If you are comparing ingredient choices for broader wellness support, the Healthy Aging Supplements collection is a useful starting point
Most commercial topical products contain GHK-Cu at concentrations between 0.05% and 2%
What Is B12 Deficiency
O., Eden, S., Kvist, O., Isaksson, O
DES(1-3) IGF-1: mechanism and evidence base DES(1-3) IGF-1 (also written Des(1-3)-IGF-1 or simply Des-IGF-1) is a truncated form of IGF-1 from which the first three N-terminal amino acids glutamic acid, proline, and threonine are removed
This category is defined as: "Any pharmacological substance which is not addressed by any of the subsequent sections of the List and with no current approval by any governmental regulatory health authority for human therapeutic use (e.g