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Non-surgical weight loss options are becoming more common for obese individuals

Vitamin B12 plays essential roles in red blood cell formation, neurological function, and DNA synthesis

Gastric surgery patients People who've had bariatric surgery procedures have reduced B12 absorption and increased risk of deficiency

10.1001/archotol.1996.01890160065012 149 WangJ

Last reviewed: May 12, 2026 Last updated: May 12, 2026 Written by: Jay Hastings , CEO of PlexusDx Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations