Eating fatty fish such as salmon, trout or sardines twice a week was associated with a lower risk of diabetic retinopathy, according to a study of people with diabetes which was published in 2017 in JAMA.  This is probably because fatty fish have a lot of omega-3 fatty acids, which encourage the development of blood vessel growth, including in the eyes.  Omega-3’s have also been linked to a reduced risk of heart disease.

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