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Last reviewed: May 30, 2026 Last updated: May 30, 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
Medications including metformin, proton pump inhibitors, and H2-receptor antagonists may reduce absorption of B12, potentially prolonging the time to clinical improvement
Since your body only absorbs a small amount at once, excess B12 just gets flushed out
Vitamin B12, also known as cobalamin, is a molecule that isnt easily absorbed into our systems
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