B12 Safety & Side Effects
Our assessment
Based on the data provided, vitamin B12 has not been shown to cause any harm, even at high doses. This makes its overall safety profile exceptionally favorable. The data does not specify a maximum tolerable upper intake level or any toxicity concerns NIH ODS ↗.
Safety profile
Data not available. The provided data does not contain specific FDA adverse event reports or report counts for vitamin B12. No side effects were listed in the provided information FDA FAERS ↗.
How it works
Data not available. The provided information does not include a description of the mechanism of action for vitamin B12 NIH ODS ↗.
Our recommendation
While vitamin B12 is considered very safe, be aware that it can interact with certain medications. The data confirms that vitamin B12 supplements can interact or interfere with some medicines. Individuals taking prescription medications should consult with a healthcare provider before starting supplementation NIH ODS ↗.
AI-assisted analysis. Data sourced from NIH ODS and FDA.
Safety Overview
Vitamin B12 has not been shown to cause any harm, even at high doses.
Drug Interactions
Yes. Vitamin B12 supplements can interact or interfere with some medicines that you take. Here are several examples.