Injectable vitamin B12 allows direct absorption and is commonly used by individuals with low or deficient B12 levels or those seeking an alternative to oral supplementation
Thyroid concerns arose during drug development due to C-cell hyperplasia and medullary thyroid carcinoma seen in rodent studies
B12 shots are available in multiple forms, including cyanocobalamin , which is the synthetic version, and methylcobalamin , which is a naturally occurring form
Patients with tingling, numbness, brain fog, or neuropathy-type symptoms who may need active-form support
The luteal phase is usually between 12-14 days
Mouth Pain and Inflammation A deficiency of vitamin B12 or other nutrients can cause inflammation and pain of the tongue (the medical term is glossitis)