Can too much b12 cause hair loss to get worse?
Answer I have never seen or read of hair loss due Vit B12 excess. Here is a website that states there are no toxic effects due to Vit B12. You must have read the recommendation for taking B12 from someone other than me as I have never seen hair loss as a result of any level of B12. The B12 may be low coincidentally with some other cause of hair loss including a low serum ferritin. http://www.b12patch.com/blog/vitamin-b12-2007-02-06-vitamin-b-12-toxicity.html Vitamin B12 is the only vitamin that is not known to have toxic effects even when taken in large doses.
