Because B12 is water-soluble, the NIH Office of Dietary Supplements notes that no tolerable upper intake level has been established excess B12 is excreted by the body rather than accumulating to toxic levels
Examining B12 Shots & B12 Injections: Investigating the Definite Relationship Between B12 Injections and Weight Loss, Alongside Alternative Approaches
Without enough of it, your body starts making red blood cells that are too large and structurally abnormal a condition called megaloblastic anemia
[131] [132] Species from the following genera and the following individual species are known to synthesize B 12 : Propionibacterium shermanii , Pseudomonas denitrificans , Streptomyces griseus , Acetobacterium , Aerobacter , Agrobacterium , Alcaligenes , Azotobacter , Bacillus , Clostridium , Corynebacterium , Flavobacterium , Lactobacillus , Micromonospora , Mycobacterium , Nocardia , Proteus , Rhizobium , Salmonella , Serratia , Streptococcus and Xanthomonas
The peptide is safe