Peptides for Anti-Aging: Which Types Actually Work
What Are Peptides and Why They Matter
Peptides are short chains of amino acids that signal skin cells to perform specific functions. In anti-aging, certain peptides stimulate collagen production, relax expression lines, or improve skin barrier function.
Signal Peptides: Collagen Boosters
Palmitoyl pentapeptide-4 (Matrixyl) and palmitoyl tripeptide-1 are the most studied signal peptides. They trick skin into thinking it's damaged, triggering new collagen synthesis. Clinical studies show 15-20% wrinkle reduction after 12 weeks.
Neurotransmitter Peptides: Botox-Like Effects
Argireline (acetyl hexapeptide-3) inhibits neurotransmitter release at the neuromuscular junction, reducing muscle contractions. Results are modest compared to Botox — about 30% wrinkle depth reduction vs. Botox's 80%.
Carrier Peptides: Mineral Delivery
GHK-Cu (copper peptide) delivers copper ions that are essential for wound healing and collagen crosslinking. Studies show improved skin elasticity, density, and firmness after 8 weeks of use.
Enzyme Inhibitor Peptides
Soy and rice peptides inhibit MMP enzymes that break down collagen. They protect existing collagen rather than stimulating new production. Best used preventatively in your 20s and 30s.
How to Layer Peptides in Your Routine
Apply peptide serums after cleansing and toning, before heavier moisturizers. Peptides work best at a slightly acidic pH (5.0-6.0). Don't mix with strong acids or vitamin C in the same step.
What to Look for on Labels
Check that peptides appear in the top half of the ingredient list. Look for specific peptide names, not just 'peptide complex.' Effective concentrations are typically 2-10%.
