Vitamin B12 itself is not inherently dangerous; in fact, it is essential for various bodily
functions, including red blood cell formation, neurological function, and DNA synthesis.
However, there are a few contexts in which vitamin B12 can be considered problematic:
Deficiency Risks: A deficiency in vitamin B12 can lead to serious health issues, including
anemia, neurological problems, and cognitive decline. Those at risk include vegetarians,
vegans, and older adults who may have absorption issues.
Excessive Supplementation: While B12 is water-soluble and excess amounts are typically
excreted through urine, extremely high doses˙usually from injections or supplements˙
can lead to complications in certain individuals, particularly those with specific health
conditions (e.g., certain types of kidney disease).
Interactions with Medications: High doses of vitamin B12 may interact with certain
medications, such as those for diabetes (metformin) or proton pump inhibitors, potentially affecting their efficacy or leading to complications.
Underlying Conditions: In people with certain medical conditions, such as Leber's disease
(a hereditary optic neuropathy), high levels of B12 can exacerbate symptoms or lead to
complications.
In general, while vitamin B12 is crucial for health, it's important to maintain an
appropriate balance and consult healthcare providers for advice on supplementation,
especially for those with dietary restrictions or health concerns.
Full story:
https://www.quora.com/Why-is-vitamin-B12-so-dangerous
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