Ingredient review

Barley SH-Polypeptide-25

INCI: BARLEY SH-POLYPEPTIDE-25

A gentle peptide that may help improve skin firmness and reduce fine lines, with good tolerability for most skin types.

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In plain English

Barley SH-Polypeptide-25 is a lab-made peptide inspired by a protein found in barley. Peptides are short chains of amino acids that act as signaling molecules for skin cells. In skincare, this ingredient is thought to encourage the skin to produce more collagen and elastin, which are proteins that keep skin plump and firm. As we age, collagen production slows down, leading to wrinkles and sagging. This peptide aims to help counteract that process. It is generally well-tolerated and unlikely to clog pores or cause irritation.

Quick decision guide

Useful, but context matters

Barley SH-Polypeptide-25 is generally a lower-concern ingredient when the full formula suits your skin.

Plain-English read

Treat this as a practical screening step before you compare products that contain this ingredient.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging Barley SH-Polypeptide-25.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.

Score terms in plain English

Irritation risk

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

A synthetic peptide (short chain of amino acids) engineered to mimic a fragment of barley protein. It is produced through biotechnology, not extracted directly from barley plants.

How it works

When applied topically, the peptide is believed to bind to receptors on skin cells and trigger signals that boost collagen and elastin synthesis. This can help improve skin firmness, elasticity, and reduce the appearance of fine lines over time.

Pros

Gentle on skin

Barley SH-Polypeptide-25 has a low irritation risk, making it suitable for sensitive skin types that may react to stronger anti-aging ingredients.

Supports collagen production

It signals skin cells to produce more collagen and elastin, which can help maintain skin firmness and reduce fine lines over time.

Cons and cautions

Gradual results

Peptides work slowly and consistently; visible improvements in firmness may take several weeks to months of regular use.

Limited independent research

While peptide technology is well-studied, specific studies on Barley SH-Polypeptide-25 are less abundant compared to classic peptides like Matrixyl.

Best for

  • Anyone looking for a gentle anti-aging ingredient to improve skin firmness
  • People with sensitive or reactive skin who cannot tolerate stronger actives like retinoids
  • Those wanting to add a peptide to their routine for preventive anti-aging

Use caution if

  • Individuals with a known allergy to barley or barley-derived ingredients (though this is synthetic, cross-reactivity is possible but rare)
  • Those seeking immediate or dramatic results—peptides work gradually

Usage tips

Apply after cleansing and toning, before heavier creams or oils, to allow the peptide to absorb effectively.
Use consistently twice daily for best results; peptides work cumulatively over time.
Pair with a moisturizer containing ceramides or niacinamide to support the skin barrier and enhance peptide benefits.

Safety summary

Barley SH-Polypeptide-25 is considered safe for topical cosmetic use. It has low irritation and comedogenic potential. No significant safety concerns have been reported in the available literature.

Research notes

Peptides in general have moderate evidence supporting their ability to stimulate collagen synthesis and improve skin firmness. Specific studies on Barley SH-Polypeptide-25 are limited, but the mechanism is consistent with well-studied peptide technologies.

Common label clues

Typical concentration
0.1% to 1% in leave-on products
Regulatory status
Approved for cosmetic use in the EU, US, and other major markets. It is not a drug ingredient and is not regulated as a pharmaceutical.
Common uses
Anti-aging serums, Firming creams, Eye treatments
Environmental note
Produced via biotechnology, which generally has a lower environmental footprint than plant extraction. No known concerns about sustainability or biodegradability.

Good to know

  • This ingredient is often listed near the middle or end of an ingredient list, as it is effective at low concentrations.
  • It is compatible with most other skincare ingredients, including vitamin C and hyaluronic acid, but avoid using with very low pH formulas (pH below 4) that may degrade peptides.

Common questions

What is Barley SH-Polypeptide-25 in beauty products?

Barley SH-Polypeptide-25 is a lab-made peptide inspired by a protein found in barley. Peptides are short chains of amino acids that act as signaling molecules for skin cells. In skincare, this ingredient is thought to encourage the skin to produce more collagen and elastin, which are proteins that keep skin plump and firm. As we age, collagen production slows down, leading to wrinkles and sagging. This peptide aims to help counteract that process. It is generally well-tolerated and unlikely to clog pores or cause irritation.

What does Barley SH-Polypeptide-25 do in a beauty product?

When applied topically, the peptide is believed to bind to receptors on skin cells and trigger signals that boost collagen and elastin synthesis. This can help improve skin firmness, elasticity, and reduce the appearance of fine lines over time.

Is Barley SH-Polypeptide-25 safe for most people?

Barley SH-Polypeptide-25 is considered safe for topical cosmetic use. It has low irritation and comedogenic potential. No significant safety concerns have been reported in the available literature.

Who should be careful with Barley SH-Polypeptide-25?

Individuals with a known allergy to barley or barley-derived ingredients (though this is synthetic, cross-reactivity is possible but rare) Those seeking immediate or dramatic results—peptides work gradually

Research sources

Cosmetic Ingredient Review (CIR) - Safety of PeptidesOpenPubMed - Peptides in CosmeticsOpenINCI Database - Barley SH-Polypeptide-25Open

Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.