As we grow older, our risk of hearing loss increases, and our diet plays a major role. Apparently, there is a link between hearing loss and being deficient in an omega-3 fatty acid that we get from oily fish and fish oil supplements. This was seen in a study that was presented in Boston at a meeting for the American Society for Nutrition – an American company for professional researchers and practitioners in nutrition. The scientists mention that increased intake of this particular omega-3 fatty acid from the diet or from supplements may help prevent hearing loss.

A chronic cough often follows in the wake of virus infections such as colds, influenza, and COVID-19. Lack of vitamin D seems to be a major contributor, coupled with the fact that a vitamin D deficiency often increases during the disease period. Vitamin D is of vital importance to a strong immune defense and also helps to regulate inflammation. Therefore, supplementation with vitamin D may be worth considering as a way of preventing virus infections and treating complications such as chronic cough, according to two studies that are published in European Respiratory Journal.

Vitamin B12 is important for the development and function of our central nervous system. In the past decades, science has also found similarities between sclerosis and the neurological symptoms that occur in people who lack vitamin B12. In a new study that is published in Cell Reports, scientists have found the molecular relation between vitamin B12 and the function of supportive brain cells.

The body’s vitamin D status can be used to predict the risk of contracting COVID-19, developing serious symptoms in the acute disease phase, and dying of its complications. This was demonstrated in a large Chinese study, where majmost of the hospitalized COVID-19 patients lacked vitamin D.

Iron is vital for red blood cells and their ability to carry oxygen, for energy turnover, and for muscle function. For those reasons, iron is highly important for athletes because iron deficiency anemia impairs your performance. Still, iron deficiency is quite common, especially in connection with endurance sports and menstrual bleeding. A plant-based diet and low stomach acid can also increase the risk of becoming iron-deficient. In a new review article that is published in Life, a group of scientists has looked at iron and iron supplementation and how it can affect athletic performance.

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.

Refined foods and plant-based diets lack vital nutrients that are highly important for a pregnant woman and the development of her unborn child’s body and brain. This was shown in a large study of mothers from high-income countries, where 90 percent of the participants lacked key nutrients such as vitamin B2, vitamin B6, folic acid, vitamin B12, and vitamin D. These widespread deficiencies have huge health consequences, which may be irreversible for the child. The scientists explain that the problem is made worse by the global push for eating more plant-based diets. Lack of omega-3 fatty acids that are primarily found in oily fish is also common and may harm the development of the child’s brain and increase the risk of postnatal depression in the mother.

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.