s water soluble and what is not needed gets excreted out, so no
toxicity. Well, my levels were 1,131 pg/mL
and the ref ranges are 211-911, so mine is quite high.
I've read and it says supplements should do nothing to change blood and different diseases (like leukemia's, cirrhosis, hcc, and others) are associated with high b12 results, and a high result is NOT normal, unlike low b12 which is quite common.