17 October 2012
Low levels of vitamin D are associated with increased mortality in older African American and Caucasian adults, says a new US study.
In this observational study, the blood vitamin D concentrations, medical conditions and proportion of deaths of 2,638 Caucasians and African Americans aged 70 to 79 were measured (1). In addition to many health factors, the time of year was also taken into account due to the seasonal effects on vitamin D. The study results showed that vitamin D levels of less than 30 ng/ml were associated with significantly increased all-cause mortality. Observed in one-third of study participants, vitamin D insufficiency (defined as blood levels below 20 ng/ml) was associated with a nearly 50% increase in the mortality rate. The findings also indicated that the potential positive impact of remediating low vitamin D levels is greater in African Americans than Caucasians because vitamin D insufficiency is more common among African Americans.
The researchers commented that low levels of vitamin D may be a substantial public health concern for our nation’s older adults. For the past several years, there has been considerable interest in the role vitamin D plays in improving health and preventing disease. Low levels of vitamin D have been directly associated with various forms of cancer and cardiovascular disease.
6 June 2013
A new Australian study suggests that increased intake of omega-3 fatty acids may reduce depressive symptoms for older people with mild cognitive impairment, and lower their risk of digressing to dementia. At the same time, a controversially discussed review found no benefits associated with omega-3 fatty acid supplementation on cognitive function in cognitively healthy older people.
1 May 2013
It is believed that around a third of all cancer cases could be attributed to dietary and lifestyle factors. The link between nutrition and cancer risk is very complex, and it is difficult to establish the influence of individual dietary factors. The results of reviews have indicated that cancer-preventive diets above all consist of large quantities of plant-based foods such as fruit, vegetables, whole grains and pulses. With a low energy density, these foods supply the body with plenty of fiber, as well as varying amounts of essential micronutrients such as vitamins, carotenoids, minerals and trace elements, which are thought to potentially influence the specific mechanisms by which cancers develop. Several of these micronutrients are involved in the maintenance of genetic information (Deoxyribonucleic acid, DNA) and may therefore be able to prevent the formation of tumor cells.
15 November 2012
Recent research has indicated a variety of possible health implications linked to vitamin B12 deficiency without apparent symptoms. Vitamin B12 deficiency is common worldwide.
