Tag: B12 injection risks

According to the National Institutes of Health, vitamin B12 is generally considered safe, even at high doses, because the body does not store excess amounts. However, taking too much vitamin B12 through high-dose supplements or injections can lead to unpleasant side effects and, in rare cases, indicate serious underlying medical conditions.

While vitamin B12 is essential for health, its water-soluble nature means the body readily excretes excess amounts through urine, making true toxicity uncommon. However, very high doses, especially from injections, can lead to adverse side effects. Can there be vitamin B12 toxicity from extreme supplementation?