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Vitamin Supplements may reduce the risk of Alzheimer’s disease

Linda Berkowitz, January 2004

New research suggests that taking vitamin supplements, specifically vitamins E and C, may help protect the brain from the degenerative processes associated with Alzheimer’s disease.

Furthermore, researchers now suggest that the antioxidant vitamin supplements should be used as an ideal prevention strategy, as they are relatively non-toxic and are believed to have wide-ranging health benefits.

Another interesting conclusion of the study was that the effect required the combination of Vitamins E and C, taken as individual supplements, and not as part of a multivitamin supplement..

The study, “Reduced Risk of Alzheimer’s Disease in Users of Antioxidant Vitamin Supplements” was published in the January 2004 issue of the journal Archives of Neurology.

The study was led by researchers at the Johns Hopkins Bloomberg School of Public Health, Maryland USA.

Dr Peter P. Zandi, lead author of the study and an assistant professor in the University’s Department of Mental Health, said: "These results are extremely exciting. Our study suggests that the regular use of vitamin E in nutritional supplement doses, especially in combination with vitamin C, may reduce the risk of developing Alzheimer's disease."

The researchers examined data from the Cache County Study, which is a large, population-based investigation of the prevalence and incidence of Alzheimer's disease and other dementias in the USA. Residents who were 65 or older were assessed from 1996-1997 and again from 1998-2000.

Participants were asked at their first interview about vitamin usage. The researchers then compared the subsequent risk of developing Alzheimer's disease over the study interval among vitamin supplement users versus nonusers, to come to their conclusions.

Approximately 17 percent of the study participants reported taking vitamin E or C supplements. These individuals were significantly more likely to be female, younger, better educated and reported better general health when compared to non-supplement users. In addition to those who took vitamin supplements, another 20 percent of study participants used multivitamins, but without a high dosage of vitamin E or C.

The researchers found a trend towards reduced Alzheimer's disease with a combination of vitamin E and C supplements, even after controlling for age, sex, education and general health. However, there was no notable reduction in the risk of Alzheimer's disease with vitamin E or vitamin C alone or with multivitamins.

Multivitamins typically contain the recommended daily allowance of vitamin E (22 IU or 15 mg) and vitamin C (75-90 mg), while individual supplements contain doses up to 1,000 IU of vitamin E and 500-1,000 mg or more of vitamin C.

The researchers explained that the use of vitamins E and C may offer protection against Alzheimer's disease when taken together in the higher doses available in individual supplements. In addition, there may be some protective effect with vitamin E when it is combined with the lower doses of vitamin C found in multivitamins.

Dr. Zandi said, "Further study with randomized prevention trials is needed before drawing firm conclusions about the protective effects of these antioxidants. Such trials should consider testing a regimen of vitamin E and C in combination. If effective, the use of these antioxidant vitamins may offer an attractive strategy for the prevention of Alzheimer's disease."

Reference: “Reduced Risk of Alzheimer’s Disease in Users of Antioxidant Vitamin Supplements” Archives of Neurology Jan 2004. Peter P. Zandhi, James C. Anthony, Ara S. Khachaturian, Stephanie V. Stone, Deborah Gustafson, JoAnn T. Tschanz, Maria C. Norton and John C. S. Breitner.