A total of 34 patients treated with 177Lu-PSMA for PCa (n = 20) or 177Lu-dotatate for neuroendocrine tumors (n = 14) were stratified over 27 control cycles without vitamin C and 24 cycles with 1500 mg QD vitamin C, 2 days prior to 177Lu-treatment. Here, FOLH1 is linked to posterior cortical atrophy.