Timeline: High-dose results won't be available until 2028+, well after standard-dose approval
Interestingly, in hypothalamic explants, NaHS did not affect the physiological secretion of corticotropin-releasing hormone (CRH) but could inhibit the release of CRH stimulated by KCl (75)
In general, though, these injections last about a week or two
Related: Does Mesotherapy Really Work, and How Long Does It Last
Conditions such as atrophic gastritis (thinning of the stomach lining), Pernicious anemia (which makes it harder for your body to absorb Vitamin B12), Intestinal diseases such as crohns disease, celiac disease, bacterial growth and immune system disorders such as Graves disease or lupus can lead to Vitamin B12 deficiency in the body