Questran can affect this through 2 different nutrient pathways: Vitamin D3, Vitamin E. This medication is commonly used for High Cholesterol.
Each nutrient below contributes to this impact through a different mechanism.
Vitamin D acts as an immunomodulatory hormone, so deficiency has been associated with higher rates of respiratory infections and a tendency toward more frequent or severe viral and bacterial illnesses. Observational studies also link low 25‑hydroxyvitamin D levels with increased risk or activity of several autoimmune conditions, including multiple sclerosis, type 1 diabetes, and autoimmune thyroid disease, suggesting that inadequate vitamin D may push the immune system toward attacking the body’s own tissues. Clinically, maintaining sufficient vitamin D status is viewed as one relatively simple strategy that may help support balanced immune responses and, in some contexts, may modestly reduce infection risk or autoimmune flare frequency when combined with standard medical care.
Martens PJ, Gysemans C, Verstuyf A, Mathieu AC. Vitamin D's Effect on Immune Function. Nutrients. 2020 Apr 28;12(5):1248. Aslam J, Sohailuddin M, Abbas SM, Shaikh MTA, Saleem S, Mubeen A, Ahmad B, Haseeb M, Mzahri EUH. The Schematic Assessment of Vitamin D Deficiency in Relation to Autoimmune Disorders and Its Implications in Internal Medicine. Cureus. 2025 Apr 24;17(4):e82949. Jolliffe DA, Camargo CA Jr, Sluyter JD, Aglipay M, Aloia JF, et al. Vitamin D supplementation to prevent acute respiratory infections: a systematic review and meta-analysis of aggregate data from randomised controlled trials. Lancet Diabetes Endocrinol. 2021 May;9(5):276-292. Simpson, S., van der Mei, I., Stewart, N. et al. Weekly cholecalciferol supplementation results in significant reductions in infection risk among the vitamin D deficient: results from the CIPRIS pilot RCT. BMC Nutr 1, 7 (2015). Kriegel MA, Manson JE, Costenbader KH. Does vitamin D affect risk of developing autoimmune disease?: a systematic review. Semin Arthritis Rheum. 2011 Jun;40(6):512-531.e8.
In both experimental models and human reports, vitamin E deficiency has been shown to blunt immune defenses, particularly T‑cell–mediated responses, leading to greater vulnerability to infections. A classic case of severe vitamin E deficiency from intestinal malabsorption demonstrated markedly reduced delayed‑type hypersensitivity and impaired T‑cell interleukin‑2 production that normalized after vitamin E repletion, offering direct proof that this deficiency can cause reversible T‑cell dysfunction in humans. In older adults, vitamin E supplementation has been associated with enhanced naïve T‑cell function, better resistance to influenza in animal studies, and a lower risk of upper respiratory infections in nursing‑home residents, suggesting that maintaining adequate vitamin E status may be an underappreciated strategy to support immune resilience across the lifespan.
Kowdley KV, Mason JB, Meydani SN, Cornwall S, Grand RJ. Vitamin E deficiency and impaired cellular immunity related to intestinal fat malabsorption. Gastroenterology. 1992 Jun;102(6):2139-42. Lewis ED, Meydani SN, Wu D. Regulatory role of vitamin E in the immune system and inflammation. IUBMB Life. 2019 Apr;71(4):487-494. Meydani SN, Han SN, Wu D. Vitamin E and immune response in the aged: molecular mechanisms and clinical implications. Immunol Rev. 2005 Jun;205(1):269-84. Dang H, Li J, Liu C, Xu F. The Association Between Vitamin E Deficiency and Critically Ill Children With Sepsis and Septic Shock. Front Nutr. 2021 Jun 16;8:648442.
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 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.
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 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.