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Current State of Evidence: Influence of Nutritional and Nutrigenetic Factors on Immunity in the COVID-19 Pandemic Framework
Galmés et al., Nutrients, doi:10.3390/nu12092738
Galmés et al., Current State of Evidence: Influence of Nutritional and Nutrigenetic Factors on Immunity in the COVID-19.., Nutrients, doi:10.3390/nu12092738
Sep 2020   Source   PDF  
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Ecological study of European countries analyzing 10 vitamins and minerals endorsed by the European Food Safety Authority as having sufficient evidence for a causal relationship between intake and optimal immune system function: vitamins D, A, C, B6, B9, B12, zinc, copper, iron, and selenium.
Dietary intake levels of all 10 showed an inverse correlation with the relative mortality rate, while all except vitamin B6 and selenium showed an inverse correlation with incidence and mortality. Most individual correlations did not reach statistical significance. Authors note greater association in populations genetically predisposed towards lower micronutrient status.
Galmés et al., 8 Sep 2020, retrospective, peer-reviewed, 3 authors.
Contact: (corresponding author),,
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Abstract: nutrients Article Current State of Evidence: Influence of Nutritional and Nutrigenetic Factors on Immunity in the COVID-19 Pandemic Framework Sebastià Galmés 1,2,3,4 , Francisca Serra 1,2,3,4, * 1 2 3 4 * and Andreu Palou 1,2,3 Laboratory of Molecular Biology, Nutrition and Biotechnology, NUO Group, Universitat de les Illes Balears, 07122 Palma, Spain; (S.G.); (A.P.) CIBER de Fisiopatología de la Obesidad y Nutrición (CIBEROBN), 28029 Madrid, Spain Institut d’Investigació Sanitària Illes Balears (IdISBa), 07120 Palma, Spain Alimentómica S.L., Spin-off n.1 of the University of the Balearic Islands, 07121 Palma, Spain Correspondence:; Tel.: +34-971-173-051 Received: 31 July 2020; Accepted: 4 September 2020; Published: 8 September 2020   Abstract: The pandemic caused by the new coronavirus has caused shock waves in many countries, producing a global health crisis worldwide. Lack of knowledge of the biological mechanisms of viruses, plus the absence of effective treatments against the disease (COVID-19) and/or vaccines have pulled factors that can compromise the proper functioning of the immune system to fight against infectious diseases into the spotlight. The optimal status of specific nutrients is considered crucial to keeping immune components within their normal activity, helping to avoid and overcome infections. Specifically, the European Food Safety Authority (EFSA) evaluated and deems six vitamins (D, A, C, Folate, B6 , B12 ) and four minerals (zinc, iron, copper and selenium) to be essential for the normal functioning of the immune system, due to the scientific evidence collected so far. In this report, an update on the evidence of the contribution of nutritional factors as immune-enhancing aspects, factors that could reduce their bioavailability, and the role of the optimal status of these nutrients within the COVID-19 pandemic context was carried out. First, a non-systematic review of the current state of knowledge regarding the impact of an optimal nutritional status of these nutrients on the proper functioning of the immune system as well as their potential role in COVID-19 prevention/treatment was carried out by searching for available scientific evidence in PubMed and LitCovid databases. Second, a compilation from published sources and an analysis of nutritional data from 10 European countries was performed, and the relationship between country nutritional status and epidemiological COVID-19 data (available in the Worldometers database) was evaluated following an ecological study design. Furthermore, the potential effect of genetics was considered through the selection of genetic variants previously identified in Genome-Wide Association studies (GWAs) as influencing the nutritional status of these 10 considered nutrients. Therefore, access to genetic information in accessible databases (1000genomes, by Ensembl) of individuals from European populations enabled an approximation that countries might present a greater risk of suboptimal status of the nutrients studied. Results from the review approach show the importance of maintaining a correct nutritional status of these 10 nutrients analyzed for the health of the immune system, highlighting the importance of Vitamin D and iron in the context of COVID-19. Besides, the ecological study demonstrates that intake levels of relevant micronutrients—especially Vitamins D, C, B12 , and iron—are..
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