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Asterwood Naturals Copper Peptides Serum Versus Sumanurica GHK-CU Repairing Serum

Asterwood Naturals Copper Peptides Serum Versus Sumanurica GHK-CU Repairing Serum This anti-aging serum is formulated around Copper Tripeptide-1 and Sodium Hyaluronate to soften the look of wrinkles and strengthen the skin barrier. This anti-aging serum is for

By Peptide Skincare & Beauty Editorial TeamPublished

Asterwood Naturals Copper Peptides Serum Versus Sumanurica GHK-CU Repairing Serum

This anti-aging serum is formulated around Copper Tripeptide-1 and Sodium Hyaluronate to soften the look of wrinkles and strengthen the skin barrier.

This anti-aging serum is formulated around Copper Gluconate and Ectoin to soften the look of wrinkles and strengthen the skin barrier.

What's inside

Key Ingredients

Benefits

Ingredients Side-by-side

Water

Pentylene Glycol

Phenylpropanol

Sodium Hyaluronate

Copper Tripeptide-1

Sodium Hydroxide

Water, Pentylene Glycol, Phenylpropanol, Sodium Hyaluronate, Copper Tripeptide-1, Sodium Hydroxide

Glycerin

Glycereth-26

Dipropylene Glycol

1,2-Hexanediol

Copper Gluconate

Hydrolyzed Sodium Hyaluronate

Ethylhexylglycerin

Trehalose

Mannitol

Ectoin

Acetyl Glucosamine

Carnosine

Tripeptide-1

Water, Glycerin, Glycereth-26, Dipropylene Glycol, 1,2-Hexanediol, Copper Gluconate, Hydrolyzed Sodium Hyaluronate, Ethylhexylglycerin, Trehalose, Mannitol, Ectoin, Acetyl Glucosamine, Carnosine, Copper Tripeptide-1, Tripeptide-1

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Alternatives

Ingredients Explained

These ingredients are found in both products.

Ingredients higher up in an ingredient list are typically present in a larger amount.

Copper Tripeptide-1 (GHK-Cu) is a skin repairing ingredient known for its ability to boost collagen, improve firmness, and support skin regeneration.

It is a complex made up of a naturally occurring peptide (glycine-histidine-lysine) and copper, an essential trace element.

While studying wound healing, researchers noticed GHK-Cu stimulated hair follicle enlargement and growth by keeping hair in its active growth phase longer. This has made it a promising ingredient for hair regrowth treatments.

Some people have reported increased facial hair. While GHK-Cu can make your hair follicles bigger, it usually doesn’t turn soft, barely-visible facial hairs into thick, dark ones.

Anecdotal reports suggest that overusing copper peptides might lead to premature aging due to excess free copper or enzyme imbalances. This claim isn’t backed by large-scale studies.

Unfortunately, there are limited human studies for this ingredient. While early results are promising, many studies are either small, in-vitro, or not rigorously controlled.

For example, there is a 1998 study that explored the effects of copper tripeptide, vitamin C, tretinoin, and melatonin on skin repair and collagen synthesis.

After one month, increased procollagen production was seen in 7 out of 10 participants using copper tripeptide (more than those using vitamin C, melatonin, or tretinoin.

While the study was exploratory, it offers early evidence that copper tripeptide may support collagen production. Larger, well-designed trials are still needed to confirm its potential and understand individual responses.

Read more about other common types of peptides here:

Water. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product.

So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation.

You'll also recognize water as that liquid we all need to stay alive. If you see this, drink a glass of water. Remember to stay hydrated!

Similar Comparisons

The reference edit

Ingredients, questions
& further reading.

Connected source records selected through this article’s public topic index.

01

Formula cabinet

Ingredients & structured notes

Ingredient index

Ingredients Explained

  1. 01These ingredients are found in both products.
  2. 02Ingredients higher up in an ingredient list are typically present in a larger amount.
  3. 031,2-Hexanediol is a synthetic liquid and another multi-functional powerhouse.
  4. 04It is a:
  5. 05Humectant, drawing moisture into the skin
  6. 06Emollient, helping to soften skin
  7. 07Solvent, dispersing and stabilizing formulas
  8. 08Preservative booster, enhancing the antimicrobial activity of other preservatives
  9. 09Glycerin (or glycerol) is a compound naturally found in your skin. It's a powerhouse humectant that pulls water into the stratum corneum.
  10. 10Topically, glycerin does several things at once:
  11. 11Your skin makes glycerin on its own (mostly from sebaceous oil breakdown) and shuttles it to your outermost layer of skin, or your epidermis, via aquaporin-3.
  12. 12Aquaporin-3 is a transporter that is essential for normal skin hydration, elasticity, and repair. Interestingly, mice lacking in AQP3 have dry and less elastic skin that can be fully corrected with glycerin.
  13. 13This ingredient is non-irritating, plays well with almost every ingredient, and works across all skin types. Typical use is anywhere between 3-10% but can go up to 79% in some leave-on products.
  14. 14Just know very high concentrations (>40%) can feel tacky in low humidity.
  15. 15Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.
  16. 16Water. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product.
  17. 17So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation.
  18. 18You'll also recognize water as that liquid we all need to stay alive. If you see this, drink a glass of water. Remember to stay hydrated!
Source · skinsort.com ⟶
02

Product index

Related product references

03

Comparison edit

Read side by side

04

Ask the journal

Related questions

01What If I Left Lyophilised GHK-Cu Out for 24 Hours at Room Temperature?

Refrigerate the vial immediately and plan to use it within the next 30 days. Expect 10–20% potency reduction. Not catastrophic, but enough to introduce variability if you're running controlled experiments. The lyophilised form is more resilient than reconstituted solution, but structural changes have begun at the molecular level even if the powder looks unchanged.

Source · realpeptides.co ⟶
02What If I Need a Dose Smaller Than 100 mcg?

Reconstitute to a lower concentration or switch to a 0.3 mL syringe with finer graduations. For doses below 100 mcg at 1 mg/mL concentration (requiring fewer than 10 ticks), measurement precision becomes difficult. The meniscus (curved surface of the liquid in the barrel) obscures the exact tick position. Reconstituting the same 5 mg vial with 10 mL instead of 5 mL yields 0.5 mg/mL, where 100 mcg requires 20 ticks (0.2 mL) instead of 10 ticks, doubling your visual precision.

Source · realpeptides.co ⟶
03What If I Use GHK-Cu Alongside Minoxidil — Do They Interfere?

No documented interference exists. GHK-Cu suppresses TGF-beta signaling while minoxidil activates potassium channels and prostaglandin synthesis. Distinct pathways with no overlapping receptor targets. Apply GHK-Cu in the morning and minoxidil in the evening to avoid formulation dilution. One caution: both compounds require consistent scalp contact time. If you apply minoxidil and immediately follow with a GHK-Cu serum, you dilute the minoxidil concentration before absorption completes. Separate applications by 8–12 hours.

Source · realpeptides.co ⟶
04What If the Vial Stopper Looks Damaged After Multiple Withdrawals?

Discard the vial if you observe visible coring (small rubber fragments floating in the solution), stopper deformation that prevents a clean seal after needle removal, or more than 20 punctures in the same stopper. Rubber particulate in the solution is a hard stop. It cannot be filtered out with standard insulin syringes. Most research-grade vials tolerate 15–20 withdrawals before stopper integrity becomes questionable.

Source · realpeptides.co ⟶
05What If You're Stacking GHK-Cu With Multiple Peptides — Do You Reduce the Dose?

No. Maintain full therapeutic doses of each peptide in the stack unless pharmacokinetic data suggests receptor saturation. GHK-Cu's copper-transport mechanism doesn't compete for binding sites with growth hormone secretagogues, angiogenic peptides, or immune modulators, so dose reduction based solely on stack size isn't necessary. The exception: if you're stacking three or more peptides that all target overlapping inflammatory pathways (e.g., GHK-Cu + BPC-157 + TB-500 + Thymosin Alpha-1), monitor for excessive immune suppression or delayed acute-phase response in injury models. In practice, researchers stack GHK-Cu at 2–3mg daily with two or even three complementary peptides without adverse interaction. What does require adjustment is injection-site rotation. Administering four peptides into the same subcutaneous site risks localized tissue irritation, reduced absorption, and depot formation. Rotate sites across abdomen, thighs, and deltoids to maintain consistent bioavailability across all compounds.

Source · realpeptides.co ⟶
05

Source shelf

Research & excerpts

Research note

GHK-Cu Studied Scalp Inflammation — Research Insights

Research from institutions including the Skin Research Institute has documented GHK-Cu's ability to reduce inflammatory markers in scalp tissue by up to 47% within 28 days of topical application. The copper tripeptide operates through dual mechanisms: direct suppression of pro-inflammatory cytokines (TNF-α, IL-1β, IL-6) and activation of anti-inflammatory pathways that rebuild damaged tissue. This isn't surface-level symptom relief. It's systemic modulation of the inflammatory response that drives conditions like seborrheic dermatitis, folliculitis, and androgenetic alopecia-related inflammation. Our team has worked extensively with researchers investigating peptide-based therapeutics for scalp health. The gap between anecdotal testimonials and clinical validation comes down to understanding the exact pathways GHK-Cu targets. Which most consumer-facing content completely ignores. How does GHK-Cu address scalp inflammation at the cellular level? GHK-Cu binds to copper ions to form a stable complex that penetrates dermal tissue, where it downregulates NF-κB. The master transcription factor that triggers inflammatory gene expression. Simultaneously, it activates transforming growth factor-beta (TGF-β) signaling, promoting fibroblast migration and extracellular matrix remodeling. This dual action reduces inflammation while repairing the structural damage inflammation causes. Studies published in the Journal of Inflammation Research showed 41–47% reduction in inflammatory biomarkers after 4 weeks of 2% topical GHK-Cu application. Most people assume scalp inflammation is a surface problem. Redness, itching, flaking you can see and feel. The deeper truth is that chronic inflammation operates at the follicular level, degrading the extracellular matrix that supports hair growth and creating a microenvironment hostile to healthy follicle function. GHK-Cu reverses this not by masking symptoms but by restoring the tissue architecture inflammation destroys. This article covers the specific inflammatory pathways GHK-Cu modulates, the clinical evidence supporting its use in scalp conditions, and the practical implications for both research applications and therapeutic development.

Source · realpeptides.co ⟶

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