This dual preservation creates a unique metabolic environment where cells can simultaneously maintain high energy production capacity and robust epigenetic regulation a combination that typically requires careful balance between competing metabolic demands
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
Some patients may experience a transient increase in acne or rosacea-like skin reactions, thought to be related to the effects of vitamin B12 on skin bacteria, though this is uncommon and typically mild
However, it does come in higher concentrations, so always be aware of what you have if giving at home
see our full TB-500 dosage guide for the companion protocol
How long until I feel the energy boost from a B12 injection
