PMID- 35631186 OWN - NLM STAT- MEDLINE DCOM- 20220531 LR - 20220716 IS - 2072-6643 (Electronic) IS - 2072-6643 (Linking) VI - 14 IP - 10 DP - 2022 May 13 TI - Vitamin B12 Deficiency in Patients with Diabetes on Metformin: Arab Countries. LID - 10.3390/nu14102046 [doi] LID - 2046 AB - BACKGROUND: Diabetes is a global pandemic, especially in Arab countries. AIM: The goal of this study was to review the published studies that were conducted to determine the relationship between metformin treatment for type 2 diabetes mellitus (T2DM) and vitamin B12 deficiency and to identify possible complications in this relationship. METHODS: I searched for all relevant studies published in English before 2020 on the PubMed and Web of Knowledge databases using the following terms: "metformin", "vitamin B12", "neuropathy", "diabetes mellitus", and Middle Eastern countries. RESULTS: Eleven studies were included in this review which indicated an association between taking metformin and B12 deficiency in patients with T2DM in Arab countries. This B12 deficiency was found to be negatively associated with the dose and duration of metformin therapy. The physician's knowledge of current ADA recommendations regarding supplementation with and screening of the B12 level for T2DM patients on metformin was also found to have an effect. CONCLUSION: Metformin therapy is associated with B12 deficiency among people with T2DM in Arabic countries. Thus, diabetes must be managed in compliance with current guidelines and recommendations, and B12 levels must be routinely monitored, particularly in those who have been long-term takers of metformin, to ensure the suitable management of diabetes and its complications. FAU - Alhaji, Jwaher Haji AU - Alhaji JH AUID- ORCID: 0000-0001-7473-3037 AD - Department of Health Sciences, College of Applied Studies and Community Service, King Saud University, P.O. Box 145111, Riyadh ZIP 4545, Saudi Arabia. LA - eng PT - Journal Article PT - Review DEP - 20220513 PL - Switzerland TA - Nutrients JT - Nutrients JID - 101521595 RN - 0 (Hypoglycemic Agents) RN - 9100L32L2N (Metformin) SB - IM MH - Arabs MH - *Diabetes Mellitus, Type 2/complications/drug therapy/epidemiology MH - Humans MH - Hypoglycemic Agents/therapeutic use MH - *Metformin/adverse effects MH - *Vitamin B 12 Deficiency/diagnosis PMC - PMC9144422 OTO - NOTNLM OT - Arab countries OT - T2DM OT - diabetes OT - metformin OT - vitamin B12 COIS- The author declares no conflict of interest. EDAT- 2022/05/29 06:00 MHDA- 2022/06/01 06:00 PMCR- 2022/05/13 CRDT- 2022/05/28 01:37 PHST- 2022/04/21 00:00 [received] PHST- 2022/05/07 00:00 [revised] PHST- 2022/05/11 00:00 [accepted] PHST- 2022/05/28 01:37 [entrez] PHST- 2022/05/29 06:00 [pubmed] PHST- 2022/06/01 06:00 [medline] PHST- 2022/05/13 00:00 [pmc-release] AID - nu14102046 [pii] AID - nutrients-14-02046 [pii] AID - 10.3390/nu14102046 [doi] PST - epublish SO - Nutrients. 2022 May 13;14(10):2046. doi: 10.3390/nu14102046.