Oligopeptide-127 Rh-Oligopeptide-1: 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: June 30, 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 Oligopeptide-127 Rh-Oligopeptide-1?

Oligopeptide-127 rh-Oligopeptide-1 is a lab made peptide, or short chain of amino acids, created through safe fermentation in the common bacterium E. coli. Scientists start by fusing the genetic code for two well known skin friendly peptides, rh-Oligopeptide-1 and Oligopeptide-127, into one 65-amino-acid strand. This code is inserted into E. coli, the bacteria grow, then the peptide is harvested and carefully purified for skin care use.

Peptides earned a place in beauty formulas in the early 2000s when researchers saw how small protein fragments could signal fresher looking skin. By joining two peptide sequences, makers hoped to blend their strengths in one ingredient, leading to Oligopeptide-127 rh-Oligopeptide-1. Today it shows up in high end serums, anti aging creams, sheet masks, soothing post procedure gels and everyday moisturizers where a boost of conditioning is desired.

Oligopeptide-127 Rh-Oligopeptide-1’s Cosmetic Benefits/Uses

This fusion peptide supports the feel and look of healthy skin in two key ways

  • Skin conditioning: Helps skin hold water, smooths rough spots and can leave the surface looking more even and refreshed
  • Emollient: Softens and eases dryness by forming a thin, flexible layer that makes skin feel silky and comfortable

Who Can Use Oligopeptide-127 Rh-Oligopeptide-1

Because it is lightweight and non greasy this peptide suits most skin types including dry, normal, combination, oily and even sensitive skin that often reacts to harsher actives. Its mild conditioning action helps replenish moisture without clogging pores so acne prone users generally tolerate it well. At the time of writing there are no specific skin types that should avoid it unless an individual has a known allergy to peptides or any other component in the finished product.

The ingredient is produced by fermenting E. coli that has been given a lab made gene sequence which means no animal tissue or by products are required. For that reason it is considered suitable for vegetarians and vegans as long as the finished formula does not include animal derived additives such as beeswax or collagen.

Current data shows minimal skin penetration and no link to hormonal disruption so pregnant or breastfeeding women can usually use products containing this peptide. That said this information is not medical advice and anyone who is pregnant or nursing should run any skincare routine past a qualified healthcare provider to be on the safe side.

Oligopeptide-127 rh-Oligopeptide-1 does not make skin more sensitive to sunlight so it is not classified as photosensitising. Daily sunscreen is still advisable for overall skin health.

Potential Side Effects/Adverse Reactions

Individual responses to topical Oligopeptide-127 rh-Oligopeptide-1 can vary. The following list covers potential side effects yet most people will not experience them when the ingredient is properly formulated and used as directed.

  • Transient redness or warmth brief flushing that settles quickly as skin adjusts
  • Itching or mild irritation usually linked to very sensitive skin or over application
  • Stinging on broken or freshly exfoliated skin because the barrier is already compromised
  • Allergic contact dermatitis rare but possible if someone is specifically allergic to the peptide or a preservative in the formula
  • Interaction with strong acids or retinoids may cause cumulative irritation in some users

If any discomfort swelling or persistent irritation occurs discontinue use and seek advice from a healthcare professional or dermatologist.

Comedogenic Rating

Rating: 0 / 5

Oligopeptide-127 rh-Oligopeptide-1 is a small water soluble protein fragment with no oily or waxy components so it does not lodge inside pores or encourage the buildup of sebum and dead cells, earning the lowest comedogenic score.

This makes the ingredient suitable for skin that is prone to acne or breakouts.

The overall formula still matters so if the peptide is blended with heavy butters or rich oils the finished product could feel pore clogging even though the peptide itself is not.

Summary

Oligopeptide-127 rh-Oligopeptide-1 is a lab designed 65-amino-acid fusion peptide that mainly conditions skin and acts as a gentle emollient, helping bind water, smooth rough texture and leave the surface soft and comfortable.

The peptide has a niche yet growing presence in advanced serums, sheet masks and recovery creams rather than mass market cleansers or lotions but its reputation is steadily rising as brands look for non irritant ways to boost skin feel.

Current research and real world use show it to be very safe with low allergy risk and no known hormonal or photosensitivity issues. As with any new skincare ingredient it is smart to perform a simple patch test when trying a product that contains it just to be cautious.

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