In this study, only MR-pro-AMD and angiotensin II levels correlated significantly with sodium status, while pro-atrial natriuretic peptide (MR-pro-ANP), renin, aldosterone, cortisol, norepinephrine, epinephrine, copeptin, pro-endothelin, and EPO did not [69]. Here, EPO is linked to age-related macular degeneration.