GHK Basic (Tripeptide-1) (200mg)

GHK Basic Peptide

GHK is an endogenous copper peptide that occurs in the tripeptide glycyl-L-histidyl-L-lysine. It has two variants — GHK with or without Cu (Copper). GHK appears to have a strong affinity for copper (II), and it is synthesized from plasma, although it has been isolated in other areas. Endogenous GHK production is considered to decline over time. ^[1]

In cases of injury, GHK may be released from tissue cells. That may be because GHK is present in various proteins that get broken down via hydrolysis during injury. For example, studies suggest that GHK is present in the “alpha 2(I) chain of type I collagen”, which “suggests that the tripeptide might be liberated by proteases at the site of a wound and exert in situ healing.” ^[2] GHK peptide may also be released from the breakdown of another extracellular matrix-binding protein involved in regulating cell shape and proliferation, called SPARC (Secreted Protein, Acidic, and Rich in Cysteine). GHK is found in tissues undergoing remodeling, such as during the process of angiogenesis.^[3]

When GHK is released from the breakdown of proteins like collagen and SPARC, this signaling appears to trigger the fibroblasts to begin synthesizing new collagen and other structural proteins in the skin structure and connective tissues like elastin and glycosaminoglycan. Further, this copper-binding peptide appears to affect genes that control recuperative responses to injury and stress. Its functions appear to include the following: tissue remodeling, anti-inflammatory response, pain perception inhibition, nootropic, anti-cancer action, blood vessel growth, and nerve outgrowth.

Specifications

Molecular Formula: C₁₄H₂₄N₆O₄
Molecular Weight: 340.4 g/mol
Synonyms: NSC661251, NSC-661251

GHK and GHK-Cu

GHK carries a sequence inherent to the SPARC protein and collagen molecules. Copper, by contrast, is a transitional element of fundamental importance to organisms with cell membranes — from microorganisms upward. Through its conversion from oxidized Cu(II) to reduced Cu(I), it is considered a vital cofactor in a range of biochemical reactions involving electron transfer. This capacity for oxidation state change may represent an advantage, as numerous enzymes appear to utilize it in catalyzing critical biochemical processes including detoxification, blood clotting, cellular respiration, antioxidant defense, and connective tissue regeneration.[2] Copper also appears to play a vital role in iron metabolism and embryonic development, potentially essential for a wide range of metabolic reactions occurring during fetal development, oxygenation, and related biological processes.

GHK Peptide and Cancer Cells

Tumor suppressor genes, anti-oncogenes, growth regulatory genes, and DNA repair genes are considered essential in cancer cell suppression and apoptosis. Following research by Hong et al., the copper-binding peptide has been proposed to be associated with wound healing and skin structure remodeling.[4] In one study, GHK alongside another molecule appeared to reverse oncogene expression profiles in research models, with researchers suggesting that “Gly-His-Lys and securinine [may] reverse the differential expressions of these genes significantly, suggesting that they have combinatorial [actions].”

GHK Peptide and Tissue Repair

The endogenously occurring GHK molecule is considered to play an important role in damaged tissue repair. Endogenous copper peptides are similarly proposed to be significant, potentially accelerating the production of elastin and collagen proteins while appearing to support the production of glycosaminoglycans and hyaluronic acid — compounds associated with moisture retention. Introduction of synthetically developed copper peptide appears to support blood flow to areas of follicle growth, potentially supporting hair follicle development.

According to Campbell et al., GHK appears to support the production of TGF-beta and related molecules that initiate the repair process. The copper peptide, in conjunction with TGF-beta, may help reset fibroblast gene expression in COPD research models. Campbell et al. also noted the “need for additional studies to examine the mechanisms by which TGF-beta and GHK each reverse the gene-expression signature of emphysematous destruction and the [impact] of this reversal on disease progression.”[5]

GHK Peptide and DNA Repair

DNA damage begins to accumulate with the onset of cellular aging. GHK has been investigated for its potential to reset the activity of DNA repair genes, potentially attenuating physiological decline.[6] Studies in this area are ongoing.

GHK Peptide and Antioxidant Characteristics

GHK appears to activate 14 antioxidant genes while potentially suppressing two pro-oxidant genes. Pickart et al. propose that the GHK tripeptide may exert protective effects against oxidative stress and free radicals,[7] with active radicals recognized as major contributors to epidermal tissue wrinkling, photoaging, and UV-associated damage.

Research suggests GHK may play a role in neutralizing harmful free radicals generated during lipid peroxidation — a degradation process particularly pronounced under UV light exposure.[8] Specific radicals potentially affected include 4-hydroxynoneal, acrolein, and malondialdehyde, all considered to contribute to cellular damage.

GHK Peptide and Inflammation

The antioxidant properties of GHK may extend to various inflammation models. Evidence suggests GHK may interfere with mechanisms of oxidative stress and inflammation — including iron release from ferritin, a protein complex involved in iron storage — potentially attenuating lipid peroxidation. Studies propose that GHK may reduce iron complex formation within damaged tissues, potentially lowering inflammation levels.[9]

GHK is hypothesized to bind to ferritin channels, potentially reducing iron release by as much as 87% — a mechanism that may help mitigate further oxidative damage and inflammation in compromised tissues. In animal models, GHK has been observed to potentially suppress lung tissue inflammation induced by lipopolysaccharides — a bacterial cell wall component — through inhibition of NF-kB and p38 MAPK signaling pathway activation, pathways understood to promote inflammatory responses.[10] This action may also reduce the production of pro-inflammatory cytokines including TNF-1 and IL-6. Further studies suggest GHK may exert an inhibitory influence on oxidative stress in epithelial cells by potentially upregulating expression of Nrf2 — a key regulatory protein governing antioxidant protein expression.[11] The antioxidant activity of GHK may be particularly pronounced relative to other endogenous peptides such as carnosine and reduced glutathione, especially in its proposed capacity to counteract hydroxyl radicals in cell cultures.[12]

GHK Peptide and the Ubiquitin/Proteasome System (UPS)

The UPS is considered responsible for eliminating damaged proteins. GHK appears to stimulate gene expression in 41 UPS-related genes while suppressing only 1, with UPS activity appearing to reduce age-related cellular decline in experimental models.[13]

GHK Peptide and Epidermal Tissue Recovery

A study examining diabetic ulcer models suggested GHK may produce a more pronounced impact on wound closure than a control compound, with ulcer infections observed in only 7% of GHK-exposed cases compared to 34% in the control group.[14] A separate ulcer investigation reported that wounds exposed to GHK may show increased neutrophil counts — cells essential to immune response — and greater blood vessel density relative to controls.[15]

Researchers speculated that GHK may potentially accelerate wound healing and promote granulation tissue formation — composed of new connective tissue and capillaries emerging at the wound surface — potentially linked to upregulation of antioxidant enzymes, though this remains uncertain. Support for vascular function, critical for nutrient and oxygen delivery during tissue regeneration, was also noted.

A further study assessed GHK’s influence on ischemic open wound healing,[16] with findings indicating GHK-exposed wounds may have experienced greater wound area reduction than controls, alongside lower levels of pro-inflammatory markers including tumor necrosis factor-alpha (TNF-alpha), matrix metalloproteinase-2 (MMP-2), and matrix metalloproteinase-9 (MMP-9) — all involved in inflammation and tissue remodeling. This suggests GHK may potentially attenuate inflammation and tissue breakdown in ischemic wound environments. In follow-up studies, wounds exposed to biotinylated GHK films reportedly achieved near-complete closure at 99.39%, compared to 69.49% with control films.[17]

GHK-exposed wounds additionally appeared to contain elevated levels of glutathione and ascorbic acid — recognized antioxidants involved in tissue repair — alongside a possible increase in epithelialization, potential stimulation of collagen production considered critical for skin structure maintenance, fibroblast activation, and a potential increase in mast cell activity associated with inflammatory processes.

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