I have long suspected this. Aging weakens the immune system and no amount of vitamin supplements can prevent infections from occurring in elderly individuals with weakened immune systems.Infection rates in older people living at home are not helped by taking vitamin or mineral tablets, researchers have found.
The Aberdeen University study looked at the effects of daily multivitamins compared with dummy placebo tablets.
It found that taking supplements seemed to make no difference in infection rates between the groups.
The research, published in the British Medical Journal, covered 900 people aged over 65 who were living at home.
The study authors said: "Regular use of commonly available multivitamin and multimineral supplements is unlikely to reduce the number of self-reported infections or associated use of health services for people living at home.
[ BBC News Health, Aug 04 2005 ]
Psychologically, I think taking vitamin supplements do indeed provide some sort of security. But not the one we expect.