Shop All — Cuprum Labs | The honest peptide line

The line

One rule. Every bottle.

The dose is real, it's printed on the label, and every batch ships with its certificate of analysis. The copper serum set the standard — the rest of the line is held to it.

  • Real % on every label
  • COA for every batch
  • No proprietary blends
  • No fairy-dust doses

Available now · The flagship

GHK-Cu Copper Peptide Serum

0.2% actual active GHK-Cu — the real number, printed on the label. Most "1% copper peptide" serums quote 1% of a pre-made solution, which leaves the actual peptide unstated. The product this whole brand was built around.

Shop the flagship

The rest of the shelf

Held to the same rule as the serum. Join the list and you'll hear the moment a new one is ready.

    Want in first?

    The line launches to the list before anywhere else — with launch pricing and the COAs to go with it.

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    Real % on every label · COA for every batch · 90-day guarantee