Estriol 0.1% | GHK-Cu 0.5% | Hyaluronic Acid 0.5%
Estriol 0.1% | GHK-Cu 0.5% | Hyaluronic Acid 0.5% is a prescriber-directed cream prepared or dispensed for patient-specific use within the Hormone Optimization therapy area. Genesis should dispense this medication only pursuant to a valid prescription and the prescriber's clinical judgment.
This compounded topical serum combines three bioactive agents targeting skin aging and barrier restoration: estriol, a locally active endogenous estrogen, supports dermal collagen and skin hydration; GHK-Cu (glycyl-L-histidyl-L-lysine copper complex) is a naturally occurring regenerative tripeptide that stimulates collagen, elastin, and extracellular matrix synthesis; and hyaluronic acid is a high-molecular-weight polysaccharide providing superior humectant and structural scaffold properties. Together, they target multiple pathways of skin aging: hormonal, regenerative, and hydration. Genesis Compounding prepares this as a prescription-only, patient-specific 503A compounded topical serum; it is not FDA-approved as a compounded preparation.
| Active Ingredient | Pharmacologic Role |
|---|---|
| Estriol 0.1% | Weak endogenous estrogen (estriol) that binds cutaneous ERα/ERβ receptors to stimulate dermal collagen I and III synthesis, improve skin thickness and elasticity, and support barrier function in estrogen-deficient skin. |
| GHK-Cu 0.5% | Copper tripeptide complex (glycyl-L-histidyl-L-lysine bound to Cu²⁺) that stimulates fibroblast proliferation, collagen and elastin synthesis, glycosaminoglycan production, and angiogenesis, while exerting antioxidant and anti-inflammatory effects through broad gene-regulatory activity. |
| Hyaluronic Acid 0.5% | High-molecular-weight glycosaminoglycan humectant that binds water within the extracellular matrix and on the skin surface, providing immediate plumping, improving skin hydration, and supporting the scaffold structure of the dermis. |
Route: Topical application to facial or targeted skin areas.
Apply a thin layer of serum to cleansed, dry skin. Gently massage into the skin using upward motions until fully absorbed. This preparation may be used as a morning serum, followed by a broad-spectrum sunscreen (SPF ≥30), or as directed by the prescriber. Avoid contact with eyes and mucous membranes. Do not apply to open wounds or acutely inflamed skin.
Application frequency and area are determined by the prescribing clinician. Typical practice:
- Apply once or twice daily (morning and/or evening) to the face or target areas as directed.
- A small amount (pea-sized quantity for the full face) is generally sufficient.
- Clinical benefit from retinoid-free regenerative serums is typically evaluated after 8–12 weeks of consistent use.
- Estriol (0.1%): Binds ERα and ERβ in dermal fibroblasts and epidermal keratinocytes; upregulates transcription of collagen I, collagen III, and fibronectin genes; improves dermal thickness and elasticity; may modulate matrix metalloproteinase (MMP) activity to reduce collagen degradation. As the weakest of the three endogenous estrogens, topical estriol at low concentrations provides predominantly local cutaneous effects with minimal systemic estrogenic activity.
- GHK-Cu (0.5%): Binds copper(II) ions and penetrates the stratum corneum; activates a broad transcriptional program (up- and down-regulating approximately 31% of the human genome by ≥50%) via chromatin remodeling and gene expression reset; directly stimulates fibroblasts to produce collagen, elastin, dermatan sulfate, and chondroitin sulfate; modulates MMP/TIMP balance to support collagen remodeling without excessive degradation; enhances angiogenesis through VEGF-like signaling; reduces NF-κB-mediated inflammation and acts as a scavenger of lipid peroxidation products, protecting keratinocytes from oxidative damage.
- Hyaluronic Acid (0.5%): A naturally occurring glycosaminoglycan that retains up to 1,000× its weight in water; upon topical application, forms a hygroscopic film on the skin surface and penetrates to superficial epidermal layers, attracting and retaining moisture; supports extracellular matrix scaffold integrity; binds CD44 and RHAMM cell surface receptors on keratinocytes and fibroblasts, modulating cell migration, proliferation, and wound repair signaling.
Clinical Context: This triplex serum is used in prescriber-directed cosmetic dermatology and regenerative skincare protocols for patients with skin aging changes including fine lines, loss of dermal volume, reduced elasticity, and dryness. The estrogen component (estriol) is particularly relevant in postmenopausal patients with estrogen-deficient skin, where local topical estriol has been studied to improve dermal collagen and barrier function. GHK-Cu provides broad regenerative support applicable to aging, photoaged, and post-procedure skin. Hyaluronic acid addresses the immediate hydration needs that underlie the appearance of fine lines and dryness.
Monitoring Considerations:
- Although estriol 0.1% is expected to have minimal systemic absorption, prescribers should factor this into the overall hormone exposure in patients with hormone-sensitive conditions.
- Assess skin tolerability and cosmetic response at 8–12 weeks.
- GHK-Cu in high-oxidation environments (e.g., combined with concentrated vitamin C or strong AHAs) may have reduced efficacy; consider application timing to optimize stability.
Contraindications:
- Hypersensitivity to any active ingredient (estriol, GHK-Cu, hyaluronic acid) or formulation excipients.
- Patients with known estrogen-sensitive malignancies (e.g., breast, endometrial cancer) should avoid topical estriol-containing preparations unless individually approved by the treating oncologist.
- Pregnancy: safety of topical estriol-containing preparations during pregnancy is not established; avoid unless directed by prescriber.
Warnings & Precautions:
- Avoid contact with eyes and mucous membranes.
- Do not apply to actively infected or broken skin.
- Avoid simultaneous application with concentrated vitamin C (ascorbic acid) serums or strong AHA/BHA exfoliants in the same session, as these may degrade the copper peptide complex.
Drug Interactions:
- Strong topical oxidants (e.g., high-concentration L-ascorbic acid): may oxidize and deactivate GHK-Cu; use in alternating sessions if both are prescribed.
- Topical aromatase inhibitors or antiestrogens: potential pharmacodynamic antagonism of the estriol component.
Common Side Effects: Generally well tolerated. Mild transient erythema or tingling may occur on initial application, particularly if skin barrier is compromised. Allergic contact dermatitis to any of the components is possible but uncommon.
Store at controlled room temperature (20–25°C / 68–77°F). Protect from light and heat; copper peptides and estriol may degrade with UV or heat exposure. Keep tightly capped. Do not freeze. Keep out of reach of children. Use before the beyond-use date (BUD) assigned by Genesis Compounding on the prescription label.
Why are these three ingredients combined in one serum?
Each ingredient addresses a different aspect of skin aging: estriol supports collagen via estrogen-receptor signaling; GHK-Cu broadly activates regenerative genes and supports extracellular matrix repair; and hyaluronic acid provides immediate hydration and structural scaffolding. Together they address aging from hormonal, cellular, and hydration perspectives simultaneously.
Can I use this serum if I am postmenopausal?
Yes — postmenopausal patients with estrogen-deficient skin are a primary target population for topical estriol-containing preparations. However, patients with a history of hormone-sensitive cancers should confirm suitability with their oncologist before use.
Why should I avoid combining this with vitamin C serum in the same session?
Concentrated ascorbic acid (vitamin C) can oxidize the copper ion in GHK-Cu, reducing the peptide's biological activity. If both are prescribed, apply them at separate times (e.g., GHK-Cu serum in the evening, vitamin C in the morning) as directed by your prescriber.
Is this preparation FDA-approved?
No. This is a 503A compounded preparation made by Genesis Compounding to your prescriber's specifications. The individual ingredients have established pharmacological profiles, but this combination has not undergone FDA drug approval review.
How long before results are visible?
Hyaluronic acid provides immediate improvements in skin hydration and plumping. Collagen-level improvements from estriol and GHK-Cu typically develop over 8–12 weeks of consistent daily use, with continued improvement at 3–6 months.
Clinical References
Authoritative sources reviewed in preparing this clinical summary. Provided for prescriber reference; not a substitute for the prescriber’s clinical judgment.