We review the study ” Switching to a low-glycemic diet may stop age-related eye disease, study suggests ” in which a gut–retina axis was discovered and benefited from a LG diet. Citation: Involvement of a gut–retina axis in protection against dietary glycemia-induced age-related macular degeneration. Proceedings of the National Academy of Sciences, 2017; 201702302 DOI: 10.1073/pnas.1702302114