A normal level is 400 pg/mL or higher
Conservative protocols start around 50100 mg per injection a few times per week
FDA staff's own briefing document, posted publicly ahead of the meeting as part of the docket, proposes that TB-500 (free base) and TB-500 acetate not be added to the list, citing incomplete physicochemical characterization, a lack of evidence of effectiveness for wound healing (including an in-vitro fibroblast study in which TB-500 reportedly did not induce wound healing), and insufficient nonclinical and clinical safety data
For individuals with low B12 levels or those who have difficulty absorbing B12, more frequent injections may be necessary to maintain optimal levels
Lastly, positional constraints were applied only to the protein backbone alpha carbons for a further 20 ns
Capsules may appeal to patients who want convenience, while injections are often discussed for more direct delivery