Claim: GHKCU is a peptide that can be applied topically to improve skin quality by increasing collagen and elastin.
Verdict: Correct (95% confidence)
Explanation: According to a Tier 1 source from the National Center for Biotechnology Information (NCBI), GHK-Cu applied to the skin improves collagen production, supporting the claim that it enhances skin quality (PMC6073405). Additionally, multiple Tier 9 sources, such as agerejuvenation.com and westlakedermatology.com, corroborate that GHK-Cu increases both collagen and elastin production, which are mechanisms for improving skin quality. These sources confirm the claim's core proposition, and no credible s...