Since December of 2021, two large meta-analyses have revealed that having low levels of vitamin D in your blood increases the risk of COVID-19 infections, severe disease, admission to intensive care, and death. A third meta-analysis has shown that only 12 percent of COVID-19 patients who took supplements of vitamin D were admitted to intensive care, compared to 26 percent of the non-supplemented. Finally, a fourth meta-analysis shows that supplementation with vitamin D significantly lowers the risk of life-threatening COVID-19 infections. This is particularly relevant during the winter period and among people at risk of being vitamin D-deficient, including groups such as seniors, people with dark skin, overweight people, and the chronically ill. There is an alarming need for increased focus on vitamin D supplements to prevent and treat COVID-19 and other virus infections by optimizing blood levels of the nutrient. It is also important to get plenty of magnesium, a nutrient the body needs to activate vitamin D.

Apparently so. According to a new study published in the journal Alzheimer’s and Dementia, older people who take a daily multivitamin supplement for several years are far less likely to develop dementia, Alzheimer’s disease, and other types of cognitive decline. The new study supports earlier research where it has been seen that the different vitamins and minerals increase cerebral blood flow and protect neurons. It pays off to choose high-quality supplements to make sure that the nutrients are properly absorbed in the body.

It is commonly known that zinc boosts the immune defense, although there has been some uncertainty about how. A team of scientists from Fred Hutchinson Cancer Research Center in the United States therefore decided to look closer at the subject and they found that zinc is important for T cell activity and for the thymus that produces the T cells. The scientists say that this new insight may be useful for the development of new therapies for patients with compromised immune systems. Apparently, zinc deficiencies are rather widespread and this increases the risk of infections where T cells play a key role in supporting the immune function.

Atopic dermatitis (eczema) is a widespread problem and a huge burden to both the child and its parents. According to a new study that is published in British Journal of Dermatology, high-dosed vitamin D supplementation of the mother during her pregnancy lowers the child’s risk of developing eczema within its first year of life. The pregnant women in the study got 25 micrograms of vitamin D daily, which is more than twice the amount that is currently recommended to expecting mothers. Health authorities already recommend all-year vitamin D supplementation to children up to the age of four years, so it appears that this measure can offer additional protection against eczema.

Magnesium supports hundreds of different enzyme processes that are involved in energy turnover, sugar metabolism, nerves, and several other basic functions. Unfortunately, magnesium deficiency is rather common and more and more studies suggest that this may be related to a host of metabolic disturbances such as overweight, insulin resistance, type 2 diabetes, hypertension, elevated cholesterol, and chronic low-grade inflammation that is seen in connection with most chronic diseases. On the other and, it appears that high intake of magnesium from the diet or from supplements may help. In a new review article that is published in Nutrients, the authors look at magnesium deficiency and its role in the development of metabolic disorders. They also look at factors such as nutrient-depleted farmland, unhealthy diets, poor nutrient uptake, insulin resistance, the use of medicine, alcohol abuse, and stress that can potentially result in a magnesium deficiency.

Folic acid is of vital importance to fetal development which is why pregnant women have a much higher need for this nutrient. Although the Danish health authorities recommend that pregnant take folic acid supplements, some get started too late and others forget to take their supplements. In other countries, it is common practice to enrich flour with folic acid but apparently, the added quantity is insufficient. According to a new British study, many pregnant women still don’t get enough folic acid, which increases their risk of giving birth to a baby with neural tube defects that can lead to severe disabilities. Lack of folic acid can also affect the child’s mental development. The British researchers therefore recommend adding more folic acid to fluor as a way of preventing the birth defects. It’s simple and inexpensive and would also be relevant for Denmark.

Several studies have shown a direct link between depression and lack of vitamin D, both of which are common problems. Vitamin D has numerous functions in the brain and nervous system and it helps counteract local inflammation that is often seen in connection with depression. According to a new Finish meta-analysis, high-dosed vitamin D supplementation can even ameliorate symptoms of depression. The question is how to optimize blood levels of the nutrient in order to prevent the disease.

Air pollution is a serious health threat that affects the entire world. Previous studies show that it increases the risk of cardiovascular disease, among other things. We need new strategies for protection, and a recent Chinese study conveniently reveals that supplementation with vitamin C can protect the cardiovascular system against oxidative stress and other harmful impacts from air pollution. What we need to find out is how much vitamin C it takes to obtain a therapeutic effect.

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.