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High dose vitamin C may harm eye health in elderly women

Published on

30 November 2009

Increased intakes of vitamin C may increase the risk of developing cataracts in some elderly people, a new study reports.

Findings from 24,593 Swedish women aged between 49 and 83 indicated that vitamin C use was associated with a 25 percent increase in the incidence of cataracts (1). Among the older women – over the age of 68 – high doses of vitamin C supplements (1,000 mg/day) were associated with a 38 percent increase in the risk of cataracts. The findings were further complicated in women on hormone replacement therapy, where the supplements were associated with a 56 percent increase in cataracts.

The researchers speculated that the use of vitamin C supplements may be associated with higher risk of age-related cataract among women.

REFERENCES

  1. Rautiainen S et al. Vitamin C supplements and the risk of age-related cataract: a population-based prospective cohort study in women. American Journal of Clinical Nutrition. 2009

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