KLOW is a vendor name for a mixture of four research peptides: KPV, GHK-Cu, BPC-157 and TB-500. It is GLOW with KPV, a three-residue fragment of alpha-MSH studied in inflammation models, added.
There is no published study of the four together. The science is in the four component entries.
4
≈ 3053 g/mol total
None
Contains prohibited
What is in it
A blend is a mixture of separate peptides in one vial. The name is a vendor label, not a chemical name, and the ratio varies between suppliers. The table lists each component and links to its own entry, where the identity data and references live.
| Component | Residues | Avg mass | Entry | What the studies measured | WADA |
|---|---|---|---|---|---|
| KPV | 3 | 342.4 g/mol | 0006 | Inflammation models in cells and mice | S0 by default |
| GHK-Cu | 3 | 401.9 g/mol | 0003 | Skin and wound models in cells and animals; small human skin studies | Not named |
| BPC-157 | 15 | 1419.5 g/mol | 0001 | Gut, tendon, muscle and vessel models in rats; a few small human reports | S0, prohibited |
| TB-500 | 7 | 889.0 g/mol | 0002 | Mostly studies of the parent protein thymosin beta-4; detection work on the fragment | S2.3, prohibited |
KLOW is GLOW with KPV added. Combined mass is the sum of the four components.
What the studies measured
There is no published study of KLOW as a mixture. Everything known comes from studies of the components on their own, almost all in animals or cells. The rows below summarise those entries; the evidence for each is in its own entry.
| Component | Model | Main lines of research | Human data |
|---|---|---|---|
| KPV | Cells, mice | Inflammation in gut and skin models | None |
| GHK-Cu | Cells, animals, people | Wound closure, collagen, skin appearance | Small cosmetic studies |
| BPC-157 | Rats, cell cultures | Gut, tendon, muscle and vessel repair | A few small uncontrolled reports |
| TB-500 | Mostly the parent protein, thymosin beta-4 | Wound, heart and eye repair for the protein; detection for the fragment | None for the fragment |
Regulatory and sport status
As of this revision. General information, not legal advice.
| Where | Status |
|---|---|
| UK, EU, US | No component is a licensed medicine. None is a controlled drug in the UK. May not be supplied or promoted for human use. |
| Sport | BPC-157 (class S0) and TB-500 (class S2.3) are prohibited at all times, so a blend containing them is prohibited. KPV is unapproved and falls under S0 by default; GHK-Cu is not named.2 |
Open questions
- Whether the components interact at all. No study has tested them together, so any claim about the mixture rests on separate studies.
- How a certificate should read for a blend: purity by HPLC gives one peak per peptide, and identity by mass spectrometry must confirm each one. Ask any supplier for all of them.
- The ratio. Different suppliers use different amounts of each peptide under the same name.
Common questions
What is in KLOW?
KPV, GHK-Cu, BPC-157 and TB-500 in one vial. It is GLOW plus KPV.
What does the K add?
KPV, the last three residues of alpha-MSH, studied in inflammation models in cells and mice. It has no human data.
Has KLOW been studied?
No. There is no published study of the mixture.
Is KLOW banned in sport?
Yes, in effect. BPC-157 and TB-500 are prohibited at all times, and KPV is unapproved.
See also
References
- Peptidarium Library. The component entries linked above, each with its own reference list.
- World Anti-Doping Agency. The 2026 Prohibited List (in force 1 January 2026). wada-ama.org Classes S0 and S2.3.
Peptidarium Library. KLOW (entry 0022), revision 1.0, 2 November 2026. peptidarium.com/library/klow
Revision history
| Rev | Date | Change | By |
|---|---|---|---|
| 1.0 | 2 Nov 2026 | Entry created. | [Scientific editor] |
Spotted an error or a missing paper? Send a correction. Every change is logged here.