GHK-Cu DOSAGE / 05
GHK-Cu dosage: amounts used in studies
These amounts came from cell, skin, hair, and rat studies. They aren't directions, because no sound human study sets a whole-body dose.
What amounts did GHK-Cu studies use?
Early researchers used tiny amounts of GHK-Cu on skin repair cells. Later teams tested creams on people; other teams gave shots or nose drops to rats. Those tests aren't equal, and rat findings do not set your amount.
This page first tells how each amount was given, then names the test subject. It isn't a set of directions; no sound human study gives a GHK-Cu dose for use throughout the body [6].
In each liter, the two smallest cell mixes held no more than 10 trillionths of a mole. The largest held under 10 billionths, and all three were below 10 billionths. Chemists use moles to count tiny particles. These lab amounts do not give you a home dose, though collagen rose in the cells [1].
Skin creams, gels, and serums in studies held about 0.05% to 2% of the product by weight [3][14]. Rat studies used belly shots or nose drops; the amounts were chosen for rats, not people [9][10].
The human hair trial put aminolevulinic acid mixed with GHK on the scalp at 50-100 milligrams per milliliter [4]. That was not GHK-Cu alone.
The skin-cell finding [1] and hair-trial amount [4] are the clearest figures. Rat amounts don't become a safe human plan for you.
Where did researchers put GHK-Cu?
Researchers tested GHK-Cu in creams, gels, serums, and lab-made carriers placed near skin cells. In rats, they used nose drops, belly shots, liquid by tube, vein shots, and shots under the skin [6].
For you, the main split is plain: human support mostly concerns skin, while the other routes mainly come from rats.
After 48 hours, a skin test found 97 micrograms of copper on a skin patch one centimeter by one centimeter [5]. A microgram is a gram divided into a million equal parts. That result may help explain why researchers work on moving GHK-Cu through the outer layer [5][14].
Rat nerve studies used nose drops because that route can reach the brain more directly. Human studies have not proved that a blood dose reaches the brain [15], so a rat route cannot answer that question for you.

Do human studies show how long GHK-Cu stays?
No careful human timing study has established how long GHK-Cu stays in the body. Blood proteins break apart GHK without copper quite fast. That free form may not stay where researchers place it for long.
Later papers repeat an estimate of about 1-2 hours in the body. You can't treat that as a firm human figure for GHK-Cu [6]. Adding copper may help GHK remain for more time than GHK alone, but a sound human time is still missing from the papers.
Use on skin answers a different question; a skin test found that some copper remained in the skin [5]. This leaves you without an answer for how long GHK-Cu stays throughout the body.
Major blanks remain for shots; human work doesn't show the highest blood level, the share reaching blood, or where the compound goes [6]. Plans posted online can't fill those blanks.
What helps GHK-Cu keep hold of copper?
GHK-Cu holds copper very tightly [6]; that close bond leaves less loose copper able to harm cells. The point matters when you read safety claims.
The studies tell you that the compound stays together best between 5-6.5 on the usual acid scale. Lower numbers on that scale mean stronger acid; a 1:1 mix pairs one part copper with one part GHK.
A sound mixture is blue to violet. A brown or green color may show that the mixture has changed or formed bits that dropped out of the liquid [6].
Below about 3.5 on the acid scale, vitamin C may change copper enough to break the bond. Strong skin acids may weaken the bond as well [6][14]. The whole product mix therefore matters.
GHK without copper does not cross the outer skin well. Researchers tested fat bubbles, oils, altered GHK, and tiny needles to help it pass [13][14].