Pentapeptide-58: What Is It, Cosmetic Uses, Benefits & Side Effects

Curious about this ingredient? In this article we're explaining exactly what it is and why it's used within cosmetic formulations.
Updated on: July 1, 2025
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We verify all information on this page using publicly available nomenclature standards from The Personal Care Products Council (PCPC), the European Commission's CosIng database and documentation provided directly by ingredient manufacturers. Our analysis is based on technical data from these sources to ensure accuracy and reliability.

What Is Pentapeptide-58?

Pentapeptide-58 is a lab made chain of five tiny building blocks called amino acids: cysteine, glutamic acid, glycine, leucine and threonine. Because it is synthetic, makers can control its purity and strength far better than if it came from a natural extract. It first drew attention when researchers saw that certain short peptides could signal skin cells to behave in a younger, healthier way. From there, brands began adding Pentapeptide-58 to formulas aimed at smoothing and fortifying the skin.

To create Pentapeptide-58, chemists link the five amino acids together in a precise order using solid-phase peptide synthesis, then purify the result so no extra residues remain. The finished powder is stable, dissolves well in water based solutions and blends easily into finished products.

You will most often spot Pentapeptide-58 in leave-on items such as anti aging serums, rich moisturizers, eye creams and sheet masks, though some wash-off masks and primers also use it to give skin a quick boost.

Pentapeptide-58’s Cosmetic Benefits/Uses

In skin care formulas Pentapeptide-58 plays two main roles that work together for healthier looking skin.

  • Skin Conditioning: Helps skin feel softer and smoother by supporting natural moisture levels and reducing the look of fine lines so the complexion appears more even and refreshed
  • Skin Protecting: Supports the skin’s barrier, making it better able to cope with daily stressors like weather changes or pollution which can lead to irritation or dryness

Who Can Use Pentapeptide-58

Pentapeptide-58 is generally well tolerated by all main skin types including dry, oily, combination and sensitive complexions. Because it is water based and lightweight it will not clog pores, making it a good option for acne prone skin as well. Those with a known allergy to peptides or any other ingredient in the finished formula should avoid it but this is uncommon.

The peptide is produced entirely in a lab from non animal sources so it is suitable for both vegans and vegetarians. No animal derived carriers or enzymes are involved in its standard manufacturing process.

Current research has not flagged any issues for women who are pregnant or breastfeeding however safety data during these stages is limited. This information is not medical advice and anyone who is pregnant or nursing should show the full ingredient list of their skincare to a qualified healthcare professional before use.

Pentapeptide-58 does not increase photosensitivity so it can be used morning or night without boosting the skin’s vulnerability to sunburn. A broad spectrum sunscreen is still recommended during daytime use of any skincare routine.

Potential Side Effects/Adverse Reactions

Reactions to topical Pentapeptide-58 vary from person to person. The points below outline potential side effects that could appear even though most users will not experience them when the ingredient is formulated and used correctly.

  • Mild redness or warmth
  • Temporary tingling right after application
  • Localised irritation for highly sensitive skin
  • Rare allergic contact dermatitis

If any of these effects occur discontinue use and consult a healthcare professional or dermatologist

Comedogenic Rating

Rating: 0/5

Pentapeptide-58 is water soluble, used at low levels and leaves no oily film so it does not block pores.

This makes it suitable for people prone to acne or breakouts.

Remember that a product’s overall pore-clogging risk depends on every ingredient in the formula, not just the peptide.

Summary

Pentapeptide-58 is a lab crafted chain of five amino acids that helps skin stay smooth, hydrated and resilient by nudging cells to behave in a healthier way and by reinforcing the barrier.

Although not yet a household name it is popping up more often in modern serums, eye creams and masks because it is lightweight and friendly to nearly all skin types.

The ingredient is considered very safe with only rare mild reactions reported, but it is always wise to patch test any new product before fully applying it.

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