• Sabiye Akbulut.
• Department of Gastroenterology, University of Health Sciences, Kartal Koşuyolu High Specialty Training and Research Hospital, Istanbul, Turkey.
• Medicine (Baltimore). 2022 Dec 16; 101 (50): e31892e31892.

AbstractCrohn's disease is a chronic inflammatory condition that can involve any area in the gastrointestinal tract often involving the distal ileum where vitamin B12 is specifically absorbed. The aim of this study was to ascertain serum vitamin B12 and folate levels in order to investigate the correlation among these vitamin levels and disease activation, localization, duration and age at the onset of the disease. Study population included 103 patients with Crohn's disease and a healthy control group of 114 individuals. C-reactive protein, vitamin B12, folate levels were studied along with hemogram analyses. The results were evaluated in statistical comparisons. While serum vitamin B12 levels and serum folate levels were 161.9 ± 63.2(73-496) pg/mL and 4.9 ± 1.4(1.2-9.4) ng/mL in the Crohn's patient group respectively, they were 321.7 ± 126.3(85-680) pg/mL and 7.6 ± 3.8(3-25.1) ng/mL in the control group respectively. Vitamin B12 and folate levels were distinctly lower in patients with Chron's disease than those of the control group (P < .001). The intragroup analysis of the patient group revealed that low vitamin B12 levels were significantly lower in the moderate group classified according to the Crohn's Disease Activity Index (P < .001), along with those in the L1 group with terminal/distal ileal involvement (P < .001). Vitamin B12 and folate deficiencies are quite prevalent in patients with Crohn's disease while this condition can lead to various complications and they prove to be important risk factors associated especially with thrombosis and its complications. Patients must be regularly followed-up for vitamin B12 and folate levels to supplement them where needed.Copyright © 2022 the Author(s). Published by Wolters Kluwer Health, Inc.

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