The original illustration gives these research subjects memorable roles: a coordinator and a construction crew. It is a teaching metaphor for different lines of tissue-repair research.
BPC-157
Most musculoskeletal evidence comes from preclinical research.
TB-500 / thymosin β4
Actin and cell-migration research informs the “construction crew” metaphor.
The boundary
Separate mechanism stories do not demonstrate a benefit from combining them in people.
A BPC-157 systematic review found 35 preclinical studies and one clinical study in its included musculoskeletal literature. Thymosin β4 biology does not establish the clinical effect of TB-500 or the combination.
GeneTune