By: Talking Nutrition Editors
The immune system is our ‘always on’ defense system, continuously carrying out surveillance to protect us from infections. Upon exposure to a pathogen, the immune system defends the body from harm via a two-pronged approach: innate immunity and adaptive (or acquired) immunity.
As Dr. Bruins explains, innate immunity is the immunity that humans are born with, consisting of physical barriers that protect the body from pathogen invasion and first line of cellular defenses that recognize and remove immediate infectious threats. Throughout life, we also acquire a second line of defense, the adaptive immune system.
The adaptive, or acquired, immune response is slower than the innate response (days to weeks); however, adaptive immunity is more specific towards eliminating pathogens and has memory. The adaptive immunity comprises specialized white blood cells – namely T and B lymphocytes. These work together to identify and destroy infected host cells through the production of antibodies that travel through the bloodstream and bind to the invader, flagging the invader for destruction by immune cells. Vitally, the adaptive immune system that learns from new acquired infections, generates ‘memory cells’, which enables a fast-adaptive response if the body is re-infected by the same pathogen.
Vitamin D plays an essential role in both the innate and adaptive immune functions. Research has shown that vitamin D is involved in the response to infections/pathogens1,2,3 and can support production of antimicrobial peptides and support dampening the overactivation of the immune response to prevent its potentially damaging effects.4 Human studies have shown that vitamin D also reduces the likelihood of acute respiratory tract infections.5
The COVID-19 pandemic has led to increased attention from scientists, governments, and consumers on the role of vitamin D in helping to prevent infection and support immune response. Research undertaken before the beginning of the crisis has suggested that vitamin D supplementation could help to lower the risk of acute respiratory tract infections. Emerging evidence demonstrates a link between low vitamin D status and COVID-19 infection, which has triggered widespread interest. Dr. Bruins specifically references two studies that offer emerging evidence on the link between vitamin D status and COVID-19.
The first study, performed across 20 European countries, evaluates the correlation between vitamin D levels with COVID-19 cases and deaths, and found that a lower vitamin D status increased an individual’s chance of infection.6 More information about the second study cited by Dr. Bruins, which explores the association between vitamin D status and SARS-Cov-2 test positivity in nearly 200,000 US patients,7 will be discussed in our next science blog featuring expert insights from Dr. Adrian Gombart, whose research specializes on understanding how vitamin D impacts immunity.
As we are exposed to less sunlight – whether as a result of seasonal or lifestyle changes – and few foods offer a sufficient source of the vitamin, it’s perhaps little surprise that populations across the globe suffer from vitamin D deficiency. In fact, it is estimated that 88% of individuals worldwide have insufficient vitamin D status.8
But as Dr. Bruins explains, there are various nutritional solutions available to improve vitamin D status to help people worldwide optimize their immunity. Fortifying staple foods such as milk and bread can offer a reliable source of the sunshine vitamin to recover insufficient levels, as well taking vitamin D supplements daily.
Continuous research and insights are also essential to improving global vitamin D status; helping food and dietary supplement manufacturers understand needs, challenges and trends that can inspire the creation of innovative and appealing solutions. This takes more than an ingredients provider. This takes a partner. As an end-to-end, purpose-led partner, dsm-firmenich takes a human-centric approach, pouring all of our curiosity, insights and innovation into every stage of the product development lifecycle. dsm-firmenich’s broad portfolio of science-backed products, customized solutions and expert services can mean the difference between
Contact us to partner and discuss innovation opportunities for purpose-led solutions that address consumer concerns around immune health.
20 November 2020
8 min read
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