In most cases, the FDA said there was not ample testing or evidence to prove the peptides were safe or effective for use in humans
Other Ways to Supplement With Vitamin B12 If blood tests indicate that youre dealing with a vitamin B12 deficiency and you arent a fan of needles, you have a few ways to up your intake
doi:10.1056/NEJMcp1113996 2Socha DS, DeSouza SI, Flagg A, Sekeres M, Rogers HJ
Reconstitute a 5 mg vial with 2 mL bacteriostatic water (so 0.1 mL = 250 mcg), refrigerate, and inject at the same time daily for consistency
Undark also emailed several of his co-authors and officials at the University of Zagreb School of Medicine, but was ultimately unable to conduct an on-the-record interview with him or a team member