Quite a few people have been asking on the forum and via email about interventions for age-related cataracts. Here are some links below. The type of vitamin E used in all studies was alpha-tocopherol and the dose varied from 12mg/day all the way up to HED of 15mg/kg daily for the rodent model studies. The effect was dose dependent in both animal and human trials but anything over 150mg daily for humans was highly effective.
Methodology of the VECAT study: vitamin E intervention in cataract and age-related maculopathy. - PubMed - NCBI
Vitamin E can protect against ultraviolet radiation-induced cataract in albino rats. - PubMed - NCBI
Dose-response relationship for α-tocopherol prevention of ultraviolet radiation induced cataract in rat. - PubMed - NCBI
High Vitamin E Cuts Cataract Risk By Half
"...A study using experimental animals found that vitamin E — as alpha-tocopherol, the most common form sold — protected the animals from radiation-induced cataracts. In a human study, 175 people with cataracts were compared to 175 without cataracts, and researchers found that those with the highest vitamin E blood levels had a 50 percent lower risk of developing a cataract. The Vitamin E and Cataract Prevention Study (VECAT) was a randomized trial that examined healthy volunteers ages 55 to 80 over a four-year period after being given either vitamin E or a placebo."
"...In a long-term study of 764 people, scientists reported a 30 percent reduction in lens clouding in subjects who took a daily multiple vitamin, along with a 57 percent reduction in regular users of vitamin E and a 42 percent reduction in those with high levels of vitamin E in their plasma. Vitamin E is a powerful antioxidant and raises the glutathione level in the lens. The recommended dose is 500 IU a day as a mixed tocopherol (natural vitamin E)."
Interesting. I wonder how that relates to this: "Cataracts Are Twice As Common In Men Over The Age Of 65, Who Took Big Supplements Of Vit. E And Vit