GHK-Cu,or GHK-Cu plus three.
You picked SKIN + HAIR. Either one is $189 a month and one injection, five days a week.
Short online intake. A licensed provider decides whether it gets written, and a no gets you a full refund.
Licensed U.S. providers
Licensed U.S. pharmacy
LegitScript certified
a month for either one, GHK-Cu or KLOW.
peptides in a KLOW vial, for the same price.
a week, one injection, either way.
GHK-Cu: the copper, solo
GHK-Cu is a copper peptide first isolated from human plasma in 1973, and our own product page puts plasma levels at about 200 ng/mL at age 20 and under 80 by 60. On its own it comes at full strength, 10 mg/mL, run five nights a week for six weeks, then four weeks off. GHK-Cu is $219 for a single vial.
KLOW: GHK-Cu plus three
KLOW puts GHK-Cu, BPC-157, TB-500 and KPV in one vial, and the builder counts it as one compound, so you get four peptides for the same $189 a month. The tradeoff is less copper per shot, 3 mg/mL, because it shares the vial with the other three. It runs five days a week. KLOW is $247 for a single vial.
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Picking between them
If you want the copper at full strength, start with GHK-Cu. If you’d rather have copper plus repair and inflammation work in the same injection, start with KLOW. Still split? Either way a provider reviews it, and you can swap before every box.
Who does what
You fill out a short online intake. No appointment, no waiting room.
You choose what goes in the box, and a licensed U.S. provider decides whether it gets written. If the answer is no, you get a full refund to your original payment, never store credit.
The pharmacy compounds it, a third party batch tests it for sterility and potency, and the box ships cold to all 50 states.
It goes under the skin, five days a week. If needles make you nervous, a step-by-step injection guide walks you through the first one.
Honorable mentions
GHK-Cu and KLOW are where we’d start, but they aren’t the whole shelf. Each of these has its own page, and a provider reviews it the same way.
01
Copper Cream
For when a needle is a hard no. The same copper peptide in a cream, $99 for the 0.5% jar or $199 for the 2%.
See the cream
02
Glutathione
The builder calls it the cleanup pass. Add it and NAD+ to KLOW and you’ve rebuilt the builder’s ready-made Inside out stack. $205 a vial.
See Glutathione
03
NAD+
The third piece of Inside out, a coenzyme in every cell you’ve got. $215 a vial.
See NAD+What about hair?
GHK-Cu is the one product in our catalog listed for hair as well as skin. We don’t have hair research to point you to, so we won’t promise anything there.
The fine print
GHK-Cu’s common effects are injection-site irritation and occasional mild bruising from the copper, and nausea is rare. KLOW’s are much the same: redness, mild swelling, itching or bruising at the site, and occasional nausea early on. Its own page says human safety data for the four-peptide blend is limited.
Neither is for anyone under 18 or anyone pregnant or breastfeeding, and the product pages list active cancer, chronic kidney disease, untreated cardiovascular conditions and a peptide or copper hypersensitivity as reasons to skip.
The research on copper peptides in skin is early and mostly small, so nobody can promise you a result, us included.
Why cheaper vials cost less
You’ll find both for less online. They cost less because nobody reviews the order or compounds it under a license, and when something goes wrong, there’s nobody to email. We answer ours.
Swap before every box
Each cycle runs four weeks, and we email before every charge, so you get a window to switch from GHK-Cu to KLOW, or back, or add a second compound. If the provider pulls one, you can trade it for another at the same price or take a partial refund and drop a tier.
If a subscription feels like a lot of commitment for a first try, both come as a single vial, one time, on the pages linked above.
On the builder, both sit under Skin + Hair.
Short online intake. A licensed provider decides whether it gets written, and a no gets you a full refund.
Clinician-prescribed. Ships from a licensed U.S. pharmacy.
Images are illustrative.