- 01Tissue & repair research · 2 min read
Fibroblasts, collagen, growth factors and extracellular matrix remodeling
Fibroblasts help produce and organize the extracellular matrix, including collagen. Growth factors influence cell behavior, while remodeling continually changes the matrix. Effective repair…
- 02Skin & cosmetic science · 2 min read
Copper peptides and GHK-Cu: identity, signaling and evidence
Copper peptides are peptides that bind copper. GHK-Cu is a copper complex of the tripeptide glycine-histidine-lysine. Its chemistry and laboratory effects are interesting, but they do not…
- 03Skin & cosmetic science · 2 min read
Peptides, firmer-looking skin and collagen as skin ages
Some peptide-containing formulations have shown cosmetic benefits in human studies. That does not mean every peptide product improves aging skin, and a firmer appearance does not by itself…
- 04Skin & cosmetic science · 2 min read
What is acetyl hexapeptide-8, and what does expression-line research show?
Acetyl hexapeptide-8 is a synthetic six-amino-acid peptide used in cosmetics. It has been studied for effects on the appearance of expression lines, but it should not be described as…
- 05Skin & cosmetic science · 2 min read
Peptides versus retinol, and what encapsulation changes
Peptides and retinol are different ingredient categories. Retinol is a vitamin A compound, not a peptide. Encapsulation is a formulation strategy that may influence stability and delivery;…
- 06Skin & cosmetic science · 2 min read
PDRN explained: why it is not a peptide
PDRN means polydeoxyribonucleotide, a material made of DNA fragments. Peptides are chains of amino acids. They belong to different chemical categories, even when both appear in skin-care…
- 07Skin & cosmetic science · 2 min read
The skin barrier and what cosmetic clinical testing really tells us
The skin barrier helps limit water loss and unwanted entry from the environment. Cosmetic testing can measure aspects of barrier function, hydration and appearance, but “clinically tested”…
Reading journey
What can a collagen claim really tell you?
Connect the biology of skin with ingredient studies, formulation and finished-product evidence.
