4,5 Dietary insufficiency, pernicious anemia (i.e., an autoimmune process that reduces available intrinsic factor and subsequent absorption of vitamin B 12 1,2,6,7 ), and long-term use of metformin or acid-suppressing medications have been implicated in B 12 deficiency
What happens if you take Vitamin B complex injections too frequently
Retrieved June 10, 2025, from U.S
Many wellness centers, med spas, and functional medicine clinics offer B12 injections as part of a broader wellness package
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