INCI: Palmitoyl Tetrapeptide-50 - Also known as: Pal-GQPR, Anti-Inflammaging Peptide, Pro-Collagen IV Peptide

QUICK FACTS

What is Palmitoyl Tetrapeptide-50?

Palmitoyl Tetrapeptide-50 is a palmitoylated synthetic tetrapeptide — a four-amino-acid sequence (Gly-Gln-Pro-Arg, GQPR) attached to a C16 palmitoyl fatty acid for enhanced skin penetration. The GQPR sequence is derived from a fragment of the collagen IV chain — specifically from the NC1 domain of collagen IV, a major structural component of the basement membrane that anchors the epidermis to the dermis. This positions Palmitoyl Tetrapeptide-50 in a distinct research category from conventional signal peptides: rather than targeting fibrillar dermal collagen (types I and III), it is studied in connection with the basement membrane environment.

The basement membrane is the thin layer of specialized extracellular matrix that sits between the epidermis and dermis, and its integrity is studied in connection with the adhesion of the two skin layers, the organized epidermal renewal process, and the structural support of the epidermal-dermal junction. Changes in basement membrane collagen IV composition are associated in research with the visible appearance of the epidermis becoming thinner and less organized with age — a process sometimes referred to as "inflammaging" in the dermatological literature, where chronic low-grade surface inflammation is associated with gradual degradation of the ECM.

Palmitoyl Tetrapeptide-50 is studied in connection with addressing this basement membrane dimension of the skin's structural environment — an approach that complements the fibrillar dermal collagen targeting of Matrikynes®, Matrixyl, and the copper peptide system in the same formulas.

What does it do for skin?

Palmitoyl Tetrapeptide-50 is studied in connection with two complementary associations. First, its GQPR sequence is researched as a collagen IV-derived matrikine — studied in connection with supporting the basement membrane environment and the appearance of a more organized, structurally supported epidermal-dermal interface. Research has associated it with improved appearance of skin density, reduced appearance of deep wrinkles, and a more even, refined-looking skin texture over consistent use — outcomes attributed to its studied effect on the basement membrane collagen environment.

Second, the research literature on Palmitoyl Tetrapeptide-50 includes studies exploring its association with surface inflammatory mediator pathways — specifically interleukin-related mediators associated with chronic low-grade surface inflammation (inflammaging). This anti-inflammaging research angle is studied in connection with addressing one of the root environmental contributors to visible skin aging rather than simply compensating for its visible effects. These are research-based associations rather than clinical claims, and individual results will vary.

Within the five-peptide industry complex, Palmitoyl Tetrapeptide-50's basement membrane and anti-inflammaging associations make it the most structurally distinct of the five peptides — addressing a different layer of the skin's ECM environment from the fibrillar collagen and elastin signals targeted by the other four sequences.

FOUND IN

In 3 Formulas as Part of the 5% Industry Peptide Complex

Palmitoyl Tetrapeptide-50 is the second-listed peptide in the industry complex across all three Sweet Chemistry water-based formulas, always appearing immediately after Palmitoyl Hexapeptide-52.

Nourishment - All Skin Types

Barrier Repairing Hydra-Serum 5% Industry Peptide Complex (incl. Palmitoyl Tetrapeptide-50) - 1.0 oz / 30 ml

Hydration - Dry to Normal

Elasticity Reinforcing Hydra-Cream 5% Industry Peptide Complex (incl. Palmitoyl Tetrapeptide-50) - 1.7 oz / 50 ml

Hydration - Dry to Dehydrated

Elasticity Reinforcing Lipid-Cream 5% Industry Peptide Complex (incl. Palmitoyl Tetrapeptide-50) - 1.7 oz / 50 ml

WORKS TOGETHER WITH

ECM Peptide Complex Matrikynes® Bone Peptides

INCI: Hydrolyzed Cow Bone Extract.

At 3% in all four formulas. Synergy Note: Matrikynes® targets the dermal ECM through 315+ matrikine sequences; Palmitoyl Tetrapeptide-50 specifically addresses the basement membrane collagen IV environment. Together they cover both the fibrillar dermal and the basement membrane dimensions of the skin's structural ECM in the same formulas.

Elastin Signal Peptide Palmitoyl Hexapeptide-52

INCI: Palmitoyl Hexapeptide-52.

The lead industry peptide listed alongside Palmitoyl Tetrapeptide-50. Synergy Note: Palmitoyl Hexapeptide-52 targets elastin; Palmitoyl Tetrapeptide-50 targets the basement membrane collagen IV and inflammaging environment. Together they address the structural density appearance goal from the elastin and basement membrane dimensions simultaneously.

Soothing System Bisabolol + Panthenol + Allantoin

INCI: Bisabolol, Panthenol, Allantoin.

The three-ingredient soothing system present in all three water-based formulas. Synergy Note: Palmitoyl Tetrapeptide-50's studied anti-inflammaging association and the soothing system's surface comfort approach both address the relationship between surface inflammation and skin appearance — the peptide targeting the deeper inflammatory mediator environment, the soothing actives addressing the surface.