It never has been, and it is unlikely to be, because FDA approval requires hundreds of millions of dollars in clinical trial investment that no compounding pharmacy can justify for a generic combination
Freezing bacteriostatic water
Vial-to-vial purity, sterility, and accuracy of stated mass vary by supplier
Dermal Healing Acceleration Pre-Clinical Models & Phase 2 Trials (PubMed, 2012) A review of Thymosin Beta-4s pre-clinical and clinical dermal healing evidence published on PubMed confirmed that TB4 accelerated dermal healing of full-thickness punch wounds across a wide range of animal models including normal rats and mice, steroid-treated rats, diabetic mice, and aged mice
In short, the standard test and reference range cannot tell you if your B12 levels are truly healthy
For US and the rest of the world, orders take between 7 and 10 working days.