Selenium is an essential trace element of vital importance to our general health. The nutrient is also important for our gut flora, and being selenium-deficient may increase the risk of irritable bowel syndrome, inflammatory gut diseases like Crohn’s disease and ulcerous colitis, and even bowel cancer. Our intestine is also called our “third brain” because both our gut flora and digestion have a significant influence on our mental well-being, according to a review article published in Frontiers in Nutrition. The authors focus on selenium because selenium deficiencies are common in China, Europe, and many other places, and supplementation may be necessary.

Vitamin D is important for multiple metabolic processes. However, overweight individuals have difficulty with activating the form of vitamin D that we get from supplements, and that impairs their utilization of the nutrient. Therefore, vitamin D supplements work differently on those who take them to prevent diseases like cancer, diabetes, and autoimmune diseases, according to a large American study called VITAL. A group of scientists looked closer at the study and found that overweight people may have an increased need for vitamin D.

- also in type 2 diabetes

Stable blood sugar levels are essential for our health, our energy levels, and our mood. However, millions of people across the globe suffer from insulin resistance and have impaired glucose uptake in their cells. Insulin resistance also occurs in people with type 2 diabetes. In a review article that is published in Advanced Biomedical Research, the authors look closer at magnesium’s role in connection with insulin resistance, blood sugar levels, and energy turnover. They conclude that magnesium supplementation may be relevant for people with insulin resistance and type 2 diabetes, and it is even important to get enough magnesium for preventing these conditions that come with an enormous human and socio-economic price tag.

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.

Over the past decades, it has been common practice to use zinc in creams and salves for treating various skin disorders. Zinc has wound-healing, antibiotic, and anti-inflammatory properties that make it useful for such purposes. In a review article that is published in International Journal of Molecular Sciences, the authors look closer at zinc’s role in skin health. They also look at whether zinc supplementation may positively affect eczema, acne, psoriasis, herpes, and other skin diseases. The authors also address the fact that around one third of the world’s population is zinc-deficient.

Considerably fewer cases of melanoma are found among people who take vitamin D supplements regularly compared with those who don’t. This was demonstrated in a new Finnish study that is published in Melanoma Research. The study supports earlier research that shows that lack of vitamin D doubles your risk of dying of melanoma.

The brain is particularly vulnerable towards oxidative stress and local inflammation that can set the stage for Alzheimer’s disease and other neurological conditions. However, it turns out that certain selenium-containing antioxidants are able to protect the brain neurons against damage. Also, selenium supplements can improve cognitive performance in patients suffering from mild cognitive impairment and Alzheimer’s disease, according to a meta-analysis that is published in Nutrients.

Vitamin C is of vital importance to our immune defense, and it serves as a powerful antioxidant to protect cells and tissues. Large quantities of vitamin C are able to improve lung function in patients with chronic obstructive pulmonary disease (COPD) and other chronic lung disorders. This was demonstrated in a large meta-analysis published in International Journal of Chronic Obstructive Pulmonary Disease.

Alzheimer’s is a growing health burden worldwide, and diet appears to play a major role. A large meta-analysis published in Frontiers in Aging Neuroscience recently revealed that patients with Alzheimer’s disease have lower levels of magnesium in their blood and cerebrospinal fluid compared to healthy controls. This suggests that being magnesium-deficient may be a risk factor in Alzheimer’s disease.

Depression is often caused by brain inflammation, and it looks as if high-dosed supplementation with EPA, a type of omega-3 fatty acids found in fish oil, may help as it reduces depression in patients with elevated inflammation markers in the blood. This was shown in a study that is published in The Journal of Clinical Psychiatry.

Bone fractures can be fatal, especially in old age where hip fractures typically result in hospitalization and early death. According to a study from Edith Cowan University in Australia, increased intake of vitamin K1 from foods like spinach, cabbage, and other vegetables lowers the risk of bone fractures later in life. Vitamin K1’s positive effect on bone health is linked to the fact that K1 is converted into vitamin K2 in the intestine, and vitamin K2-dependent proteins clear calcium from the bloodstream and embed the mineral in bone tissue.