Vitamin A (2004), DHA, Omega-3 Fatty Acid and Retinitis Pigmentosa
Learn more about retinitis-pigmentosa treatment and information.
A 4 year long study published in 2004 reported that 1,200 mg of supplemental DHA along with high doses of vitamin A did not slow the progress of retinitis pigmentosa overall. However further subgroup analysis showed benefit for those who were taking vitamin A supplementation for the first time. In addition, those study participants taking vitamin A (but not DHA) who also had a higher dietary omega-3 fatty acid intake experienced substantial benefit. The rate of visual field decline was retarded by 40-50% yearly in those whose omega-3 intakes were equivalent to 1-2 servings of fatty fish weekly.
Berson EL, et al. Clinical trial of docosahexaenoic acid in patients with retinitis pigmentosa receiving vitamin A treatment. Arch Ophthalmol 122:1297-305, 2004.