GHK-Cu, BPC-157 and TB-500 (GLOW stack)
What is the GLOW stack, and does adding GHK-Cu to BPC-157 and TB-500 actually help skin and scars?
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Also searched as GLOW protocol, GLOW peptide blend, GHK-Cu BPC-157 TB-500 blend, GLOW healing stack.
GHK-Cu is a naturally occurring tripeptide bound to copper that declines with age. It is used topically for skin firmness, wrinkles and hair growth, and by injection for wound healing, skin remodeling and general tissue repair.
BPC-157 is a 15 amino acid fragment of a protective protein found in human gastric juice. People use it for tendon, ligament, muscle and gut healing, and it is one of the most widely used research peptides in the recovery space.
TB-500 is a synthetic version of the active region of thymosin beta-4, a protein found in nearly every human cell that regulates actin and cell movement. It is used for injury recovery, flexibility and general tissue repair, usually alongside BPC-157.
GLOW is a forum and vendor nickname for GHK-Cu, BPC-157 and TB-500 run together, usually for skin, scars and recovery after a cosmetic or surgical procedure. The idea is to take the Wolverine stack for soft tissue and add the copper peptide for collagen remodeling. The evidence is uneven. Topical GHK-Cu has controlled human trials for photoaged skin and wound healing. Injectable GHK-Cu has none. BPC-157 and TB-500 are supported by rodent and veterinary data, with no human trial for skin or scar outcomes. The three have never been tested together.
GHK-Cu is the fastest growing peptide search term of 2026, and most GLOW searches come down to three things: the dosage of each part, whether the copper peptide can share a vial with the other two, and how it differs from the KLOW stack. This page covers all three. It is educational only; none of these are approved for injection, and the skin trial data belongs to topical GHK-Cu, not to anything in a syringe.
Why people combine GHK-Cu, BPC-157 and TB-500
GHK-Cu stimulates fibroblasts to make collagen, elastin and glycosaminoglycans while also raising the enzymes that clear damaged collagen. That balance is why it is used for scars rather than just wounds. BPC-157 and TB-500 bring angiogenesis and cell migration, which is the earlier part of healing. The sequence makes sense on paper, and that is where the evidence for the combination stops.
People run GLOW after microneedling, laser, surgery or a hair transplant, when there is a defined wound to heal. GHK-Cu's rodent wound data and small human wound studies show faster closure and better organized collagen. TB-500's skin wound data in aged and diabetic mice points the same way. This is the use case with the most mechanistic support.
Some people inject 1 mg of GHK-Cu subcutaneously near a scar, rotating sites, rather than systemically. That mirrors how BPC-157 is used near a tendon. There is no human data for either local approach, but it is the version of GLOW that most closely follows the topical trial logic of getting the peptide to the tissue.
GHK-Cu will not do anything for a tendon or a gut lining that BPC-157 is not already doing. For an orthopedic injury with no skin component, GLOW is the Wolverine stack plus stinging injections and a copper load. The topical trials also mean that for skin appearance alone, a cream has better evidence than any of the three injected.
GLOW stack dosage and protocol
What appears in research and community protocols for each compound in the stack. Not a prescription.
| Peptide | Dosage | Frequency | Timing and route |
|---|---|---|---|
| GHK-Cu | 1 to 2 mg | once daily | subcutaneous in the abdomen or thigh, or 1 mg near a scar; many inject in the evening because it stings |
| BPC-157 | 250 to 500 mcg | once or twice daily | subcutaneous near the treated area or in the abdomen, any time of day |
| TB-500 | 2 to 2.5 mg | twice weekly for 4 to 6 weeks | subcutaneous in the abdomen, any time, site does not matter |
GLOW is usually run for 4 to 8 weeks, which matches the injectable GHK-Cu and BPC-157 cycle lengths and the TB-500 loading phase. Post-procedure runs are often shorter, starting a day or two after the procedure and ending once the wound has closed and the scar is flattening. A 2 to 4 week break follows before any repeat, partly because injectable GHK-Cu has no long term safety data and copper load is a theoretical concern.
- •GHK-Cu stings. Diluting to 2 mg per mL or lower, injecting slowly and rotating sites reduces it. Evening dosing lets people sleep through the irritation.
- •The GHK-Cu solution should be clear and blue. A colorless or cloudy vial is either plain GHK without copper or degraded.
- •Keep GHK-Cu away from topical vitamin C, which reduces the copper. Topical GHK-Cu can be layered on top of the injectable protocol once the skin barrier has closed.
- •The dosage of each compound is the same as when used alone; nobody lowers the doses because they are stacked.
Work out syringe units for any of these in the dosage calculator.
Can you mix GHK-Cu, BPC-157 and TB-500 in one syringe?
GHK-Cu is the problem child here. One side argues that its copper ion and its preferred pH of about 5 to 6.5 can degrade BPC-157 and TB-500 in a shared vial over the days it sits in the fridge, which is why the GHK-Cu page says to inject it separately and why some users report the mixed solution changing color. The other side notes that vendors sell pre-mixed GLOW blends in one vial, that no published degradation data exists either way, and that people use the blends without an obvious loss of effect. Both sides are arguing from theory and anecdote, so the cautious default is GHK-Cu in its own syringe, with BPC-157 and TB-500 free to share one; the reconstitution guide covers the volumes.
What to expect, week by week
- Week 1 to 2
GHK-Cu injection stinging, redness and bruising are expected. BPC-157 users notice less pain and swelling at the treated area. TB-500 can cause brief fatigue after the first doses.
- Week 3 to 6
Scars and wounds look flatter and less red, which is the earliest the topical GHK-Cu trials measured change. Range of motion improves if there is a soft tissue component.
- Week 8 to 12
Skin firmness, elasticity and fine line changes become visible in line with the 12 week topical trial data. Most injectable runs have ended by now, so this is where topical GHK-Cu takes over.
- Month 3 to 6
Hair changes, if any, need this long to judge. Scar remodeling continues for months after the stack ends.
Side effects and cautions
- ▲Injection site stinging, redness and bruising from GHK-Cu, very common above 2 mg per mL
- ▲Temporary nausea or a metallic taste after a GHK-Cu injection
- ▲Headache or fatigue, reported with all three compounds
- ▲Fatigue or a head rush for a few hours after larger TB-500 doses
- ▲Nausea or a warm flush shortly after a BPC-157 dose
- ▲Skin irritation or rash if topical GHK-Cu is layered on top
- ▲Discoloration of the solution if a mixed vial has degraded
- ■Wilson disease or any copper metabolism disorder, or anyone taking high dose copper. Injectable GHK-Cu adds copper on top and the compound page says to avoid it.
- ■Active or recent cancer. All three promote cell migration and vessel growth, and thymosin beta-4 is expressed in many tumor types.
- ■A fresh surgical wound without the surgeon's knowledge. Injecting near a healing incision adds infection risk and can interfere with how the wound is assessed.
- ■Tested athletes. BPC-157 and TB-500 are WADA prohibited even though GHK-Cu is not listed.
GLOW makes sense for someone healing a defined wound or scar: after surgery, a hair transplant, aggressive laser or deep microneedling, where there is both a soft tissue and a skin component to recover. It is the one scenario where all three mechanisms are plausibly in play at once. For skin appearance with no wound, it is the wrong tool. Topical GHK-Cu has controlled human trials and the injectable has none, so a cream at 0.5 to 3 percent is where the evidence sits. For a tendon or a gut problem, drop the GHK-Cu and run the Wolverine stack; the copper peptide adds stinging injections and nothing else. Anyone with a copper disorder or a cancer history has clear reason to skip it entirely. Keep GHK-Cu in its own syringe until someone publishes stability data, and treat this page as educational background rather than a protocol to follow.
GLOW stack: frequently asked
Can you mix GHK-Cu with BPC-157 and TB-500 in the same vial?
It is disputed. The copper and acidic pH of GHK-Cu may degrade the other two over time, and the compound pages say to keep it separate. Vendors sell GLOW blends anyway and users report they work. Separate syringes cost nothing and remove the question.
Is the KLOW stack better than GLOW?
Only if inflammation or the gut is part of the problem. KLOW adds KPV, an anti-inflammatory tripeptide with mouse data in colitis and skin inflammation. For a scar, a procedure or skin texture, KPV adds a fourth injection and nothing the other three are not covering. See the KLOW stack page.
What is the GLOW stack dosage?
Reported protocols use GHK-Cu at 1 to 2 mg once daily, BPC-157 at 250 to 500 mcg once or twice daily and TB-500 at 2 to 2.5 mg twice weekly. Those are the same ranges as each compound alone. The peptide dosage chart has all three side by side.
Is GLOW good after microneedling or laser?
That is the most common use. People start a day or two after the procedure and run 2 to 4 weeks, with topical GHK-Cu once the skin barrier has closed. The wound healing data is rodent plus small human topical studies, not a trial of this protocol.
Does the GLOW stack help with hair growth?
GHK-Cu and TB-500 both have mouse data on follicle stem cells, and GHK-Cu has small human trials for shedding, all topical. Injecting the stack for hair is a long detour. Topical GHK-Cu on the scalp with microneedling is the version with any support; see GHK-Cu for hair.
Should GHK-Cu be injected near the scar or in the belly?
Both are done. Local injection at 1 mg near the scar, rotating sites, follows the logic of the topical trials. Systemic dosing in the abdomen or thigh is what people use for general skin effects. Neither has human data, and local injection stings more because the tissue is already irritated. The injection sites article covers rotation.
Related reading
Soft tissue and tendon injury recovery
Healing with inflammation and gut support
Which healing peptide should you start with, and do you need both?
Guide
Guide
Safety
Guide
Gut lining repair and inflammation control
Both are gut peptides. One repairs, one calms inflammation. Which problem do you have?
Sources
- GHK peptide as a natural modulator of multiple cellular pathways in skin regeneration. BioMed Research International, 2015
- Thymosin beta 4 accelerates wound healing. Journal of Investigative Dermatology, 1999
- The promoting effect of pentadecapeptide BPC 157 on tendon healing involves tendon outgrowth, cell survival, and cell migration. Journal of Applied Physiology, 2011