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While this and other studies provide evidence that lutein and zeaxanthin may play a role in preventing macular degeneration (or at least reducing the risk of progression of AMD), it's less clear if these carotenoids help prevent cataracts

Puritan's Pride was formerly a parent company for many other brands as well, such as Biorganic Life and Aromappeal, but the categories for a majority of these brands on the Puritans Pride website are either empty, nonexistent, or only house out-of-stock products

The internet is a sprawling mess of conflicting advice on this

The main point is that methylation is influenced by more than just one gene, like MTHFR