Ingredient guides

What Does 1% Copper Peptide Mean?
Understand the difference between a supplier’s 1% copper peptide declaration and independent verification of an active in a finished batch. Read more...
Do Copper Peptides Help with a “Collagen Look”?
Learn why hydration, appearance claims and collagen measurements are different, and what is currently established for Blue Hour Serum. Read more...
Copper Peptides vs Collagen: What’s the Difference?
Collagen and copper peptides are different ingredients. Distinguish ingredient research from evidence about a finished skincare product. Read more...
How to Layer Copper Peptides
Use Blue Hour according to its label: 1–2 pumps on freshly cleansed, slightly damp face and neck, with clear vitamin C and acid cautions. Read more...
GHK-Cu vs Retinol: Complementary, Not a Contest
Copper peptides and retinol are different ingredients. Read why Blue Hour should not be presented as a proven retinol substitute. Read more...
How to Compare Copper Peptide Serums
Compare copper peptide serums by full ingredient disclosure, product evidence, size, price and directions rather than unsupported rankings. Read more...
What Are Copper Peptides (GHK-Cu)?
Read what copper peptide names mean on a skincare label and what the Blue Hour formula and product evidence actually establish. Read more...