Ingredient review
Barley SH-Polypeptide-1
INCI: BARLEY SH-POLYPEPTIDE-1
A plant-derived peptide that may help improve skin firmness and hydration, but research is still early.
In plain English
Barley SH-Polypeptide-1 is a small protein fragment made from barley. In skincare, peptides act like messengers that tell skin cells to produce more collagen and elastin, which help keep skin plump and firm. Because it comes from barley, it's a plant-based alternative to animal-derived peptides. However, the evidence for this specific ingredient is still building, so results can vary.
Quick decision guide
Useful, but context matters
Barley SH-Polypeptide-1 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.
- Step 1Start with the score, then check the irritation and clogging risk before judging Barley SH-Polypeptide-1.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- 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
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
emergingThe ingredient may be promising, but claims should be treated more cautiously.
What it is
A synthetic peptide derived from barley protein, designed to mimic signaling peptides that support collagen production and skin repair.
How it works
When applied topically, the peptide is thought to bind to receptors on skin cells, triggering signals that boost collagen and elastin synthesis. This can help improve skin firmness, reduce fine lines, and support the skin's moisture barrier over time.
Pros
Plant-based peptide
Derived from barley, it offers a vegan-friendly alternative to animal-derived peptides, appealing to those seeking sustainable skincare.
Gentle on skin
With a low irritation and comedogenic risk, it is suitable for sensitive and acne-prone skin types without clogging pores.
Cons and cautions
Limited research
Most evidence comes from lab studies or analog peptides; large-scale human trials on Barley SH-Polypeptide-1 are scarce, so efficacy is not fully proven.
Higher cost
As a specialty biotech ingredient, products containing it tend to be more expensive than those with well-established peptides.
Best for
- People looking for plant-based anti-aging ingredients
- Those with sensitive skin who want a gentle peptide option
Use caution if
- Anyone with a known allergy to barley or gluten (though topical absorption is minimal)
Usage tips
Safety summary
Barley SH-Polypeptide-1 is considered safe for topical use with low irritation and comedogenic risk. Those with severe gluten allergies may wish to patch test, though transdermal absorption of gluten proteins is minimal.
Research notes
Research on barley-derived peptides in skincare is emerging. Early in vitro studies suggest collagen-stimulating potential, but robust clinical trials on this specific peptide are lacking. Evidence is extrapolated from similar peptide technologies.
Common label clues
- Typical concentration
- 0.001% to 0.1%
- Regulatory status
- Generally recognized as safe for cosmetic use in the EU and US when formulated within typical concentrations. Not a drug ingredient.
- Common uses
- Anti-aging serums, Firming creams, Eye treatments
- Environmental note
- Barley is a widely cultivated crop with a lower water footprint than some other plant sources, making this peptide a relatively sustainable choice.
Good to know
- Peptides work best when combined with other barrier-supporting ingredients like niacinamide or ceramides.
- Store products with peptides away from direct sunlight and heat to maintain stability.
Common questions
What is Barley SH-Polypeptide-1 in beauty products?
Barley SH-Polypeptide-1 is a small protein fragment made from barley. In skincare, peptides act like messengers that tell skin cells to produce more collagen and elastin, which help keep skin plump and firm. Because it comes from barley, it's a plant-based alternative to animal-derived peptides. However, the evidence for this specific ingredient is still building, so results can vary.
What does Barley SH-Polypeptide-1 do in a beauty product?
When applied topically, the peptide is thought to bind to receptors on skin cells, triggering signals that boost collagen and elastin synthesis. This can help improve skin firmness, reduce fine lines, and support the skin's moisture barrier over time.
Is Barley SH-Polypeptide-1 safe for most people?
Barley SH-Polypeptide-1 is considered safe for topical use with low irritation and comedogenic risk. Those with severe gluten allergies may wish to patch test, though transdermal absorption of gluten proteins is minimal.
Who should be careful with Barley SH-Polypeptide-1?
Anyone with a known allergy to barley or gluten (though topical absorption is minimal)
Research sources
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.