High vitamin A, E, and D intake linked to fewer respiratory
Now open: Certificate Course in Management of Covid-19 by Govt. Of Gujarat and PlexusMDKnow more...Now open: Certificate Course in Management of Covid-19 by Govt. Of Gujarat and PlexusMDKnow more...
High vitamin A, E, and D intake may be linked to fewer respiratory complaints in adults, suggests an analysis of nationally representative long term survey data, published online in the journal BMJ Nutrition Prevention & Health.

Nutrition has a key role in cutting the risk of several infections, although exactly how it boosts immunity is complex and not fully understood. Vitamins A, E, C and D have already been deemed to aid the normal functioning of the immune system in the European Union, and the American Nutrition Association suggests these vitamins may also help stave off respiratory infections.

The researchers wanted to explore whether the intake of these vitamins from both diet and supplements might be linked to the prevalence of respiratory complaints in a nationally representative sample of UK adults.

They drew on information provided by 6115 adult participants in the 2008-2016 National Diet and Nutrition Survey Rolling Programme (NDNS RP) who had completed three or more days of diet diaries.

Respiratory complaints were reported by the participants and had not been diagnosed by a clinician. They were broadly defined, and included both infectious and non-infectious conditions, such as colds, chronic obstructive pulmonary disease, and asthma.

The researchers looked at dietary intake only (continuous exposure) and that from diet and supplements (binary exposure), accounting for potentially influential factors, such as age, sex, weight (BMI), smoking, household income and total energy intake.

In all, there were 33 cases of respiratory complaints. These respondents were generally older and less likely to say they regularly took vitamins A, E, C or D supplements.

There was no obvious association between BMI and vitamin intake, or between BMI and respiratory complaints. And it wasn't possible to determine any associations with vitamin C supplements as none of the adults with respiratory complaints said they took them.

But vitamin A and E intake from both diet and supplements was associated with a lower prevalence of respiratory complaints in UK adults. Major dietary sources of vitamin A include liver, whole milk, and cheese, as well as carrots, dark green leafy vegetables, and orange-coloured fruits. Major dietary sources of vitamin E include vegetable oils, nuts, and seeds.

And vitamin D intake from supplements, but not from diet, was associated with fewer respiratory complaints, prompting the researchers to suggest that the findings add to the current scientific debate on the value of vitamin D supplementation.

These findings are consistent with the hypothesis that supplementation is critical to ensuring adequate vitamin D status is maintained and potentially indicate that intake of vitamin D from diet alone cannot help maintain adequate vitamin D status.

Source: https://nutrition.bmj.com/content/early/2020/10/05/bmjnph-2020-000150
1 share
Like
Comment
Share