Peptide library

Copper tripeptide-1

Topical cosmetic

Cosmetic-use evidence

Status record: · Page published

Policy context

Added

The October 30, 2026 Federal Register notice announces draft interim guidance for certain peptide bulk substances under section 503A. Draft guidance is nonbinding; it is not drug approval, a permanent 503A bulks-list decision or a section 503B pathway. HHS may reconsider enforcement policy as safety or quality information changes.[2][4]

Outside these specifications: ipamorelin (including acetate), copper tripeptide-1/GHK-Cu, CJC-1295, GLP-1 medicines and multi-active blends.[1]

FDA retains safety concerns in its withdrawn-nomination records for BPC-157, CJC-1295, injectable GHK-Cu, ipamorelin acetate and thymosin beta-4 fragment. Withdrawal of a nomination is not a safety clearance. Ipamorelin acetate also appears in the separate 503B category 2 record. Route-specific uncertainty and limited human data still matter.[5]

Read the full guide, specifications and joint requirements

Evidence record

Product and route
Topical context only; not injection.
Approval scope
A skin-care ingredient; this entry is limited to topical cosmetics.
Mechanism
A complex formed by copper and a tripeptide.
Evidence
One post-laser study found no objective between-group skin advantage.
Limits
A topical study cannot establish the effects of an injection.
Safety context
FDA identifies limited human safety data for injectable GHK-Cu.

A reading exercise

Put the units first when comparing two statements about copper tripeptide-1. Copy each number together with its unit and the quantity it refers to before deciding whether the statements agree. In a fictional example, a share rises from twenty percent to thirty percent: that is ten percentage points, or a fifty percent increase relative to the starting share. Those descriptions use different scales for the same change. Try translating a page's comparison into both an absolute difference and a relative change when the necessary values are available. If they are missing, name the missing value instead of guessing.

Questions to take away

  1. What unit and reference quantity belong to each number in the two statements?
  2. Are the statements describing an absolute difference or a change relative to a starting value?
  3. Which missing value prevents you from translating one description into the other?

Sources

Each date identifies a source check. It is separate from this page’s publication date.

  1. CIR — CIR; checked
  2. Miller — PubMed; checked
  3. FDA safety — FDA; checked
  4. FDA cosmetics — FDA; checked