– but what about the mercury? – but what about the mercury?

Oily fish is a great source of the essential omega-3 fatty acids, EPA and DHA, which are important for the development of the brain and nervous system of the unborn child. Pregnant women with low levels of these two omega-3 fatty acids have a statistically significant increased risk of preterm delivery compared with pregnant women who have high levels of EPA and DHA in their blood. This was shown in a study from SSI in Copenhagen, carried out in collaboration with Harvard T.H. Chan School of Public Health in Boston, the United States. The problem is that many women are afraid to eat oily fish during their pregnancy because of the risk of mercury poisoning. So which fish are the safest for consumption – and what about fish oil supplements?

- and that may down to a lack of the sleep hormone melatonin

Sunlight is important for our mental health for various reasons. At northern latitudes, we are exposed to less sunlight. According to a new American study, that increases your risk of the OCD, a psychiatric disorder characterized by compulsive thoughts and behavior. The scientists point to the fact that people with OCD often have delayed 24-hour rhythm and get to bed late at night, and they theorize that these disturbances of the circadian rhythm and lack of melatonin may play a role. This presents new potential in the treatment of the disease, and morning light is part of it. Melatonin supplements may also be worth trying.

- and improve their cognition and motor skills

According to a large meta-analysis, supplementing with omega-3 fatty acids has a positive effect on children by improving their vision, their cognition, and their motor skills. Unfortunately, modern diets provide far too little omega-3. For that reason, health authorities should consider recommending supplements of purified fish oil for pregnant women and children, just like they recommend folic acid, iron, and vitamin D.

Most people thrive on the idea of staying physically active throughout life, but as we grow older, our skeletal muscle slowly vanishes and our figure changes. This is known as sarcopenia and is one of the main reasons why older people become more fragile and perhaps even disabled. Exercise and diet play a major role, and it seems that the official dietary guidelines are not optimal and should focus more on increased intake of protein as well as lysine, vitamin D, and omega-3 according to a new Canadian study. Earlier research shows that magnesium, selenium, and Q10 are also important for muscle mass and strength.

The human brain needs omega-3 fatty acids, and according to a study from the University of Massachusetts Lowell in the US, something as simple as a fish oil supplement can help reduce disruptive and violent behavior, a growing problem among children and teenagers. Pedagogical and psychological approaches are not the only solution to stressed and externalizing behavior. It is every bit as important to look at the children’s nutritional status.

- and lack of nutrients is an overlooked problem

According to the statistics, far too many patients contract an infection while being hospitalized in a Danish hospital. This has enormous human and economic costs that need to be addressed. Hospital infections are not only a consequence of poor hygiene, it actually turns out that 40 percent of the patients are malnourished to some degree, which impairs their immune system and makes them an easier target for infections. Lack of vitamin C, vitamin D, selenium, zinc, and iron seem to be the big and overlooked problem.

One in nine Danish women gets breast cancer, and the situation is not improving, on the contrary. One of the reasons why breast cancer is so widespread is that so many women lack vitamin D, and it looks as if the official recommendations for this nutrient are too low. A new American study has shown that those with higher amounts of vitamin D in the blood have a lower risk of the dreaded disease. The question is how much vitamin D do we need for optimal disease prevention, and what role does the nutrient play for those who have already been diagnosed with breast cancer?

- and that increases the need for selenium

Selenium is necessary for ensuring proper functioning of around 25 different enzymes – also known as selenoproteins – that are essential for energy turnover, metabolism, immune defense, fertility, and for antioxidant protection to help prevent cells and DNA from being damaged by oxidative stress. Selenium is also a so-called mercury antagonist that works by attaching itself to mercury, thereby preventing mercury’s harmful impact on the brain and nervous system. Once selenium has attached to mercury, however, it is no longer available to carry out all of its essential functions in the body. Because we are all exposed to mercury in some degree, this may cause a relative selenium deficiency that leaves our brain and nervous system particularly vulnerable to oxidative damage. In a new review article based on published research, Professor Nicholas V.C. Ralston and Dr. Laura J. Raymond explain why the toxic damage to the brain and nervous system is primarily a result of mercury’s inhibiting impact on the selenium metabolism. Selenium deficiencies are rather common, and mercury poisoning is an insidious problem, so the combination of these two problems deserves a lot more attention.