Recommended Daily Allowances. Adult men should aim to consume about 11 milligrams of zinc daily, while adult women 19 years old and over need about 8 milligrams. 

Should You Take Zinc for Your Macular Degeneration?

How to weigh benefits of over-the-counter supplement

If you have developed macular degeneration, you may have heard of taking zinc to slow this disease. But is that the best choice — and does it work?
Whether you are considering zinc or other vitamins and nutrients for eye health, here’s what you need to know. Sometimes the information we have available is contradictory, or research is unclear. That’s the case with zinc. It appears to help delay age-related macular degeneration (AMD) in some studies, but not in others.
But when we consider all the information available, the best research shows that zinc works best when you use it as part of a powerful combination, says ophthalmologist Amy Babiuch, MD.
She says, yes, a zinc supplement may help slow AMD, but the best supplement to take has a mix of nutrients, not just zinc as a single ingredient.
Studies support mix of vitamins, minerals
There’s no proven way to prevent the early stages AMD. However, two extensive clinical studies found that a specific mix of vitamins, antioxidants and zinc may delay progression of advanced AMD.
Taking this supplement can help you keep your vision longer if you have intermediate AMD, or advanced AMD in one eye.
The National Eye Institute sponsored both studies. The first, the Age-Related Eye Disease Study (AREDS) found that daily high doses of vitamin A and C, beta-carotene, zinc and copper could slow the progression of advanced AMD.
Emerging from the second study, researchers found no significant changes in effectiveness when they reduced the amount of zinc and replaced the beta-carotene with zeaxanthin and lutein.

Why researchers modified the formula

The updated formulation emerging from the second study is referred to as the AREDS2 formulation. In part, investigators reduced the zinc because some nutritionists worried about the high dose…..
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Source: Cleveland Clinic