Metformin-Induced Vitamin B12 Deficiency among Type 2 Diabetes Mellitus' Patients: A Systematic Review.
Diabetes mellitus
deficiency
metformin
treatment
type 2
vitamin B12
Journal
Current diabetes reviews
ISSN: 1875-6417
Titre abrégé: Curr Diabetes Rev
Pays: United Arab Emirates
ID NLM: 101253260
Informations de publication
Date de publication:
2023
2023
Historique:
received:
02
12
2021
revised:
30
01
2022
accepted:
03
03
2022
pubmed:
21
4
2022
medline:
28
3
2023
entrez:
20
4
2022
Statut:
ppublish
Résumé
Type 2 diabetes mellitus is one of the most globally common chronic diseases. Metformin is the most popular prescribed medication for the treatment of diabetes. Studies suggest that metformin is associated with vitamin B12 deficiency, which may impart adverse health complications. This review screens the literature to clarify the effect of metformin on vitamin B12 deficiency among type 2 diabetes mellitus patients. Google Scholar, PubMed, Research Gate, and Semantic Scholar, were searched for the association between metformin intake and vitamin B12 deficiency in type 2 diabetes mellitus patients using relevant keywords and their combinations. Selected studies were those conducted on patients taking metformin with no vitamin B12 supplement. Nineteen studies (fifteen observational studies and four randomized controlled trials) met the inclusion criteria. These studies were assessed for design, setting, study population, and overall quality. There is a positive correlation between metformin intake and vitamin B12 deficiency. This has been accompanied by increased homocysteine and decreased folate levels. Despite the refuting of the findings, most studies showed that higher doses of metformin were strongly associated with lower vitamin B12 levels, while the duration of treatment was not. Regular measurement of vitamin B12 levels during long-term metformin treatment is recommended. A clear policy should be in place to illuminate the importance of this screening in preventing vitamin B12 deficiency complications. Taking therapeutic supplements or injections of vitamin B12 along with a vitamin B12-rich diet may decrease the incidence of its deficiency in diabetic patients taking metformin.
Sections du résumé
BACKGROUND
Type 2 diabetes mellitus is one of the most globally common chronic diseases. Metformin is the most popular prescribed medication for the treatment of diabetes. Studies suggest that metformin is associated with vitamin B12 deficiency, which may impart adverse health complications.
OBJECTIVE
This review screens the literature to clarify the effect of metformin on vitamin B12 deficiency among type 2 diabetes mellitus patients.
METHODS
Google Scholar, PubMed, Research Gate, and Semantic Scholar, were searched for the association between metformin intake and vitamin B12 deficiency in type 2 diabetes mellitus patients using relevant keywords and their combinations. Selected studies were those conducted on patients taking metformin with no vitamin B12 supplement. Nineteen studies (fifteen observational studies and four randomized controlled trials) met the inclusion criteria. These studies were assessed for design, setting, study population, and overall quality.
RESULTS
There is a positive correlation between metformin intake and vitamin B12 deficiency. This has been accompanied by increased homocysteine and decreased folate levels. Despite the refuting of the findings, most studies showed that higher doses of metformin were strongly associated with lower vitamin B12 levels, while the duration of treatment was not.
CONCLUSION
Regular measurement of vitamin B12 levels during long-term metformin treatment is recommended. A clear policy should be in place to illuminate the importance of this screening in preventing vitamin B12 deficiency complications. Taking therapeutic supplements or injections of vitamin B12 along with a vitamin B12-rich diet may decrease the incidence of its deficiency in diabetic patients taking metformin.
Identifiants
pubmed: 35440313
pii: CDR-EPUB-122632
doi: 10.2174/1573399818666220418080959
doi:
Substances chimiques
Metformin
9100L32L2N
Hypoglycemic Agents
0
Vitamin B 12
P6YC3EG204
Types de publication
Systematic Review
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
e180422203716Informations de copyright
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