Ingredient review
SH-Polypeptide-89
INCI: SH-Polypeptide-89
SH-Polypeptide-89 is a lab-made peptide that may help improve skin firmness and hydration, but research is still emerging.
In plain English
SH-Polypeptide-89 is a short chain of amino acids (the building blocks of proteins) made in a lab. In skincare, it's added to products like serums and creams with the idea that it can signal skin cells to produce more collagen and other supportive proteins. This could help make skin feel firmer and look more plump over time. Think of it as a tiny messenger that tells your skin to keep itself strong and hydrated.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
SH-Polypeptide-89 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 SH-Polypeptide-89.
- 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
moderateThere is useful support, but formula details and claim strength still matter.
What it is
SH-Polypeptide-89 is a synthetic peptide, meaning it's a man-made chain of amino acids designed to mimic natural signaling molecules in the skin.
How it works
When applied topically, SH-Polypeptide-89 is thought to bind to receptors on skin cells, triggering a cascade that encourages collagen synthesis and improves the skin's moisture barrier. This can lead to reduced appearance of fine lines and better hydration retention.
Pros
Low irritation
SH-Polypeptide-89 is generally non-irritating and suitable for sensitive skin types.
Hydration support
It may help strengthen the skin barrier, leading to better moisture retention and a plumper appearance.
Cons and cautions
Subtle effects
Results are typically gradual and may not be as dramatic as retinoids or other active ingredients.
Limited evidence
While promising, the research on SH-Polypeptide-89 specifically is not as extensive as for some other peptides.
Best for
- People looking for gentle anti-aging support
- Those with dry or dehydrated skin wanting extra hydration
Use caution if
- Individuals with known allergies to synthetic peptides (rare)
- Those expecting dramatic, instant results
Usage tips
Safety summary
SH-Polypeptide-89 is considered safe for topical use in cosmetics. It has a low risk of irritation or allergic reactions, though patch testing is always recommended for new products.
Research notes
Research on SH-Polypeptide-89 is moderate. In vitro studies suggest it can stimulate collagen production, but human clinical trials are limited. It is part of a broader class of peptides with established anti-aging benefits.
Common label clues
- Typical concentration
- Typically used at 0.1% to 2% in leave-on products
- Regulatory status
- Generally recognized as safe for cosmetic use in the EU and US, subject to standard cosmetic ingredient regulations.
- Common uses
- Anti-aging serums, Firming creams, Hydrating treatments
- Environmental note
- As a synthetic peptide, it is produced in controlled lab conditions, which reduces environmental impact compared to some natural extracts, but its biodegradability is not well documented.
Good to know
- Peptides like SH-Polypeptide-89 are often combined with other anti-aging ingredients like niacinamide or hyaluronic acid
- It is stable in most formulations but avoid mixing with very low pH products (like strong AHAs) immediately before application
Common questions
What is SH-Polypeptide-89 in beauty products?
SH-Polypeptide-89 is a short chain of amino acids (the building blocks of proteins) made in a lab. In skincare, it's added to products like serums and creams with the idea that it can signal skin cells to produce more collagen and other supportive proteins. This could help make skin feel firmer and look more plump over time. Think of it as a tiny messenger that tells your skin to keep itself strong and hydrated.
What does SH-Polypeptide-89 do in a beauty product?
When applied topically, SH-Polypeptide-89 is thought to bind to receptors on skin cells, triggering a cascade that encourages collagen synthesis and improves the skin's moisture barrier. This can lead to reduced appearance of fine lines and better hydration retention.
Is SH-Polypeptide-89 safe for most people?
SH-Polypeptide-89 is considered safe for topical use in cosmetics. It has a low risk of irritation or allergic reactions, though patch testing is always recommended for new products.
Who should be careful with SH-Polypeptide-89?
Individuals with known allergies to synthetic peptides (rare) Those expecting dramatic, instant results
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.