Vitamin A seems to top the A-list of nutrients that are vital for a strong immune system.
While studying the effects of vitamin A in children, doctors observed that even a moderate deficiency can weaken the immune defenses of a child's respiratory tract. Vitamin A deficiency causes damage to the naturally protective mucous membrane barrier of the respiratory tract,
and it's thought that bacteria and viruses take advantage of that damage.
and it's thought that bacteria and viruses take advantage of that damage.
How might that affect a child's health? Doctor’s research showed that after a flu virus attacks, for example, the lining of a normal throat will repair itself. Not so in those who are vitamin A - deficient. Instead, a person might get that once-healthy cell replaced by an abnormal cell. That may predispose a person to having a more severe episode of an infection or having another infection on top of a viral infection. The link between vitamin A deficiency and the severity of respiratory disease was very well established.
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