Tag: Side effects of b12

While vitamin B12 deficiency is a well-known health concern, causing issues from fatigue to nerve damage, a much less common but still relevant question is about the potential toxicity of this essential nutrient. The good news is that, because vitamin B12 is water-soluble, excess amounts are typically excreted by the body, making toxicity from food sources almost impossible. However, high-dose supplementation, particularly via injections, can lead to elevated blood levels and potential side effects.

Vitamin B12 is a water-soluble vitamin, which means that excess amounts are typically excreted through urine rather than building up to toxic levels. However, while a true overdose is rare, taking too much B12 through high-dose supplements or injections can still lead to unpleasant side effects for some individuals.

Over 40 percent of the world's population may have suboptimal B12 levels, which can lead to fatigue and other health issues. This common concern has led many to question if the reverse is possible: Can too much vitamin B12 be toxic? The answer is more complex than a simple yes or no.