Systematic Review on 25-HydroxyvitaminD Levels in Various Populations of the Russian North
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We analyzed published data on the levels of serum 25(OH)D in apparently healthy individuals from the Russian Far North. The total sample included 2061 subjects of various age and ethnic groups. The serum levels of 25(OH)D and its age dynamics in the northerners living in towns are similar to those of the inhabitants of the temperate climate zone of Russia. Data on the age-related changes in the vitamin D status of the indigenous Arctic people with the traditional lifestyle are scanty. Serum 25(OH)D concentrations in the indigenous and alien population of the high-latitude regions reflect the seasonal changes in the daylight duration. The level of vitamin D decreases in winter and reaches minimum in February, i.e., after the end of the polar night. We compared data on rural Russian and indigenous people and found ethnic differences in the 25(OH)D concentrations; however, the vitamin D status of various indigenous groups of the Russian North is poorly studied. We could not find publications that analyze the 25(OH)D concentrations along with the direct assessment of food consumption. The available data do not contradict the opinion that the traditional food products are beneficial. However, there are no studies to support this opinion. There are little data on the effect of foods from marine mammal catch, marine and freshwater fishery, and venison on the vitamin D status of the indigenous people of the Russian North.
Keywords:vitamin D 25-hydroxyvitamin D 25(OH)D vitamin D status Arctic indigenous population nutrition natural light latitude
The study was performed at the Institute and Museum of Anthropology of Moscow State University (Moscow) in the framework of research “Anthropology of Eurasian Populations (Biological Aspects)” (project no. AAAA-A19-119013090163-2). The study was also partially supported by the Russian Foundation for Basic Research (project no. 18-09-00487).
COMPLIANCE WITH ETHICAL STANDARDS
The authors report no conflicts of interest related to the implementation of the research and publication of its results. This article does not contain any studies involving animals or human participants performed by any of the authors.
Contribution to the study. The authors made an equal contribution to the collection of materials, their treatment during the study and the creation of the text.
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