My mother has end-stage renal disease and poor morphology results (reduced hematocrit, hemoglobin, erythrocytes, lymphocytes), as well as low iron levels. Vitamin B12 is normal, as is erythropoietin. For half a year she took Feroplex 2 times a day along with vitamin C 200 mg administered 2 times a day along with iron. In addition, mom takes folic acid, vitamin B complex, vit. D, A+E, omega acids and magnesium, zinc and calcium (micronutrients at intervals of at least 4 hours) The level of iron in the blood not only did not increase, but even dropped from 24 to 20. The family doctor changed the preparation with iron to Ferrum drug in syrup. I bought and give my mother Colostrum genactiv. Iron is washed down with fruit juice. My question is: what else can I do to improve the absorption of iron taken orally? What dose of vitamin C is safe for advanced kidney failure? Will Ferrum drug syrup be a more effective preparation than Feroplex?