A long half-life of roughly 6 days makes a single weekly subcutaneous injection practical, while gradual titration keeps tolerability high from the first dose [1] [4]
Its unapproved status with the FDA means there is no conclusive consumption measure
PubMed 22962027 TB-4 Phase 1 human safety first-in-human randomized, double-blind, single- and multiple-dose Phase 1 of recombinant human thymosin 4 in healthy volunteers, no serious adverse events: PubMed 34346165
Therefore, adding more B12 to your diet wont prevent you from losing your hair [4]
Peptide therapy with DAC is an exception, with a half-life of approximately 68 days, allowing for less frequent dosing
Growth hormone-releasing peptides like sermorelin and CJC-1295 take a different approach: they stimulate the pituitary gland to produce and release more of the bodys own growth hormone