Peptide Science
How topical peptides work, what the trials show, and where the evidence stops.
- Peptide Science
Argireline Before and After: What Trials Show at 4, 8 and 12 Weeks
Argireline before and after, by the numbers: what trials found from 4 to 12 weeks, why 48.9% isn't a depth cut, and how to judge photos fairly.
- Peptide Science
Can You Use Peptides and Retinol Together? What the Studies Show
Can you use peptides and retinol together? Yes for most people. What combined-product studies show, copper peptide cautions and layering options.
- Peptide Science
Copper Peptides for Skin: What GHK-Cu Does, What the Evidence Shows, and How to Layer It
Copper peptides for skin (GHK-Cu): mechanism, the human evidence (and its gaps), whether it absorbs, and how to pair it with retinol, vitamin C and niacinamide.
- Peptide Science
Do Peptides Absorb Into Skin? What Penetration Studies Show
Do peptides absorb into skin? Most barely get past the surface layer. Here is what penetration studies on GHK-Cu, Matrixyl and Argireline measured.
- Peptide Science
Peptide Ingredients in Skincare: Signal, Carrier, Neurotransmitter and Enzyme-Inhibitor Peptides Explained
Peptide ingredients in skincare, from Matrixyl to GHK-Cu: how each class works, what the human trials show, and whether they penetrate skin.
- Peptide Science
SNAP-8 Peptide (Acetyl Octapeptide-3): What It Is, How It Works and What the Evidence Shows
The SNAP-8 peptide (acetyl octapeptide-3) is sold as a stronger Argireline. Here's what its mechanism, the 2 human studies and the evidence gaps show.
- Peptide Science
What Does Argireline Do? Mechanism, Human Trials and Limits
What does Argireline do? How acetyl hexapeptide-8 works in cell studies, what small human trials found, and why it isn't Botox in a bottle.