Macular degeneration is a debilitating eye disorder generally considered to be irreversible, and it remains the leading cause of blindness in individuals over the age of 55. Risks for the disorder commonly run in families, but a new study suggests that the risk can be reduced by not smoking and by a diet high in vitamin D plus the nutrients betaine (found in fish, grains and spinach) and methionine (found in poultry, fish and dairy foods).
Researchers from Tufts Medical Center identified cases of elderly, male identical twins, where one brother had late stage macular degeneration and his sibling’s disorder was at an early stage. The researchers found that the more severe cases were found among the twin who was the heavier smoker and that disease progression was slowest among those who had higher intakes of vitamin D from dietary sources such as fish or milk and betaine and methionine
