GHK-Cu Dosing: 1.7mg/Day Injectable

GHK-Cu (copper tripeptide-1) is a naturally occurring copper-peptide complex that plays crucial roles in tissue repair, collagen synthesis, and antioxidant enzyme function. Unlike most peptides, GHK-Cu exists naturally in human plasma, urine, and saliva. Topical GHK-Cu has extensive clinical research. Injectable GHK-Cu has no human trials. This is not medical advice.

Quick Reference: Standard Protocol

Topical alternative: 0.1-1% concentration applied daily/nightly on a continuous basis. Topical has clinical trial support; injectable is community-driven.

For the full GHK-Cu peptide profile, vendor pricing, and stack protocols, see our GHK-Cu peptide page.

Cycling: 8 Weeks On, 8 Weeks Off

Run 1.7 mg subcutaneous daily in the morning for 8 weeks, then take 8 weeks off. GHK-Cu effects on skin and hair build gradually over the cycle. The cycling approach is conservative given the lack of long-term human injectable data.

Morning injection aligns with natural circadian collagen synthesis rhythms. Empty stomach is not required but many users prefer consistent timing. Topical users can apply evening for overnight penetration and repair.

Routes of Administration

Subcutaneous injection (community protocol): Abdomen, love handles, thighs -- anywhere with SC fat. Typical volume 0.1 mL. 29-31 gauge insulin syringe. No human clinical trials for this route.

Topical application (well-studied): Serums at 0.1-0.5%, creams at 0.2-1%, hair products at 0.1-0.3%. Apply to clean skin, allow absorption before other products. For hair, massage into scalp. Clinical trial support for skin aging, wound healing, and hair density.

Reconstitution Quick Reference

Math: 50,000 mcg / 3 mL = 16,667 mcg/mL (16.67 mg/mL). For 1.7 mg: 1,700 / 16,667 = 0.102 mL = ~10 units. One vial lasts ~29 days.

Swirl gently -- do not shake. Refrigerate at 2-8°C and use within 28 days. For step-by-step instructions, see the GHK-Cu Reconstitution Guide.

Where These Numbers Come From

GHK-Cu has extensive topical research but injectable protocols are community-developed.

Topical clinical data: Decades of research on wound healing (0.2-1% GHK-Cu in wound dressings showed accelerated healing and improved collagen deposition), skin aging (facial creams with 0.05-0.1% improved fine lines, firmness, and clarity), and hair growth (0.2% scalp treatments increased density and thickness) (Pickart et al., 2012).

Natural plasma levels: GHK-Cu occurs in human plasma at ~200 ng/mL (young adults) declining to ~80 ng/mL (older adults). This decline drives interest in supplementation.

Injectable rationale: Community doses (1-2 mg daily) are derived from bioactive concentrations in cell culture (nanomolar range), molecular weight calculations from topical concentrations, and conservative starting assumptions. No human pharmacokinetic data exists for injectable use.

Gene expression: GHK-Cu affects expression of over 4,000 genes related to tissue repair, antioxidant defense, and inflammation (Campbell et al., 2012).

Stacking Protocols

Stacking tips: Start separately to assess individual response. Different injection sites for multiple peptides. Monitor copper levels if concerned about cumulative intake.

Side Effects & Safety

• Topical: minimal -- occasional mild skin irritation in sensitive individuals; decades of cosmetic use with excellent safety
• Injectable: unknown -- no human clinical safety data for this route
• Injection site redness -- standard for SC peptides, community reports generally well-tolerated
• Copper accumulation (theoretical) -- repeated injections could theoretically raise levels, though doses are small
• Wilson's disease -- individuals with copper metabolism disorders should avoid GHK-Cu
• Iron interaction -- high copper can interfere with iron absorption; monitor if supplementing both
• Consider baseline copper/ceruloplasmin testing if using injectable route long-term

Frequently Asked Questions

What is the standard GHK-Cu dose?

Injectable: 1.7 mg subcutaneous daily in the AM, 8 weeks on / 8 weeks off. Use a 50 mg vial with 3 mL BAC water -- 1.7 mg = 10 units. Topical: 0.1-1% concentration applied daily.

Should I use GHK-Cu topically or by injection?

Topical is well-studied with clinical data for skin/hair. Injectable is community-driven with no human trials. Many start with topical.

How long should a GHK-Cu cycle last?

Injectable: 8 weeks on, 8 weeks off. Topical: continuous use based on cosmetic safety data.

Can GHK-Cu be stacked with BPC-157?

Yes -- complementary mechanisms. GHK-Cu handles collagen and matrix remodeling; BPC-157 provides angiogenesis and growth factors.

What are the side effects?

Topical: minimal. Injectable: community reports few side effects at 1-2 mg doses, but no clinical safety data exists.

Related Guides

• GHK-Cu Peptide Page -- Full profile, vendor pricing, and comparisons
• GHK-Cu Results Timeline -- Week-by-week timeline for skin, hair, and healing
• GHK-Cu Benefits -- 6 research-backed effects ranked by evidence
• GHK-Cu Reconstitution Guide -- Step-by-step mixing and dilution charts
• GHK-Cu Bloodwork Guide -- What labs to track
• BPC-157 Dosing Guide -- Complementary tissue-repair peptide
• Epitalon Dosing Guide -- Anti-aging stacking partner
• Calculate Your GHK-Cu Cycle Cost -- estimate vials needed and total cost

Available in Blends

• Klow Blend Dosing Guide -- BPC-157 + TB-500 + GHK-Cu + KPV (80mg 4-peptide blend)
• Glow Blend Dosing Guide -- BPC-157 + TB-500 + GHK-Cu (70mg 3-peptide blend)

References

For educational and research purposes only. This is not medical advice. GHK-Cu topical use has clinical support; injectable use is experimental.