We all hope to remain mentally alert throughout life, to be able to manage on our own, and to avoid diseases such as dementia. The diet plays a major role, and blood levels of various B vitamins, vitamin D, omega-3 fatty acids and certain other nutrients are linked directly to brain activity and cognitive functions. This was demonstrated in a new study of elderly people, which is published in the science journal Neurolmage. At the same time, other studies show that there is widespread lack of these nutrients due to poor dietary habits, the use of pharmaceutical drugs, and lack of sunshine. This may have consequences for both public health and health care expenditure, unless one installs timely prevention by providing the brain with vitamins, essential fatty acids and all the other things on which it depends.

Premature infants have a higher risk of development disturbances. On a global scale, preterm delivery is the leading cause of death among children younger than five years of age. Pregnant women, who increase their intake of omega-3 fatty acids by taking supplements of fish oil, are able to lower their risk of preterm delivery, according to a new Cochrane review article. Earlier studies show that increased intake of oily fish can also lower the risk of preterm delivery, but it is important that the expecting mother avoids eating predatory fish such as tuna and other types of fish that are likely to contain too much mercury.

Infertility affects around one in seven couples. WHO considers it a global health problem. One of the leading causes is impaired semen quality, and Danish, Norwegian, and German men have lower sperm quality than any other male populations. Impaired sperm quality may be a result of an unhealthy lifestyle with stress, tobacco, stimulants, and hormone-disrupting compounds. On the other hand, scientists from Mexico have found that supplements of zinc, selenium, Q10, and omega-3 have an effect on the number of sperm cells and their quality. Other studies show that zinc and selenium protect sperm cells and are important for testosterone levels.

Colon polyps are rather common, and there is a specific type of polyps that increases the risk of colon cancer, which is also a widespread problem. According to a new clinical study from the University of Leeds in England, a concentrated form of the omega-3 fatty acid, EPA, which is found in oily fish and fish oil supplements, helps reduce the number of colon polyps. The same is the case with aspirin. The two preparations work differently, however, depending on where in the colon the polyps are found, and aspirin may have long-term side effects. Earlier research has shown that supplements of selenium and antioxidants have a preventive effect, which appears to be even greater.

A higher intake of vitamin C is essential for people with insulin resistance and metabolic syndrome, both of which are early stages of type 2 diabetes. The reason for this, according to scientists from Oregon State University in the United States, is that vitamin C is a powerful antioxidant that helps protect against the damage that oxidative stress causes to our cells and cardiovascular system. The question is, how do we make sure to get enough vitamin C, and is eating loads of fruit and drinking a lot of juice a good or bad solution?

- and preventing cancer from spreading

Vitamin B6 is needed for over 150 enzyme processes and has an overlooked role in the prevention of inflammation, which is a common thread in most chronic diseases, including cancer. Severe vitamin B6 deficiencies are rare, but scientists believe that even moderate deficiencies of the nutrient can increase the risk of many diseases. Deficiencies and poor utilization are a result of unhealthy diets, ageing, stimulant abuse, hormone pills and certain medical drugs, which means that many people are at risk of lacking this important vitamin.

- here is a check list of typical signs and diseases

An estimated two billion people worldwide lack zinc. The essential trace element is involved in more than 1,000 different enzyme processes, besides being a powerful antioxidant that protects the body’s cells. Even minor zinc deficiencies can lead to impaired digestion, infections, skin problems, fatigue, impaired fertility, and DNA damage. Such deficiencies can eventually increase the risk of cancer and other diseases. People with unhealthy diets, vegetarians, vegans, older people, and pregnant and breastfeeding women are at particular risk of lacking zinc. Even if your diet provides sufficient amounts of zinc, different factors can affect the uptake and utilization of the nutrient, thereby increasing your body’s actual need.

Migraine is the most common neurological disorder. According to a large review article, which was published in the scientific journal, Nutrients, large doses of magnesium may be useful for treating migraine by several accounts. Many people lack magnesium and should therefore consider taking a supplement. Just make sure that it is a form of magnesium, which the body can absorb and utilize. Also make sure to consume magnesium in the right balance with calcium, and avoid other things that can trigger a migraine attack such as certain foods and chemicals.