Jun
17
2023

Telomeres can Protect you from Premature Aging

By | lifestyle, Mortality, telomeres

Longer telomeres can protect you from premature aging, and shorter telomeres lead to premature death and various diseases. But recently new research showed that sometimes longer telomeres can be responsible for cancer and lower life expectancy. I will discuss this further below.

Some facts about telomeres

Telomeres are the caps on the chromosomes that do not contain genes, but are important for cell division. When cells divide, the DNA with all the genetic information about us replicates. With cell division each copy of our DNA ends up in a new cell, but the telomere gets shorter with every cell division. The enzyme telomerase is able to lengthen our telomeres. A healthy Mediterranean diet, regular exercise, not smoking cigarettes, sleeping 7 or 8 hours every night are all factors that stimulate elongation of our telomeres. When telomeres are short, they can no longer divide, but the cells turn into senescent cells. They no longer divide, but they stay metabolically active and are significant in the diseases of the aging. They cause osteoarthritis, hardening of the arteries and cancer.

Mice with hyper-long telomeres live much longer than control animals and they have lower LDL cholesterol levels.

Animal studies confirm that short telomeres mean shorter lifespan

There were animal studies that showed that telomeres shorten more slowly in long-lived birds and mammals.

A study looked at the telomere shortening rates of different animal species. They found that those species that had the fastest telomere shortening rate were also the ones with the shortest life span.

Shorter telomeres can also cause several chronic health conditions.

Telomerase helps to keep telomeres from shortening

An important ingredient in every body cell is the enzyme telomerase. It attaches to telomeres and adds DNA to telomeres thus elongating them. Many healthy lifestyles increase telomerase and help shortened telomeres to get longer again.

What preserves the length of your telomeres?

I have previously reviewed factors that elongate telomeres. Here is a summary of this information.

Telomere length enhancers

  1. Lifestyle changes can have positive effects on telomere length. Examples are smoking cessation, weight loss and stress reduction.
  2. Dietary changes: we know that fish oil (omega-3 fatty acids) supplements elongate telomeres as does a low-fat diet.
  3. Supplements like vitamin D3, antioxidants (vitamin C and E) and astragalus (TA-65) elongate telomeres as well.  The astragalus supplement, TA-65 showed a significant elongation of telomeres after 12 months while controls lost telomere length.
  4. Exercise: in a 24-week experiment of care workers regular aerobic exercise increased the telomeres by 67.3 base pairs.
  5. Bioidentical hormone replacement in aging people: when hormones are missing after andropause and menopause, the natural hormones need replacing, or the telomeres are shortening.
  6. High cortisol levels cause telomere shortening.
  7. Human growth hormone elongates telomeres via telomerase activation.
  8. The fasting mimicking diet (FMD) was shown to extend life and telomeres as well.

Conflicting research about longer telomeres

A publication in the New England Journal of Medicine dated May 4, 2023 showed that patients with a POT1 mutation had long telomeres.  This mutation caused cancers, brain tumors, B- and T-cell lymphomas and bone marrow cancers. The long telomeres facilitated cancer growth. Normally this type of mutation is rare and in patients without this mutation long telomeres would lead to longevity.

Dr. Joshua Berkowitz, the Medical Director of IV Boost UK, said that further research needs to focus on the following: “Identifying genetic and epigenetic factors that contribute to aging and longevity, understanding the role of the microbiome in aging and longevity, and investigating the role of senescent cells in aging and age-related diseases.”

Telomeres can Protect you from Premature Aging

Telomeres can Protect you from Premature Aging

Conclusion

Our telomeres are needed for cell division. When telomeres get shorter with age there is a consensus that this leads to a potentially dangerous situation. The cells turn into senescent cells. They no longer divide, but they stay metabolically active and are causing the diseases of the aging. These are osteoarthritis, hardening of the arteries, cancer and many more. On the other end of the spectrum with regular exercise, a Mediterranean diet and a normal weight, telomeres can get elongated, which for most people means a longer life expectancy. However, recent research showed that patients with a POT1 mutation are vulnerable to facilitating cancer growth and premature death. Fortunately, the POT1 mutation is rare. Future research will clarify what the safest way is to achieve longevity.

Jan
16
2016

Low Thyroid (Hypothyroidism)

By | Hormones, Insomnia, Obesity, Pain

Dr. Pamela Smith gave a detailed talk regarding low thyroid (hypothyroidism) at the 23rd Annual World Congress on Anti-Aging Medicine on Dec. 13, 2015 in Las Vegas. As a lack of thyroid hormones is one of the causes of premature aging, it is important to pay attention to your thyroid hormones. Here I am summarizing the highlights of this talk.

Thyroid disease, particularly low thyroid hormone levels (hypothyroidism) is very common in the population. Part of the problem is that in 72% of the world population dietary iodine is insufficient to provide adequate amounts of iodine to the body that is required for thyroid hormone production in the thyroid gland. The US Institute of Medicine has recommended 150 micrograms of iodine intake every day. Japan with its emphasis on seaweed intake, which provides iodine supplementation is one of the few countries where thyroid deficiency is extremely low (Ref.1).

But apart from dietary factors there are many other factors that can lead to insufficient amounts of circulating thyroid hormones (see below).

The production of thyroid hormones

The thyroid gland produces the thyroid hormones by adding iodine atoms into the amino acid L-tyrosine to make thyroxin (T4) and triiodothyronine (T3). T3 is the main active hormone, which is about 5-times more powerful than T4. There is a feedback cycle between thyroid hormones, the hypothalamus and the pituitary gland. Both the hypothalamus and the pituitary gland have thyroid hormone receptors that sense the level of T3 and T4 and can modify the production of these hormones. The majority of T3, which is the main active thyroid hormone, comes from conversion of T4 into T3 by a selenium-dependent enzyme.

Most of the thyroid hormones are bound in the blood by thyroid binding globulin. Only the free T3 and free T4 are metabolically active and will affect the metabolism of our body cells. The delicate balance can be easily disrupted. Oral contraceptives and sex hormone replacement therapy can increase the amount of circulating thyroid binding globulin, thus creating a thyroid hormone deficiency state, as the free T3 and free T4 are diminished.

Other factors influencing circulating thyroid hormones

Low adrenal gland hormone activity

Low adrenal gland hormone activity can occur simultaneously with hypothyroidism. On the other hand, when thyroid hormones are low by themselves, the adrenal glands often compensate by producing more cortisol to offset some of the symptoms of hypothyroidism.

Conversion of T4 to T3

An enzyme located in the liver, kidneys, pituitary gland, hypothalamus and brown fat is necessary for conversion of T4 to T3, the more active thyroid hormone. Anything that interferes with this conversion leads to hypothyroidism. Over the years medical research has identified many factors that interfere with this process. For instance, there are trace elements necessary for this enzymatic reaction, like selenium and zinc; if they are low in the diet, low T3 will be the result. But other nutrients, if missing, will also interfere with T4 to T3 conversion: iodine, iron as well as vitamins A, B2, B6 and B12.

Medication can interfere with conversion of T4 to T3

Several medications can also interfere with the conversion of T4 to T3: we already mentioned birth control pills; others are estrogen, lithium (patients with bipolar disorder are often on this), phenytoin, theophylline, beta blockers (such as propranolol), chemotherapy and clomipramine.

Too much fiber in diet can interfere with conversion of T4 to T3

But dietary factors can also lower T3 due to a lack of conversion from T4: too many cruciferous vegetables, a low carbohydrate diet, low fat diet, low protein diet, excessive alcohol use, walnuts and soy. In a study that examined the effects of soy involving 37 adults on a high soy diet over three months 50% developed hypothyroidism. When the soy diet was stopped it took one month to normalize the thyroid function (Ref. 2).

Chronic inflammation, diabetes, aging and more can lower T3

There is no end of factors that cause low T3 because of the inability to convert from T4: chronic inflammation due to cytokines, diabetes, aging, poisoning with heavy metals like mercury, lead and cadmium (cigarette smoking), fluoride, pesticides, exposure to radiation and stress. Other toxic substances that enter the body can interfere with the same T4 to T3 conversion process: dioxins, phthalates (chemicals added to plastics) and PCB. But excess calcium and copper (copper salts could come from spraying of organic fruit) can also lead to low T3.

Too much cortisol from stress can lower T3

Other hormones can disbalance the equilibrium and cause low T3 because of a lack of conversion from T4. One reason can be too much stress, which causes cortisol from the adrenal glands to rise. Surgeries cause the same stress response (high cortisol levels) also will lower T3.

Reverse T3, an inactive form of T3

There is another conversion process that has been shown to lead to lowered T3: it is called “reverse T3 (rT3)”. rT3 is an inactive form of T3, which blocks thyroid receptors and renders T3 less active. rT3 is particularly important in stressful situations and in athletes who engage in extreme exercise. In these individuals T3 and T4 blood tests are normal, TSH is suppressed and rT3 is elevated. That’s how the doctor can diagnose this condition. Other conditions that lead to high reverse T3 are: aging, diabetes, exposure to free radicals (chemotherapy or radiation in cancer treatment), fasting, prolonged illness, toxic metal exposure, inflammatory cytokines, depression and anxiety, bipolar disorder, Alzheimer’s and Parkinson’s disease, chronic fatigue syndrome and fibromyalgia.

Certain supplements and dietary habits can help to increase the conversion from T4 to T3

After all this negative news it is almost a wonder that the thyroid is still doing its work! Since we know the risk factors, it is important to be aware that certain supplements and dietary habits can help to increase the conversion from T4 to T3. Here is a list of those that help: iodine, iron, zinc, selenium, potassium, Ashwaganda, and a high protein diet. Other positive factors are vitamins A, B2 and E; growth hormone, testosterone, insulin, glucagon, melatonin and estrogen (high dose).

Symptoms of hypothyroidism

There was an overwhelming amount of information about signs and symptoms of hypothyroidism that was reviewed. I can only highlight some of the more common symptoms here. It is important to know that some of these signs and symptoms occur several years before the lab values become abnormal. This is particularly true of the “eye brow sign” and the thinning of eyebrows is a pointer to hypothyroidism!

More signs and symptoms of hypothyroidism

Depression, weight gain, constipation and migraine type headaches can be early non-specific signs of hypothyroidism. Women often present with irregular periods. Other symptoms are: decreased memory and inability to concentrate, anxiety/panic attacks, muscle and joint pains, a puffy face, swollen eyelids, decreased sexual interest, and sleep disturbance. Sparse, coarse, dry hair; missing hair confined to the outside 1/3 of both eye brows (eye brow sign) and carpal tunnel syndrome are also associated with a lack of thyroid function. Often there is also a loss of eyelashes or eyelashes that are not as thick. Blood tests can show high cholesterol, iron deficiency anemia or vitamin B12 deficiency. This should prompt the physician to order thyroid tests.

Blood tests for hypothyroidism

The doctor needs to order TSH, free T3, free T4, reverse T3 and thyroid antibodies to have a complete documentation of what is going on. In addition the doctor will order these three thyroid antibodies: antithyroglobulin antibody, antimicrosomal antibody and antithyroperoxidase (anti-TPO) antibody. There are a number of more studies that an endocrinologist would order in difficult to diagnose cases. Thyroid antibodies are an important cause of hypothyroidism in the US. They can also be due to Hashimoto’s thyroiditis, an inflammatory condition of the thyroid gland. Some people have autoimmune antibodies against adrenal gland tissue. There are also patients who have gluten sensitivity. They may produce these autoantibodies to both the adrenal glands as well as the thyroid gland.

Treatment of hypothyroidism

Treatment for hypothyroidism consists of detoxification, proper nutrition and thyroid hormone replacement.

Detoxification can include intravenous chelation therapy, if heavy metals are part of the development of hypothyroidism. In some cases detoxification is all that is necessary.

Proper nutrition with a Mediterranean diet and some iodine supplements or seaweed is important. By the time the physician diagnoses hypothyroidism, there is  damage  in the thyroid gland and the missing thyroid gland hormones have to be replaced.

Replacement of thyroid hormones

Replacement of thyroid hormones is best done by desiccated thyroid or compounded thyroid (both T3 and T4). The physician takes the normalization of the TSH level as the end point. It should be below 2.0 (not the lab normal value of below 5). Free T3 should be optimally between 3.5 and 4.3 and reverse T3 should be 50 to 150 pg/ml to be optimal.

If reverse T3 is high, the patient will have hypothyroid symptoms, even if T3 and T4 blood tests are normal. Because reverse T3 derives from T4, the physician will have to lower T4 or take the patient off T4. Replacement with T3 will lead to lower TSH production by the pituitary gland. At the same time production of T4 and inappropriate conversion to reverse T3 will decrease.

Treating concomitant factors

Depending on what other conditions the patient presents with, it likely will help to eliminate stress, treat selenium and iodine deficiency, treat infections and treat growth hormone deficiency, if present.

There were many more pearls of wisdom in this very comprehensive talk on hypothyroidism, but there is not enough room in this blog to mention all of this. For more info read Dr. Pamela Smith’s book (Ref.3).

Low Thyroid (Hypothyroidism)

Low Thyroid (Hypothyroidism)

Conclusion

The maintenance of our health and well being involves the thyroid as one of the main players. Hypothyroidism can develop for multiple reasons: inadequate iodine intake, toxins including heavy metals, autoantibodies from gluten. In addition there may be another sensitivity and side effects from certain medication usage. It is a fallacy to think that supplements, vitamins and lifestyle choices can “cure” thyroid deficiency. Once the levels are low, thyroid replacement is the only way to reestablish a hormonal balance! The treating physician must consider many factors when replacing thyroid hormones optimally. Desiccated thyroid hormone replacement (containing T3 and T4) is the best type of replacement of missing thyroid hormones. The needs can differ a great deal, as no patient is the same! For best results the treating physician needs to individualize treatment.

References

Ref. 1: Brownstein, D., “Iodine: Why You Need It, Why You Can’t Live Without It”. Medical Alternatives Press, 2004.

Ref. 2: Kelly, G., “Peripheral metabolism of thyroid hormones: A review,” Alt Med Rev 2000; 5(4):306-33.

Ref. 3: Smith, P. “What You Must Know About Thyroid Disorders”. Garden City Park, NY: Square One Publishers, 2016.

May
10
2014

The Full Story About Testosterone

By | Heart Disease, Hormones, Men's Health, Obesity, Osteoporosis, Prevention, Stroke

Much has been written about what happens when women get into menopause. This begs the question: do men experience a change of life? As a matter of fact, they do. It is called “andropause”, and they can experience problems as a result. Here is a study from the Massachusetts General Hospital in Boston, MA, which was published in the New England Journal of Medicine (Sept. 2013) describing in detail what happens when men get into andropause (the male equivalent of the menopause).

We know from other studies that in obese men testosterone is converted into estrogen because of the enzyme aromatase that converts testosterone into estrogen resulting in erectile dysfunction and loss of sex drive. In lean men above the age of 55 there is a true testosterone reduction because the testicles produce less testosterone. This results in less sex drive, moodiness and lack of energy. But these men will do well with bioidentical testosterone replacement.

Main findings of the Massachusetts General Hospital study:

  1. Testosterone was responsible for thigh muscle development and leg press strength, for erectile function and sexual desire.
  2. Surprisingly, estradiol (the main estrogen component in both sexes) plays a significant part in sexual desire in the male. This became particularly apparent in the post-andropause male who desired hormone replacement. When bioidentical testosterone is used to replace what’s missing there was no problem with sexual desire or erectile function as a small amount of the testosterone was aromatized into estradiol. The researchers were able to measure both testosterone and estradiol levels.
  3. Here is a surprising fact: a lack of estrogen leads to abdominal obesity. This could also be verified by hormone measurements.
  4. In the past doctors used synthetic testosterone products like methyltestosterone, danazol, oxandrolone, testosterone propionate, testosterone cypionate or testosterone enanthate. The problem with these synthetic testosterone products is that the body cannot metabolize a portion of them into estrogen that is desirable for a normal sex drive, so the testosterone compounds alone are not doing their job as well as the bioidentical testosterone that the body can aromatize.

In obese men the problem is that there is too much estrogen in the system, which leads to a disbalance of the hormones in the male with a relative lack of testosterone. Overweight and obese men produce significant amounts of estrogen through aromatase located in the fatty tissue. Aromatase converts testosterone and other male type hormones, called androgens, into estrogen. Excessive levels of estrogen cause breast growth, muscle weakness, lead to abdominal fat accumulation, heart disease and strokes. Dr. Lee described what happens in men who enter andropause years ago as indicated under this link.

The Full Story About Testosterone

The Full Story About Testosterone

Testosterone to estrogen ratio:

Dr. Lee indicated that in his opinion saliva hormone testing is more reliable than blood tests (Ref. 1). One of the advantages of doing saliva hormone tests of estrogen and testosterone is that you can calculate directly the ratios of these two hormones. In hormonally normal younger males the testosterone to estrogen ratio is larger than 20 – 40 (Ref.2). The testosterone to estrogen ratio in obese men is typically less than 20 meaning it is too low. But lean men in andropause produce too little testosterone and their testosterone to estrogen ratio is also less than 20, because they may still have enough estrogen in their system from aromatase in the fatty tissue, but they are lacking testosterone due to a lack of its production in the testicles (Ref. 1 and 2).

When a man in andropause is given bioidentical hormone replacement with a testosterone gel or bioidentical testosterone cream this is absorbed into the blood and body tissues and then partially metabolized into a small amount of estrogen. This can be seen when saliva hormone tests are done; a higher level of testosterone is detected and much lower estrogen level so that the testosterone to estrogen ratio is now 20 to 40 or higher and the affected person will no longer be the “grumpy old man” that had been a source of distress to his partner before.

This New England Journal of Medicine study is important because it confirmed what anti-aging physicians had been saying for years: a small amount of estrogen is necessary for the male for bone health as estrogen receptors will regulate the bone density, it also helps for a normal sex drive. The same is true for women: a small amount of the opposite hormone (testosterone) will help a woman’s sex drive, but she needs the right mix of progesterone to estrogen (a progesterone to estrogen ratio of 200:1 using saliva tests) to feel perfectly normal as a women.

Health and well-being of a man depend on normal testosterone levels:

It is important to realize that testosterone is not only supporting a man’s sex drive and libido, key organs like the heart, the brain and blood vessels contain testosterone receptors as well. The body of a man was designed to respond to testosterone all along. It is when testosterone production is no longer keeping up that premature aging becomes apparent, as the target organs do no longer receive the proper signals.

A healthy heart in a man depends on regular exercise and testosterone stimulation whether he is young, middle aged or old. The same is true for the lining of the arteries where testosterone receptors are present to help with the normal adjustment to exercise and relaxation. The brain cells have receptors for all of the sex hormones and in a man they are used to higher levels of testosterone and lower levels of progesterone and estrogen. If you take the balance away, the aging man will feel miserable and grumpy. Depression will set in. Here is a brief review how one man’s life has been changed by testosterone replacement.

So, bioidentical hormone replacement is not just a matter of replacing one hormone, you need to pay attention to all of the hormones. Lifestyle issues enter the equation as well. I have reviewed the issue of bioidentical hormone replacement for women and men in this blog.

Conclusion:

When a man reaches the age of 55 or older there comes a point where a lack of testosterone and estrogen sets in. It is wise to start doing intermittent blood or saliva hormone tests before this point is reached in order to gage when bioidentical hormone replacement treatment should be given. Along with an assessment regarding the hormone status it would be wise to also assess lifestyle issues as often other factors play a role in premature aging. I have reviewed these factors systematically in a recent publication (Ref. 3). It is best to combine bioidentical hormone replacement with life style interventions to achieve optimal preservation of a man’s health.

More information about male menopause (=andropause): http://nethealthbook.com/hormones/hypogonadism/secondary-hypogonadism/male-menopause/

References:

  1. John R. Lee, MD: “Hormone Balance for men- what your doctor may not tell you about prostate health and natural hormone supplementation”. 2003 by Hormones Etc.
  2. George Gillson, MD, PhD, Tracy Marsden, BSc Pharm: “You’ve Hit Menopause. Now What?” 2004 Rocky Mountain Analytical Corp. Chapter 9: Male Hormone Balance (p.118-148).
  3. Dr.Schilling’s book, March 2014, Amazon.com:“A Survivor’s Guide To Successful Aging: With recipes for 1 week provided by Christina Schilling”.

Last edited Nov. 8, 2014

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