Short answer: Both are unapproved peptides with mostly animal and cell evidence. BPC-157 has 3 small human studies with 30 people in total.1 GHK-Cu is a copper-bound tripeptide found in human plasma;2 its human research is mostly small trials of skin creams, not injections.3 FDA has moved both, GHK-Cu for injection only, to its "nominated but withdrawn" compounding list.4
| BPC-157 | GHK-Cu | |
|---|---|---|
| What it is | Synthetic 15-amino-acid peptide based on a gastric protein fragment | Copper complex of the tripeptide glycyl-histidyl-lysine, present in human plasma, saliva and urine2 |
| Approval status | Not FDA approved | Not FDA approved as a drug; used in cosmetic products2 |
| Human studies | 3 small uncontrolled studies, 30 people in total1 | Mostly small trials of facial cosmetic creams3 |
| Main human route | Injection (knee, bladder wall, IV)1 | On the skin3 |
| Example result | Pilot studies without control groups; very low certainty1 | After laser resurfacing (13 patients): no objective difference vs regimen without GHK-Cu5 |
| Half-life | Under 30 minutes in rats and dogs; no human value6 | No published human value |
| FDA compounding status | Nominated but withdrawn4 | Nominated but withdrawn, for injectable routes4 |
| FDA advisory committee 2026 | Reviewed July 2026 (ulcerative colitis use)7 | Not on the July 2026 agenda7 |
| Sport | WADA S0, named8 | Not named on the 2026 List8 |
GHK is present in human plasma, saliva and urine, and its levels fall with age.2 Most of the research is in cells and animals. A 2026 systematic review called the human literature "thin and fragmented": most randomized trials are small and test facial cosmetic creams.3 The same review notes that about 35% of the primary GHK-Cu literature includes one research group with long-standing commercial interests in the field.3 In one controlled study after CO2 laser resurfacing (13 patients), skin products with GHK-Cu did not improve redness, wrinkles or skin quality on objective measures, though patients rated their skin better.5 We found no published human trials of injected GHK-Cu.
A 2026 systematic review found 3 human studies with 30 people: a knee pain chart review, a 12-person bladder pilot and a 2-person IV safety pilot, none with a control group, and rated certainty very low.1 A 2025 scoping review called human data "extremely limited."9 More detail is in BPC-157 vs TB-500: what does the evidence actually show?.
Both were on FDA's Category 2 compounding list and are now on its "nominated but withdrawn" list, because the nominators withdrew them. For injected GHK-Cu, FDA cites immunogenicity risk from aggregation and impurities and limited human data. For BPC-157, it cites immunogenicity risk and little safety information.4 FDA's advisory committee discussed BPC-157 in July 2026; its vote is non-binding.7