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doi: 10.1002/hep4.2012
Van Konynenburg's protocol does not rely on information about patient's SNP data, but is a more one size fits all approach

one study found rates of yearly vision decline were slower among subjects supplementing with vitamin A and consuming greater than 200 mg of omega-3s than among those supplementing with vitamin A and consuming lower amounts of omega-3s (Berson 2012)

Langmuir 25 (11), 65806586 (2009) K

And broad dietary patterns matter too

This is guessing
