Repair and regeneration

The Wolverine and GLOW Stacks

BPC-157, TB-500, and GHK-Cu are three peptides often discussed for tissue repair. Each seems to work in a different way. Almost all of the evidence comes from cell and animal studies, and controlled human trials are scarce or missing[1][2]. None is FDA approved. The stacks below are built on the idea that combining them could support healing in several ways at once.

BPC-157Body Protection Compound, 15 amino acids

BPC-157 is a lab-made peptide based on part of a protein found in human gastric juice, the digestive fluid in the stomach. The research group that developed it reports that it stays stable in gastric juice for more than 24 hours[3][4]. In animal studies, it has improved healing of tendons, ligaments, muscle, and bone[1]. It appears to boost pathways that grow new blood vessels and to lower some inflammation signals[1].

Animal studies have given it by injection and by mouth, and its developers report effects both near and away from the injury site[3][1]. Its gut research covers ulcers and colitis in animals, plus an early human trial in ulcerative colitis reported by the developers[4].

Human evidence is very thin. A 2025 systematic review found 35 animal studies and only 1 human study, a small look-back report on knee injections for knee pain[1]. In rats and dogs, injected BPC-157 broke down quickly, with a half-life under 30 minutes[5]. That study tested only injections into a vein or a muscle[5].

What animal studies have looked at:
  • Tendon and ligament healing[1]
  • Muscle healing[1]
  • Bone healing[1]
  • Gut lining protection[4]
  • New blood vessel growth, called angiogenesis[1]
  • Lower inflammation signals[1]
Studies used: 250 to 500 mcg/day (subcutaneous or oral)We could not find a published human study that used this amount, and there are no human dosing trials. This is not a dosing recommendation.
TB-500Thymosin beta-4 fragment

TB-500 is the name used for a short, lab-made piece of thymosin beta-4 (the 7-amino-acid stretch LKKTETQ)[2]. Thymosin beta-4 itself is a 43-amino-acid peptide that platelets and other cells release after an injury[6][7]. Most of the research below is on full-length thymosin beta-4, not on the TB-500 fragment.

Thymosin beta-4 binds actin, a protein cells use to move, and helps repair cells migrate toward damaged tissue[6]. It also lowers inflammation and scarring in lab and animal studies[6]. In mice, it improved heart cell survival and heart function after a heart attack[8]. In rats and mice, it sped up hair growth[7]. It has also been studied for skin wounds, eye injuries, and brain injury[6].

You may see claims that TB-500 spreads through the whole body after injection and reaches hard-to-reach injuries. Published human data don't support that. FDA reports it has not found any human exposure data for the TB-500 fragment[2].

What lab and animal studies of thymosin beta-4 have looked at:
  • Cell movement toward injury sites[6]
  • Heart repair after a heart attack in mice[8]
  • Lower inflammation and scarring[6]
  • Hair growth in rodents[7]
  • Wound healing[6]
Studies used: 2 to 2.5 mg 2×/week (subcutaneous)We could not find a published human study that used this amount, and there are no human dosing trials. This is not a dosing recommendation.
GHK-Cu (copper peptide)Glycine-histidine-lysine bound to copper

GHK is a small peptide made of three amino acids that binds copper. It occurs naturally in human blood plasma[9]. In a rat wound study, injected GHK-Cu increased the amount of new wound tissue, including type I collagen and glycosaminoglycans (building blocks of skin and connective tissue)[10]. In rat skin cells called fibroblasts, it raised production of decorin, another connective-tissue molecule[10].

Researchers have also looked at its effect on genes. One team's computer analysis predicted that GHK could reverse a gene pattern linked to lung damage. In the lab, GHK restored normal collagen remodeling in lung cells from people with COPD[9]. These are cell-culture findings, not proof of effects in the body.

What lab and animal studies have looked at:
  • Collagen production in healing wounds in rats[10]
  • Less lung inflammation and scarring in a mouse model of silicosis, a dust-caused lung disease[11]
  • Less oxidative stress in mouse immune cells in the same study[11]
  • Collagen remodeling in lung cells from people with COPD[9]
Studies used: 1 to 3 mg/day subcutaneousWe could not find a published human study that used this amount, and there are no human dosing trials. This is not a dosing recommendation.

For education only

The Wolverine Stack

BPC-157 + TB-500

The Wolverine stack is a nickname for using BPC-157 and TB-500 together, named after a comic-book character known for fast healing. The idea is that the two work in different ways. In animal studies, BPC-157 boosts blood vessel growth and growth signals near an injury[1]. Thymosin beta-4 helps repair cells move into damaged tissue[6]. In theory, one helps build the blood supply and the other helps bring in the workers. We did not find published trials testing this exact combination.

Areas the combination is meant to target (not tested as a pair):
  • Tendon recovery
  • Ligament repair
  • Muscle injury healing
  • Less pain and swelling
  • Joint health
Why they might work together, in theory

BPC-157 is often described as acting mainly near an injury, and TB-500 as acting more widely. Neither idea has been well tested in people. Because their proposed mechanisms are different, the idea is that their effects would add up instead of overlapping. That has not been shown.

The GLOW Stack

BPC-157 + TB-500 + GHK-Cu

GLOW adds GHK-Cu to the Wolverine pair. The idea is to widen the focus from injury repair toward skin and connective tissue quality, since GHK-Cu is studied for collagen and wound repair[10]. We did not find trials testing this three-way combination.

Areas the combination is meant to target (not tested together):
  • Everything the Wolverine stack targets
  • Collagen
  • Skin texture and elasticity
  • Oxidative stress, which is cell damage from unstable oxygen molecules
  • Connective tissue remodeling
The thinking behind the three-way combination

BPC-157 is studied for blood supply, through new blood vessel growth[1]. Thymosin beta-4 is studied for moving repair cells into place[6]. GHK-Cu is studied for building the extracellular matrix, the collagen and other material that holds tissue together[10]. Those are three main parts of tissue repair: blood supply, repair cells, and structure. Whether combining the peptides helps people is unknown.

Sources

The numbers in brackets on this page point to the sources below. Each one links to the original study, drug label, or government page.

  1. 1.

    Vasireddi N, et al. (2025). Emerging Use of BPC-157 in Orthopaedic Sports Medicine: A Systematic Review (opens in a new tab). HSS Journal. Back to citation

  2. 2.

    U.S. Food and Drug Administration (2026). Certain Bulk Drug Substances for Use in Compounding that May Present Significant Safety Risks (opens in a new tab). U.S. Food and Drug Administration. Note: As of FDA's 04/22/2026 update, BPC-157, TB-500, and GHK-Cu (for injection) appear under 'Bulk drug substances nominated but withdrawn.' Back to citation

  3. 3.

    Sikiric P, et al. (2024). The Stable Gastric Pentadecapeptide BPC 157 Pleiotropic Beneficial Activity and Its Possible Relations with Neurotransmitter Activity (opens in a new tab). Pharmaceuticals. Back to citation

  4. 4.

    Sikiric P, et al. (2024). New studies with stable gastric pentadecapeptide protecting gastrointestinal tract. significance of counteraction of vascular and multiorgan failure of occlusion/occlusion-like syndrome in cytoprotection/organoprotection (opens in a new tab). Inflammopharmacology. Back to citation

  5. 5.

    He L, et al. (2022). Pharmacokinetics, distribution, metabolism, and excretion of body-protective compound 157, a potential drug for treating various wounds, in rats and dogs (opens in a new tab). Frontiers in Pharmacology. Back to citation

  6. 6.

    Goldstein AL, et al. (2012). Thymosin β4: a multi-functional regenerative peptide. Basic properties and clinical applications (opens in a new tab). Expert Opinion on Biological Therapy. Back to citation

  7. 7.

    Philp D, et al. (2004). Thymosin beta4 increases hair growth by activation of hair follicle stem cells (opens in a new tab). The FASEB Journal. Back to citation

  8. 8.

    Bock-Marquette I, et al. (2004). Thymosin beta4 activates integrin-linked kinase and promotes cardiac cell migration, survival and cardiac repair (opens in a new tab). Nature. Back to citation

  9. 9.

    Campbell JD, et al. (2012). A gene expression signature of emphysema-related lung destruction and its reversal by the tripeptide GHK (opens in a new tab). Genome Medicine. Note: The authors report that Boston University holds intellectual property related to this research. Back to citation

  10. 10.

    Siméon A, et al. (2000). Expression of glycosaminoglycans and small proteoglycans in wounds: modulation by the tripeptide-copper complex glycyl-L-histidyl-L-lysine-Cu(2+) (opens in a new tab). Journal of Investigative Dermatology. Back to citation

  11. 11.

    Bian Y, et al. (2024). The glycyl-l-histidyl-l-lysine-Cu2+ tripeptide complex attenuates lung inflammation and fibrosis in silicosis by targeting peroxiredoxin 6 (opens in a new tab). Redox Biology. Back to citation