Hair Peptides – Follicle & Scalp Research

Mechanisms

Why hair research centres on copper peptides

Hair research approaches the follicle as a micro-organ dependent on its blood supply and surrounding matrix. GHK-Cu is studied for angiogenesis — the formation of new capillaries improving perifollicular blood supply — alongside collagen synthesis supporting the surrounding dermal structure, and anti-inflammatory signalling affecting the scalp micro-environment. That combination is why a single compound covers what would otherwise require several.

Purist Peptides research compounds in a laboratory setting

Study design

How hair protocols differ from skin protocols

Hair models typically use intradermal scalp administration rather than systemic subcutaneous dosing, at 500 mcg–1.5 mg, 3–5× weekly, over 8–12 weeks — a longer horizon than skin protocols because the hair cycle itself is slow, and follicle research endpoints take one to three months to become measurable. Excessive daily dosing is avoided to limit vascular overgrowth, and total exposure is kept under 3 mg per day. Unlike most compounds in the range, GHK-Cu does not require cycling, as it occurs naturally in plasma and does not cause receptor down-regulation.

The range

Compounds in this category

The compounds grouped here, each with the pathway it is studied for and the protocol shape most often used.

GHK-Cu

Copper tripeptide

A copper-binding tripeptide studied for follicle vascularisation, scalp integrity, collagen support and hair density. Published third-party test report available (100 mg). Hair protocols typically run 500 mcg–1.5 mg intradermally, 3–5× weekly for 8–12 weeks, with a documented 3 mg daily ceiling

View GHK-Cu

Selection

How to choose

Start from the research question, not the compound name.

If the research question is…	Start with
Follicle and scalp research	GHK-Cu, the only compound in the range with an established hair-model literature
Researching skin and hair together	GHK-Cu covers both; see Peptides for Skin
Want GHK-Cu combined with repair peptides	GLOW and KLOW both contain it
Broader anti-aging context	Anti-Aging & Longevity

Independent laboratory testing of Purist Peptides research compounds

Verified quality

Tested before it ships

Published third-party test report for GHK-Cu (100 mg) · minimum 99% verified purity · documented copper-load safety guidance, maximum daily exposure and intradermal protocol detail on the product page · lyophilised, refrigerate 2–8 °C after reconstitution. See Quality Standards.

See Quality Standards & all COAs

Questions

Hair Growth research FAQ

What is GHK-Cu studied for in hair research?

GHK-Cu is referenced for perifollicular angiogenesis — improving the capillary supply to the follicle — alongside collagen support for surrounding dermal structure and anti-inflammatory signalling in the scalp micro-environment.

How is GHK-Cu administered in hair protocols?

Hair models typically use intradermal scalp administration rather than systemic subcutaneous dosing, at 500 mcg–1.5 mg, 3–5× weekly. Full reconstitution and syringe guidance is on the product page.

How long before hair research endpoints are measurable?

Protocols generally run 8–12 weeks, because the hair growth cycle is slow and follicle-level changes take one to three months to register. This is a longer horizon than skin protocols using the same compound.

Is there a maximum safe exposure?

Research guidance caps daily exposure at 3 mg. Sustained exposure above that, particularly alongside copper supplementation, raises copper-accumulation concerns — documented in full on the GHK-Cu product page.

Does GHK-Cu need to be cycled?

No. It occurs naturally in human plasma and does not cause receptor down-regulation, so protocols commonly run continuously for 3–6 months rather than in on/off cycles.

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