Colestipol can affect this through 2 different nutrient pathways: Vitamin A, Folic Acid. This medication is commonly used for High Cholesterol.
Each nutrient below contributes to this impact through a different mechanism.
Low vitamin A status does not just affect eyes and immunity; it can also quietly worsen anemia by disrupting red blood cell production and iron handling, leaving people more fatigued, short of breath, and less able to fight infections. Studies in adolescents and other at‑risk groups have found that vitamin A deficiency often travels with iron‑deficiency anemia, and that correcting vitamin A, along with iron, can improve hemoglobin more than iron alone in some settings. For someone who keeps being told they are “just anemic” despite treatment, especially if they also have poor diet quality or chronic infections, it can be both concerning and encouraging to learn that an unrecognized vitamin A deficiency may be a modifiable part of why their blood counts and energy are not bouncing back.
Ahmed F, Khan MR, Jackson AA. Concomitant supplemental vitamin A enhances the response to weekly supplemental iron and folic acid in anemic teenagers in urban Bangladesh. Am J Clin Nutr. 2001 Jul;74(1):108-15. Htet MK, Fahmida U, Dillon D, Akib A, Utomo B, Thurnham DI. The influence of vitamin A status on iron-deficiency anaemia in anaemic adolescent schoolgirls in Myanmar. Public Health Nutr. 2014 Oct;17(10):2325-32. Amel Alouache. Vitamin A: Benefits and Consequences of Its Deficiency on Health. May 2025. DOI: 10.5772/intechopen.1010232. Mejia LA, Erdman JW Jr. Impact of Vitamin A Deficiency on Iron Metabolism and Anemia: A Historical Perspective and Research Advances. Nutr Rev. 2025 Mar 1;83(3):577-585.
Folate (folic acid) deficiency impairs DNA synthesis in rapidly dividing cells, which leads to megaloblastic anemia characterized by enlarged red blood cells, fatigue, pallor, and sometimes shortness of breath. Population studies have shown that folate deficiency and macrocytosis can be present for months before overt symptoms appear, and in some cohorts, up to roughly one quarter of anemic adults had an underlying folate or B12 deficiency rather than iron deficiency alone. The encouraging clinical point is that, once identified, folate‑responsive megaloblastic anemia often improves within weeks of adequate folic acid repletion, with reticulocyte counts rising in about 5–7 days and hemoglobin recovering more gradually over several weeks.
Koury MJ, Price JO, Hicks GG. Apoptosis in megaloblastic anemia occurs during DNA synthesis by a p53-independent, nucleoside-reversible mechanism. Blood. 2000 Nov 1;96(9):3249-55. Daniel S. Socha, MD, Sherwin I. DeSouza, MD, Aron Flagg, MD, Mikkael Sekeres, MD, MS and Heesun J. Rogers, MD, PhD. Severe megaloblastic anemia: Vitamin deficiency and other causes. Cleveland Clinic Journal of Medicine March 2020, 87 (3) 153-164. H.B. Castellanos-Sinco, et al. Megaloblastic anaemia: Folic acid and vitamin B12 metabolism. Revista Médica del Hospital General de México. Vol. 78. Issue 3. Pages 105-150 (July - September 2015). Anis Hariz, et al. Megaloblastic Anemia. StatPearls April 3, 2023.
Some side effects may be linked to nutrient depletion caused by this medication.
Bile acid sequestrants work by binding to cholesterol and bile acids in the intestine, unfortunately, they can also bind to fat soluble vitamins like vitamin D3, hindering its uptake into the bloodstream. For individuals taking bile acid sequestrants, supplementing with vitamin D3 may be advisable to prevent or address potential deficiencies.
Bile acid sequestrants work by binding to cholesterol and bile acids in the intestine, unfortunately, they can also bind to fat soluble vitamins like vitamin E, hindering its uptake into the bloodstream. For individuals taking bile acid sequestrants, supplementing with vitamin E may be advisable to prevent or address potential deficiencies.
Bile acid sequestrants work by binding to cholesterol and bile acids in the intestine, unfortunately, they can also bind to fat soluble vitamins like vitamin A, hindering its uptake into the bloodstream. For individuals taking bile acid sequestrants, supplementing with vitamin A may be advisable to prevent or address potential deficiencies.
Bile acid sequestrants work by binding to cholesterol and bile acids in the intestine, unfortunately, they can also bind to fat soluble vitamins like vitamin K, hindering its uptake into the bloodstream. For individuals taking bile acid sequestrants, supplementing with vitamin K may be advisable to prevent or address potential deficiencies.
Bile acid sequestrants work by binding to cholesterol and bile acids in the intestine, unfortunately, they can also bind to folic acid, hindering its uptake into the bloodstream. For individuals taking bile acid sequestrants, supplementing with folic acid may be advisable to prevent or address potential deficiencies.