A new University of Buffalo study suggests that women under the age of 75 with high vitamin D status are less likely to have early age-related macular degeneration (AMD).

Women with higher dietary intake levels of vitamin D are less likely to manifest symptoms of early age-related macular degeneration, as seen in this patient.
Lead author Amy E. Millen, Ph.D., said that women under the age of 75 with lower than 38 nanomoles per liter of vitamin D concentrations were more likely to have age-related macular degeneration than women with 38 nanomoles per liter. She further went on to add that blood concentrations above 38 nanomoles per liter were associated with at least a 44% lower chance of developing AMD. Being at a higher level than 38 nanometers per liter of vitamin D does not appear to be more protective.

The Institute of Medicine considers an adult with lower than 30 nanomoles per liter of vitamin D concentration to be vitamin D deficient and a person with a concentration of less than 50 nanomoles per liter to be at an increased risk for vitamin D inadequacy.

Vitamin D may be increased by spending moderate amounts of time outside, eating foods rich with vitamin D such as fatty fish, fortified milk and fortified cereal, and by taking supplements.

Millen AE, Voland R, Sondel SA, et al; for the CAREDS Study Group. Vitamin D Status and Early Age-Related Macular Degeneration in Postmenopausal Women. Arch Ophthalmol. 2011 Apr;129(4):481-9.