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Civil Engineering, UCLA Last updated: July 2026 Human-researched and AI-assisted with full editorial review
Slower absorption When high doses of B12 are injected, the body can only store so much before excess is excreted
(More information) Low maternal vitamin B 12 status has been associated with an increased risk of neural tube defects (NTD), but it is not known whether vitamin B 12 supplementation could help reduce the risk of NTD
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Learn how long B12 stays good, how to extend shelf life, and what happens after the expiration date
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