Leading cardiologists in Sweden conducted a four-year study — the KiSel-10 study — of 443 of the elderly Swedish citizens and found that a prophylactic treatment with 200 micrograms of high-selenium yeast and 200 milligrams of Coenzyme Q10 daily reduces the risk of dying from heart disease by over 50 per cent. This is an immensely interesting study result because heart disease is the number one killer in Western countries.
The KiSel-10 Study
The KiSel-10 clinical trial — a randomized, double-blind, placebo-controlled study– investigated the effect of a combination of high-selenium yeast tablets and Coenzyme Q10 capsules, as compared with matching placebo capsules and tablets, on the following outcomes:
Selenium is an essential micronutrient for us humans. It is a component of the selenoproteins that we need for antioxidant protection and for good immune system function. The selenoproteins glutathione peroxidase, thioredoxin reductase, and selenoprotein P are arguably the most important selenoproteins [Alehagen 2014].
Variability of selenium content and intakes
The soil content of selenium and, thus, the dietary intake of selenium varies considerably around the world. Consequently, the need for selenium supplementation differs from region to region of the world. Generally, selenium intakes are lower in Europe than in the United States; there is, however, also considerable variation within the United States. The safest thing to do is to get a plasma or serum selenium concentration test done.
During an almost seven-year follow-up period, elderly healthy Swedish citizens with low serum selenium concentrations had significantly increased cardiovascular mortality and total mortality rates compared to contemporaries with higher serum selenium concentrations. Specifically, there was a 56% increased risk for cardiovascular mortality and a 43% increased risk for all-cause mortality. Accordingly, the Swedish researchers suggested that selenium supplementation should be recommended to all Swedish citizens with a serum selenium concentration below 57 micrograms per liter [Alehagen 2016].
In fact, Professor Urban Alehagen and his team of researchers at Linköping University pointed out that the average serum selenium concentrations observed in the study of elderly Swedish citizens – 67.1 micrograms per liter – is not sufficient to achieve optimal function of the important selenoproteins that require selenium as a component [Alehagen 2016]:
The randomized controlled clinical trial known as the KiSel-10 study documented that daily supplementation of healthy elderly adults (men and women aged 70 – 88 years) with 200 milligrams of Coenzyme Q10 and 200 micrograms of a high-selenium yeast preparation yields significant health benefits as compared with placebo supplementation:
reduced heart disease mortality
better heart function
fewer signs of chronic low-grade inflammation
fewer signs of oxidative stress (cell damage caused by harmful free radicals)
These research findings were/are encouraging for middle-aged adults and for senior citizens, no doubt about it.
The KiSel-10 study of selenium and Coenzyme Q10 treatment
Professor Alehagen and the team of bio-medical researchers in Linköping, Sweden, knew that selenium intakes and selenium status are low in Sweden generally. They knew, moreover, that the human body’s bio-synthesis of Coenzyme Q10 declines with increasing age to the extent that, typically, an 80-year-old body produces about one half of the Coenzyme Q10 that a 25-year-old body produces.
Daily supplementation for four years with a high-selenium yeast tablet and two Coenzyme Q10 capsules reduced the risk of death from heart disease in elderly men and women aged 70-80 years at the time of enrollment into the KiSel-10 randomized controlled trial. The effective dosages were 200 micrograms of selenium and 200 milligrams of Coenzyme Q10 (100 milligrams twice a day) [Alehagen 2013].
The daily supplementation also maintained good heart function as documented on echocardiograms and reduced the concentrations of bio-markers for oxidative damage and low-grade inflammation. Best of all, the beneficial health effects of the selenium and Coenzyme Q10 persisted for up to ten years after the four-year supplementation [Alehagen 2015].
Selenium is a trace element. It exists only in rare quantities in the world. It is produced primarily as a by-product of the process of mining copper. It is not recyclable. It is very unevenly distributed in the soils of the earth.
Consequently, the availability of selenium in grasses and grains and, at the next stage of the food chain, in animals, varies considerably from region to region in the world. The human dietary intakes of selenium vary accordingly around the world.
Selenium a vital nutrient for humans Selenium is a necessary micronutrient that our bodies do not produce. We get our selenium primarily from our diets. Selenium is important for good immune system function, good thyroid function, good reproductive function, and good protection of our cells’ DNA.
In my mind, I keep coming back to the question of heart health and the role that selenium supplements play in heart health. That may surprise many of you because we tend to think of selenium supplements primarily for the prevention of cancer and for the prevention of thyroid disorders and for protection against the toxic effects of heavy metals like mercury and cadmium. We know that our immune system needs adequate intakes of selenium if it is to function optimally. That’s correct, isn’t it?
Selenium supplements and good heart health
But, what about the relationship between selenium intakes and status and heart health? Writing in the medical journal, The Lancet, Professor Margaret P. Rayman, University of Surrey, in Guildford, United Kingdom, has listed and documented the following ways that adequate selenium status and optimal levels of selenoproteins can potentially benefit the heart [Rayman 2012]:
There have been two noteworthy discoveries from a recent randomized controlled trial conducted by Dr. Urban Alehagen of Linköping University (Sweden) and his colleagues.
Firstly, people with low concentrations of selenium in their blood were found to be at significantly higher risk of death from heart disease.
Secondly, a combination of a patented high selenium yeast supplement and a proven Coenzyme Q10 supplement taken daily for four years provided significant protection against heart disease in people with low serum selenium status.
The KiSel-10 study of cardiovascular mortality
The study enrolled 668 healthy elderly individuals aged 70-80 years. The study was well-designed and well-executed. One group of 219 randomly selected individuals received 200 micrograms of selenized yeast tablets and 200 milligrams of Coenzyme Q10 capsules daily for four years. A second randomly assigned group of 222 individuals received matching placebos. The remaining group of 227 individuals received no treatment at all.
The heart muscle tissue is frequently the first tissue in humans to suffer damage caused by selenium deficiency. When the cell membranes in the heart muscle tissue are damaged by the action of harmful free radicals (this is called oxidative damage), many of the healthy heart muscle cells are replaced by fibrous tissue. The resulting condition is called cardiomyopathy.
Cardiomyopathy is a disease of the heart muscle in which the heart is enlarged, thick, and rigid [Mayo Clinic]. As the cardiomyopathy worsens, the weakened heart muscle is less and less able to pump adequate quantities of blood to carry oxygen and nutrients to the cells and tissues throughout the body. Eventually, symptoms such as shortness of breath, early fatigue, and swelling in the legs and feet and abdomen appear, the symptoms of chronic heart failure.
Statin medications: good news and bad news? On the one hand, statin medications are effective at reducing cholesterol levels, and, are good, apparently, at reducing the number of deaths from heart attacks. On the other hand, we have seen a very considerable rise in the number of cases of chronic heart failure … in the same period that statin medications have been prescribed. Drs. Okuyama and Langsjoen and their colleagues have explained the pharmacological mechanisms by which this medical paradox may be occurring [Okuyama].
Statins inhibit the body’s production of Coenzyme Q10
Okay, I was aware of the evidence from well-designed studies linking the taking of statin medications to decreased plasma levels of Coenzyme Q10. Coenzyme Q10 is an important factor in cellular energy production and is an important lipid-soluble antioxidant [Folkers, Littarru, McMurray]. And I knew that the energy-deprived heart is a failing heart [Folkers, Molyneux, Mortensen]. So, I knew that anyone taking a statin medication needs to talk to his or her cardiologist about taking a good Coenzyme Q10 supplement.