Peptides

Pentasodium Tetracarboxymethyl Dipeptide-51

INCI: PENTASODIUM TETRACARBOXYMETHYL DIPEPTIDE-51

Reviewed by Kate · Last updated 2 Jun 2026

Also known as: Pentasodium Tetracarboxymethyl Dipeptide-51

A peptide that supports skin renewal through cellular maintenance processes

Best For Skin Types

All, Sensitive, Dry

Addresses

Dryness, Hydration, Barrier repair, Redness

Usage Frequency

Daily

Pentasodium Tetracarboxymethyl Dipeptide-51 products at Skintique

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What Is Pentasodium Tetracarboxymethyl Dipeptide-51?

Pentasodium tetracarboxymethyl dipeptide-51 is a synthetic peptide—a chain of amino acids designed to mimic natural skin signalling molecules. It functions as a skin conditioning agent, working at the cellular level to support the skin's natural renewal mechanisms.

Peptides are valued in skincare because they can communicate with skin cells and influence various biological processes. This particular peptide has been studied for its potential to activate autophagy, which is essentially the skin's cellular 'housekeeping' process—a mechanism that helps cells clear out damaged components and maintain optimal function.

How It Works

This peptide is believed to activate autophagy in skin cells—a cellular recycling process that removes damaged structures and maintains cell health. It may do this by triggering specific signalling pathways (such as AMPK and ULK1) that tell cells to initiate this 'cleaning' process.

When autophagy functions optimally, cells can better regulate inflammation, maintain structural integrity, and respond appropriately to stress. This cellular-level support may translate to visible improvements in hydration, texture, and overall skin appearance over time.

Clinical Evidence & References

Research on this ingredient is still emerging. Available studies are small and often focus on closely related peptides (such as pentasodium tetracarboxymethyl palmitoyl dipeptide-12) rather than this specific variant. These studies suggest potential benefits for inflammatory skin conditions, hydration, and uneven pigmentation, but they typically involve fewer than 50 participants and are often sponsored by ingredient manufacturers.

The evidence is encouraging but not yet extensive. More independent, large-scale trials would strengthen confidence in specific claims. Current research is sufficient to justify its use in skincare formulations, but individual results may vary.

How to Use

This ingredient is typically found in moisturisers and serums designed for hydration and skin conditioning. Use as directed within your regular skincare routine—usually once or twice daily depending on the formulation. It works well alongside other actives but is not an exfoliant or treatment for acute skin concerns on its own. Allow several weeks of consistent use to assess any changes in skin texture or hydration.

Safety & Precautions

This peptide is generally well-tolerated with a low risk of irritation. No significant adverse effects have been reported in available clinical trials. As with any skincare ingredient, patch test if you have very sensitive skin or a history of reactions to peptide-based products.

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