Lack of sleep is common among children and adults. It increases the risk of overweight, diabetes, cardiovascular diseases, blood clots, depression, infections, and a number of other diseases. Lack of vitamin D is also common, but a team of Chinese scientists have revealed that there is a link between having too little vitamin D and not being able to sleep properly and waking up feeling refreshed.

Sleep removes toxic waste products from the brain and lack of deep sleep increases the risk of poor well-being, depression, Alzheimer’s disease, cancer, and a host of other diseases. According to the American sleep researcher, Dr. Stasha Gominak, poor sleep quality is often linked to vitamin D deficiency. First of all, we need vitamin D to synthesize acetylcholine, a neurotransmitter that is necessary for reaching the deep sleep stage. Secondly, certain gut bacteria need vitamin D in order to produce vitamin B5 and other B vitamins that are necessary for proper sleep. On the other hand, taking high-dosed supplements with vitamin B5 and B12 may in some cases make it difficult to fall asleep. A healthy sleep pattern requires both vitamin D and B vitamins in the exact right amounts.

Vitamin D is essential for muscle function and normal muscle size, according to a new study that is carried out by scientists at Westmead Institute for Medical Research in Sidney. Lack of vitamin D may result in impaired muscle function, including such problems as poor physical fitness level, muscle tension and loss of muscle mass.

It is commonly known that vitamin D plays a vital role for our bones and immune system, and there is even evidence that vitamin D also plays a role in the functioning of our lungs, heart, and muscles. According to a new study, blood levels of vitamin D are determining for how well we utilize our oxygen, and that affects our training capacity and lifespan. The study is published in European Journal of Preventive Cardiology.

Vitamin D-deficient patients are twice as likely to sustain life-threatening complications in the wake of a COVID-19 infection, according to a study from Northwestern University in the United States, where scientists collected data from 10 different countries. It is worth making a note of the fact that vitamin D deficiencies are particularly common among older people of color, nursing home residents, overweight people, and chronically ill individuals, all of which are well-known risk groups. In the future fight against COVID-19 and other epidemics, good hygiene, hand sanitizer, isolation, and delayed vaccines are not enough. We must take the right measures to regulate our immune system with vitamin D, which can determine whether we reject the virus, contract a mild infection, or die of the subsequent, life-threatening cytokine storm and organ failure.

Promising results have been seen with the use of vitamin D supplements in the treatment of inflammatory bowel diseases such as ulcerous colitis and Crohn’s disease. However, there is missing information about blood levels of vitamin D and the prognosis for these patients. A new study that is published in International Journal of Surgery reveals that blood levels of vitamin D are directly linked to the risk of surgical removal of morbid intestinal tissue.

According to a new study, supplementing with large doses of vitamin D may lower blood levels of estrogen, which may be vital for the prevention and treatment of the dreaded disease.

Ever since the COVID-19 pandemic started, scientists have focused on vitamin D. This nutrient strengthens and regulates the immune defense in a number of different ways. Numerous studies have shown that lack of vitamin D increases the risk of being infected with COVID-19 and running into complications. High-dosed vitamin D supplementation of COVID-19 patients can lower their risk of being admitted to the intensive care unit and dying of the disease, according to a new meta-analysis that is published in Nutrients.

Millions of people worldwide drink arsenic-polluted water regularly. Arsenic is a toxin that is known to cause different types of cancer, including skin cancer. According to a new study published in American Journal of Cancer Research, it looks as if the active form of vitamin D, calcitriol, can prevent the onset of arsenic-induced skin cancer in a special type of skin cells. Calcitriol also appears to be able to prevent other types of cancer caused by arsenic.

– and many people are deficient of the nutrient

Overweight is a growing problem, bringing in its wake problems like type 2 diabetes that is spreading like a bushfire. Many people lead a hopeless battle against overweight, unaware that it is their insulin resistance that gets in the way. This is when cells have difficulty with absorbing sugar from the bloodstream. Now, a new Brazilian study has demonstrated that vitamin Dincreases insulin sensitivity, thereby lowering the risk of overweight and type 2 diabetes. Still, according to existing science, it is not possible to get enough vitamin D without sufficient exposure to sunlight. At our latitude, it is necessary to take a vitamin D supplement throughout the entire winter period.

- but the official recommendations are too low

According to an American study, individuals with higher blood levels of vitamin D are far less likely to develop type 2 diabetes and metabolic syndrome, the early stage of the disease, which is characterized by insulin resistance, hypertension, and elevated cholesterol levels. Because it takes many years for type 2 diabetes to develop, it is essential to have sufficiently high vitamin D levels from the early years in life. Both the new American study and earlier research point to the fact that it is not possible to obtain high blood levels of the nutrient without getting plenty of sun during the summer period and taking a high-dosed vitamin D supplement in the winter.

Melanoma can be very dangerous if it is not treated in time, but a study from the University of Leeds in England shows that vitamin D affects melanoma cells and makes them less aggressive. According to the scientists behind the study, this revelation may lead to new therapies. It is a problem, however, that health authorities warn people against sun exposure without informing about alternative ways to optimize vitamin D levels. The sun during the summer period is our main source of vitamin D, so we just have to make sure not to get burned. At our latitudes, it is a good idea to take a vitamin D supplement during the winter period. According to other studies, the nutrient prevents cancer by way of several different mechanisms.

Colorectal cancer is one of the most common cancer forms in Denmark, which is why prevention is so important. According to a new American study that is published in Gastroenterology, increased intake of vitamin Dappears to protect against bowel cancer, especially in people younger than 50 years. It even looks as if vitamin D may prevent intestinal polyps that can turn into cancer in some cases. The scientists say that higher intake of vitamin D may be relevant for prevention and may also serve as an inexpensive supplement to screening tests that are merely used for early diagnosis.

- and deficiencies increase your risk of anxiety, depression, dementia, Alzheimer’s disease, autism, schizophrenia, and other neurological diseases

Psychological disorders represent society’s single largest disease burden, and an increasing number of people are affected by it. There can be a variety of causes, and lack of vitamin D appears to be an alarming risk factor. This is because vitamin D is involved in a host of different functions that are relevant for brain neurons, including signaling substances and the brain’s reward system that affects our mood. Vitamin D also helps protect the brain against toxins, atherosclerosis, and inflammation, according to a review article that is published in the science journal Cureus. But there are questions that need to be answered. How much vitamin D do we need? Can we get enough from sun exposure? Is there enough vitamin D in a regular vitamin pill? Why do children, seniors, pregnant women, overweight individuals, and dark-skinned people have an increased need for vitamin D? And which mineral is extremely important for the body’s ability to utilize vitamin D?

- are you getting enough, though?

Studies that have been published over the past decades reveal how vitamin D plays an important role in cancer prevention. Studies also show that most of us lack vitamin D. Nonetheless, vitamin D supplements can make a difference, and research suggests that we need more than the official recommendations.

It is hardly a coincidence that so many of us contract virus infections in the course of the winter. It is because we lack vitamin D, which we are unable to synthesize when the sun sits too low in the sky. Danish scientists have discovered how vitamin D activates the immune system, and a comprehensive meta-analysis shows how vitamin D supplements can prevent colds, flus, and related complications.

Vitamin D is important for calcium uptake and bone health. According to a placebo-controlled follow-up study published in the American Journal of Clinical Nutrition, children whose mothers supplemented with vitamin D during their pregnancy continue to have stronger bones, even at the age of seven years.
The pregnant women in the study took 25 micrograms of vitamin D, which is more than twice the officially recommended intake. It is generally important for the child’s health that its mother has optimal vitamin D levels in the blood during pregnancy and while breastfeeding.

Photodynamic therapy is a kind of light therapy that is used to treat skin cancer, psoriasis, and other skin diseases. According to a review article published in Nutrients, vitamin D supplementation can improve the outcome of the treatment. In fact, vitamin D appears to have several positive effects on skin health. Taken in large doses, the vitamin can even repair skin damage caused by sunburns.

Benign paroxysmal positional vertigo (BPPV) impairs many people’s quality of life and ability to work. The dizzy spells typically occur when they shift position. According to a study from Korea which is published in Neurology, supplementing with vitamin D and calcium may lower the risk of recurring spells of dizziness. It is important to balance your calcium intake with magnesium.

Many critically ill patients lack vitamin D to an extent that can be life-threatening. This also goes for patients hospitalized with COVID-19. A large meta-analysis concludes that supplementation with vitamin D can lower all-cause mortality and reduce the duration of patients’ stay in intensive care. In the meta-analysis, the researchers look at the mechanisms that enable vitamin D to regulate inflammation and oxidative stress, which can lead to organ failure in critically ill patients.

Lack of vitamin D is a global health problem. The same is the case with overweight and hypertension, a combination that results in millions of deaths. Apparently, supplementing with vitamin D can lower blood pressure in people who are overweight, according to a study that is published in Journal of Endrocrine Society. It is important to be aware of the interactions between vitamin D, calcium, and magnesium.

Lack of vitamin D is a global health problem that increases mortality rates. At this point, many studies have shown that having adequate amounts of vitamin D in the blood can lower your risk of cardiovascular disease, which is the leading cause of death. In a new review article that is published in Nutrients, the authors look closer at vitamin D supplementation to see if it can prevent stroke and speed up rehabilitation. It is essential that vitamin D supplements have good bioavailability so they can optimize blood levels of the nutrient.

PMS (premenstrual syndrome) is quite common among women of childbearing age and can easily make their lives miserable for years, causing both physical and mental discomfort several days a month. A possible cause can be lack of vitamin D, and it looks as if high-dosed supplementation with the nutrient can relieve PMS by controlling inflammation markers and influencing the body’s antioxidant capacity. This was shown in an Iranian study that is published in Scientific Reports. It is worth noting that we need magnesium to activate vitamin D in order for the body to be able to use it optimally.

- and the nutrient also has anti-cancer properties

Cancer patients, who take high-dosed vitamin D supplements for at least three years may live longer, according to a study from Michigan State University, USA. It is not enough to treat cancer with surgery, chemotherapy and radiation. You also have to optimize the body’s vitamin D status. It is a problem that vitamin D deficiency is so common because it helps long-term prevention if you have adequate levels of the nutrient in your blood. The question is how much do we need, and is the sun sufficiently powerful to enable us to synthesize vitamin D in our skin during the winter period?

Cancer patients often have overwhelming pain that turns up as their disease progresses. The whole purpose with palliative care is to relieve the pain, and opioids such as morphine are often used for this purpose. However, according to a Swedish study published in the science journal Cancer, more and more terminal cancer patients who are given high-dosed supplements of vitamin Dhave less need for pain treatment and generally feel less tired. Vitamin D deficiencies are common among cancer patients and may contribute to a shorter life expectancy.

In May 2017, new data linking vitamin D and fertility was presented at the European Congress of Endocrinology (ECE) in Lisbon. The new findings contribute to our understanding of vitamin D’s impact on male testosterone levels and of our knowledge about whether vitamin D supplements may actually improve fertility in both sexes. Involuntary infertility, a widespread problem, may be a result of many factors, but if the reason is a vitamin D deficiency, it is easy to treat with increased exposure to sunlight and the use of supplements to keep vitamin D levels optimal all year round.

The number of older people is increasing rapidly, which means more and more people suffer from different types of dementia. Vitamin D supplementation may help prevent dementia or delay its progression, according to a population study that is published in Alzheimer’s & Dementia: Diagnosis, Assessment & Disease Monitoring. It is important to have optimal blood levels of the nutrient throughout life, simply because it often takes years for dementia to develop, and because vitamin D has many different functions that are relevant for brain health.

Tuberculosis (or TB) is one of most widespread diseases in the world. It claims millions of human lives every year, especially in underdeveloped countries. A team of scientists from Queen Mary University in London has discovered that vitamin D supplements can support therapies used in the treatment of multi-resistant TB, which can otherwise last quite a long time and comes at a considerable cost. Earlier studies have shown that vitamin D generally helps prevent the disease by supporting the immune system in different ways.

- plus large cuts in public healthcare

Lack of vitamin D is rather common. It increases the risk of infections and a host of serious diseases. German cancer researchers have estimated that if all Germans from 50 years and older took a daily vitamin D supplement it would prevent 30,000 cancer-related deaths annually and gain over 300,000 years of life. In addition to that, it would lead to huge reductions in public healthcare. The health-related and financial benefits of optimizing the population’s vitamin D status fits in nicely with previous research and calculations from Denmark.

Even at very high intake levels, vitamin D does not appear to cause toxicity, an American study reveals.

Some experts have warned people against taking vitamin D in doses that exceed the recommended daily allowance (RDA), claiming that excess vitamin D may lead to problems such as hypercalcemia, a condition characterized by elevated blood calcium levels that may cause weakness, kidney stones, and brain and heart disturbances. However, a study conducted by Mayo Clinic researchers has shown that vitamin D toxicity is not really an issue. The team of scientists analyzed blood data collected in the period 2002-2011 from patients in the Rochester Epidemiology Project and made some interesting observations.

Epidemiological studies have led to different results when it comes to vitamin D and its ability to protect against cancer, infections, and various diseases. However, according to a new study published in Cancer Research, this is because magnesium is involved in the activation of vitamin D, on which all cells depend. It therefore does no good to take supplements of vitamin D, if you lack magnesium. And this is exactly the case with many people who eat unhealthy diets, are stressed, use medicine etc.

Sclerosis, rheumatoid arthritis, certain gastrointestinal infections, and a host of other diseases are so-called autoimmune diseases that occur as a result of the immune defense overreacting and attacking the body’s own tissues. Scientists from the University of Edinburgh in Scotland have now mapped out exactly how vitamin D regulates the immune system. In fact, vitamin D may have a positive effect on autoimmune diseases such as sclerosis. But at our latitude, this provides that we get enough vitamin D from the sun in the summertime and take vitamin D supplements in the winter period. Besides, it is a problem that being overweight both increases the risk of vitamin D deficiency and sclerosis, while lack of magnesium makes it difficult for the body to activate vitamin D.

Many of us contract respiratory infections during the winter period. In many cases, the underlying cause is a deficiency of vitamin D, a key nutrient for immune health. Vitamin D also regulates the body’s inflammatory response, thereby preventing it from getting out of hand and becoming complicated or life-threatening. In a new review article, researchers looked at vitamin D’s role in preventing and fighting acute respiratory infections such as COVID-19 and influenza with particular focus on children and youngsters. The scientists point out that many people need to take higher doses of vitamin D to optimize levels of the nutrient in their blood.

Vitamin D plays a major role in our health. The main focus, however, is on vitamin D’s importance for bones, while many health professionals are totally unaware of the nutrient’s other essential functions. According to a review article published in Nutrients, half the global population has low vitamin D levels in the blood, which increases the risk of cardiovascular disease, hypertension, cancer, type 2 diabetes, Alzheimer’s disease, respiratory infections like COVID-19, and early death. The authors also mention that vitamin D science is often inadequate or misleading because studies focus on supplementation rather than looking at blood levels of 25(OH)D. Consequently, trials are often made with far too small vitamin D doses or with too a short a trial period. In either case, blood levels of vitamin D fail to reach their optimum. What is more, levels of 25(OH)D in the blood should ideally be above 75 nmol/L in order to protect against cardiovascular disease, cancer, and early death. Because this threshold level is higher than the official threshold levels, the scientists recommend high-dosed vitamin D levels as a way to reach an optimal nutrient status.

There is a link between vitamin D deficiency and sclerosis. However, only few studies show whether vitamin D supplements can stop further progression of the disease. A new placebo-controlled study of rats with advanced sclerosis has looked closer at the connection. The study, which is published in Nutrients, shows that vitamin D supplementation counteracts oxidative stress, chronic inflammation, and other processes that are involved in the neurological damage seen with this disease. It is important that vitamin D supplementation aims at optimizing blood levels of the nutrient, which requires higher doses than officially recommended. It also requires enough magnesium to help activate vitamin D and support the nervous system.

Vitamin D is involved in the development of the brain structure and in brain functions. According to a review article that is published in Nutrients, vitamin D is of particularly great importance to the mental health of children and teenagers due to its long-term effect. This subject is highly topical as it is known that the widespread lack of vitamin D among children increases their risk of anxiety, depression, aggressive behavior, and other mental problems. It is vital for children and teenagers to get plenty of sun and supplements if necessary so they are sure to meet the new guidelines for vitamin D.

COPD, a lung disease that is primarily a result of smoking, is one of the leading causes of death. Asthma, however, may also become life-threatening if it is left untreated. According to a meta-analysis published in Journal of Global Health, vitamin D supplementation may improve lung function in both diseases. The authors look at how vitamin D strengthens the immune defense and controls inflammation.

Multiple studies have shown that vitamin D plays a key role in gut health by supporting the protective mucosa, the massive gut flora, the intestinal immune defense, and the regulation of inflammatory processes. According to a new review article published in Nutrients, lack of vitamin D, which is quite common, may therefore result in an increased risk of irritable bowel syndrome (IBS) and inflammatory bowel disease (IBD), which more and more people are affected by.

Most cells in the body have receptors for vitamin D, a nutrient that works as a steroid hormone. The different immune cells in the body are particularly dependent on vitamin D. Not only is this important for our ability to fight infections, but it also helps the body regulate inflammatory processes, which are the common thread in most chronic diseases and in ageing, according to a study that is published in Nutrients. The authors, Professor Carten Carlberg and Dr. Eunike Velleur, two of the world’s leading experts on vitamin D, explain why we need much more vitamin D than officially recommended when it comes fighting age.

- which vitamin D2 does not have

Vitamin D2 occurs naturally in foods from the plant kingdom while vitamin D3 comes from animal sources. It is also vitamin D3 that we synthesize in our skin in response to sun exposure. Scientists from the Universities of Surrey and Brighton in Great Britain have now discovered that the two types of vitamin D have entirely different effects. They therefore sow doubts about vitamin D2’s role in human health, whereas vitamin D3 is known for its vital role in helping the immune system in its fight against infections such as COVID-19. Most cells in the body have vitamin D receptors, and the nutrient is also important for cancer prevention, the nervous system, our mood, and a number of other functions. Vitamin D3 from food, supplements, or sunshine must be activated in the body before it can be utilized.

Lack of vitamin D is linked to an increased risk of virus infections, respiratory diseases, cardiovascular diseases, dementia, cancer, and osteoporosis. However, the official recommendations for vitamin D intake are way too low, according to two new studies that were presented at the American Heart Association’s Scientific Sessions in Philadelphia in 2023. In addition, a German study of athletes has shown that it is better to take individually tailored vitamin D supplements to optimize blood levels of the nutrient instead of using a “one-size-fits-all” solution.

Vitamin D is important for our immune defense, mood, blood sugar, cardiovascular system, bone health, and health in general. However, the form of vitamin D that we synthesize in our skin and from supplements is passive and must be converted. First, the liver converts it into the form of vitamin D that is measured in blood tests. Afterwards, the vitamin is converted into the active steroid form that most cells and organs need. This conversion is not possible without magnesium, zinc, and vitamin K. Therefore, plenty of sun exposure or vitamin D supplementation is no guarantee of having enough vitamin D in the blood or being able to utilize the nutrient. You need the other nutrients, as well, according to a review article published in Nutrients.

Around one billion people worldwide are believed to lack vitamin D. This gives cause for concern when it comes to public health, also with regard to pregnant women and their children. Several studies link vitamin D deficiency to a number of different pregnancy-related complications such as preeclampsia, increased risk of preterm delivery, and the need for a Caesarean section. There is also a risk of low birth weight, weak bones, and later development of bronchitis, asthma, type 1 diabetes, sclerosis, and autism, according to a review article published in Nutrients. The authors believe it is necessary to give supplements to help correct vitamin D deficiencies in the expecting mothers and even in the children after birth to prevent many of the diseases and complications linked to low vitamin D status.

According to WHO, chronic inflammation is the leading cause of death worldwide. Although it is not something that can be felt as such, chronic inflammation sets the stage for a host of different diseases. In a new review article that is published in StatPearls, the authors look closer at why chronic inflammation is so dangerous and how a healthier lifestyle with vitamin D, selenium, magnesium, zinc, and fish oil can help fight the inflammation and prevent the many different diseases and early death that follow in its wake.

- and why are deficiencies so common?

Magnesium plays a vital role in the body’s calcium distribution and is involved in over 300 enzyme processes that are relevant for our bones, circulatory system, muscles, nervous system, blood pressure, blood sugar levels, immune system, and utilization of vitamin D. For that reason, too little magnesium increases your risk of osteoporosis, diabetes, cardiovascular disease, migraine headaches, infections, PMS, plus anxiety and other neurological disorders. This is highlighted in a review article published by Medical News Today. It is therefore important to be aware of all the overlooked factors that may cause a magnesium deficiency.

The summer sun is our primary source of vitamin D, and previous population studies have suggested that vitamin D may help prevent breast cancer from developing. Danish scientists have looked closer at this relation and found that women from 50 years of age and older who spend a lot of time outdoors – especially between 10 am and 3 pm – have a lower risk of breast cancer. This is important knowledge because it takes years for breast cancer to develop. Vitamin D appears to have a number of different anti-cancer mechanisms, which is why it is vital for us humans to get plenty of the nutrient throughout life.

- and throughout life

Vitamin D is important for a strong immune defense, healthy bones and cardiovascular system, cancer prevention, and for the support of many other essential body functions. However, it is not enough to follow the official guidelines for intake levels or to rely on blood tests. According to Carsten Carlberg, a professor at the University of Eastern Finland (UEF), the explanation lies in the fact that we humans respond widely different to vitamin D, so the optimal vitamin D dose varies from one individual to another. Based on years of research, Carsten Carlberg therefore advises all adults living at northern latitudes to take 100 micrograms of vitamin D daily throughout the winter period, just to be safe. Earlier studies indicate that the official recommendations for vitamin D are based on a miscalculation that has had fatal consequences for public health.

A cold is a common and contagious virus that normally lasts around a week. If a person has poor resistance, however, complications such as sinus infections, ear infections, and pneumonia may follow. Colds cause a substantial number of sick days and represent a huge socioeconomic burden to society, but zinc supplementation seems to be able to reduce the number of sick days. Just remember to get enough vitamin D also because of interactions between the two nutrients.

Zinc is of vital importance to the immune defense, our mental balance, fertility, skin, hair, sense of taste, and numerous other functions. According to a new study that is published in Current Research in Physiology, zincinteracts closely with vitamin D and is important for our cells’ ability to absorb vitamin D. Conversely, vitamin D supports the uptake of zinc in the intestines and supports various zinc-dependent cell functions. According to the new study, lack of one or both nutrients can result in a host of different problems such as infections, poor wound healing, muscle diseases, cardiovascular disease, neurological disorders, osteoporosis, cancer, and many other diseases. This is a problem because zinc and vitamin D deficiencies are rather common – mainly because of unhealthy eating habits, lack of sunlight, ageing, overweight, and the use of certain types of medicine.