertension, obesity, diabetes, atrial fibrillation, ischemic heart disease and dyslipidemia all predispose you to possibly get a stroke with subsequent dementia.

4. Traumatic head injuries

In boxers, football players and combat soldiers brain cells can get lost from repetitive head trauma leading to dementia (in this case it is called “dementia pugilistica”).

5. Infectious dementia

HIV in AIDS patients can affect the brain and cause an HIV-associated dementia. Bacterial meningitis and viral meningitis can kill brain cells and cause a form of dementia as well.

6. Immune disorders

We know that MS can go on to develop dementia as a late complication. In MS there are autoantibodies against myelin, the insulation material that surrounds nerve fibers. An important category of immune disorders is autoimmune disease that can cause dementia. The cardiologist, Dr. William Davis, has presented compelling evidence that wheat allergies can cause dementia, but if detected early and treated by a gluten free diet, this clears up the mind and stops further development of dementia (Ref.1 describes wheat allergies causing dementia; a wheat free diet is described in Ref.2).

7. Hormone deficiencies

A classical example is hypothyroidism, which in the past before thyroid medicine was available, often led to dementia. A simple blood test, TSH (thyroid stimulating hormone) can detect whether or not you are hypothyroid. The A4M recommendation for a normal level is below 2 (not below 5 as often reported by official lab value reports).

8. Lack of vitamins

Thiamine (=vitamin B-1) is often missing in alcoholics. If you are missing vitamin B-6 and vitamin B-12 in your diet, this can predispose you to develop dementia as well. Aging people lose a factor from the gastric mucosa (the intrinsic factor) that is essential to absorb vitamin B-12 in the mall bowel, which predisposes them to develop pernicious anemia and dementia. A simple vitamin B-12 injection can prevent this from happening.

9. Too much sugar consumption

Sugar consumption has skyrocketed in the 1900’s and keeps on going up in the new millennium as well. Here is a review that discusses the possibility that Alzheimer’s can be triggered by overconsumption of sugar. The higher the blood sugar levels in diabetics, the higher the risk for developing Alzheimer’s disease. A study in Seattle has confirmed this. High insulin levels are found in type 2 diabetes; they are responsible for making brain cells stimulate the production of the gooey substance amyloid that causes Alzheimer’s disease. The authors of this study showed this to be true both in humans and in animal models.

10. Lifestyle issues like lack of exercise, excessive weight (obesity, being overweight) and poor diet (fast foods) play an enormous role in terms of causation of dementia in addition to the other factors mentioned. On the other hand organic foods Lack of toxins) and a Mediterranean type diet will preserve your brain cells.

Treatment of dementia

At present treatment of dementia is very limited, as we do not have a complete understanding of dementia at this point. The traditional treatment of dementia outlined here will only marginally delay further deterioration of dementia, but ultimately fail. In my opinion this is because the medical profession has been concentrating on fighting the symptoms of dementia rather than the cause.

Given the list of known causes above, I like to give you 6 recommendations that will help you to prevent Alzheimer’s disease and dementia in general.

  1. I would suggest that you cut sugar out of your diet and replace it with stevia. This also includes dates, grapes, bananas; also wheat and wheat products and starchy foods like pasta, potatoes, rice and bread (see Ref. 1 and 2 for details). The manufacturers of soda drinks, pies and cakes will not be happy about this recommendation, but it will please your brain cells. You will also be surprised how easy it is now to lose weight, which will please you (this also lowers your risk for heart attacks and strokes).
  2. Severely limit your alcohol consumption to less than 1 drink for women and 2 drinks for men per day (better still would be to stay sober) unless you want to become part of the hospital population mentioned in one of the links at the beginning of this blog.
  3. Have your hormones checked, particularly your thyroid hormones, but also estrogen and progesterone levels in women and testosterone in men. Our brain cells have hormone receptors for a reason. They need to be stimulated by our hormones, even in menopause or andropause. Replace the missing sex hormones with bioidentical hormone creams and missing thyroid hormones with thyroid tablets (Armour is the best mix of T3 and T4 thyroid hormones, not Synthroid).
  4. Prevent repetitive brain injuries before it is too late. Rethink whether you really need to box, street fight, play football, rugby or hockey.
  5. Use vitamins for prevention of dementia: The B complex vitamins like B-2, B-6, B-12 (by injection); vitamin D3 has recently been shown to be effective in slowing down Alzheimer’s disease. Vitamin D3 is low in Alzheimer’s patients and vitamin D3 supplements will slow down this disease. Although vitamin C showed equivocal results, it does have some neuroprotective qualities and decreases β-amyloid production and acetyl cholinesterase activity. A Mediterranean-type diet (Ref.2) is also helpful in preventing dementia.
  6. Exercise daily. It will discipline you to stick to the other points mentioned above. It gives you some extra endorphins and will make you feel good about yourself.

Conclusion

Although we do not yet have a complete picture regarding Alzheimer’s disease and dementias, we do know enough to reduce our risk of getting them. When you cut out wheat and wheat products, autoimmune antibodies against your brain cells will not be produced, your opiate receptors in the brain will not be seduced to eat more and more sugar, starchy foods or high fructose corn syrup, so you will have no problem in cutting out high glycemic index foods (Ref.1). This will reduce insulin and reduce IGF-1 growth factors that would have made you vulnerable to produce the gooey amyloid substance that makes you lose your memory. The orbitofrontal part of your brain (particularly the dorsolateral prefrontal cortex) will be reminding you what you read here: healthy lifestyle choices start in your brain.

References

1. William Davis, MD: “Wheat Belly. Lose the Wheat, Lose the Weight, and Find Your Path Back to Health”. HarperCollins Publishers LTD., Toronto, Canada, 2011.

2. William Davis, MD: “Wheat Belly Cookbook. 150 Recipes to Help You Lose the Wheat, Lose the Weight, and Find Your Path Back to Health”. HarperCollins Publishers LTD., Toronto, Canada, 2012.

Last edited Oct. 19, 2013