Ingredient review
Palmitoyl SH-Polypeptide-109 Cholesterol
INCI: Palmitoyl SH-Polypeptide-109 Cholesterol
A synthetic peptide-cholesterol hybrid that may help improve skin firmness and hydration, but research is still emerging.
In plain English
This ingredient is a lab-made molecule that combines a small protein fragment (peptide) with cholesterol. Peptides are short chains of amino acids that can signal skin cells to produce more collagen, while cholesterol is a natural part of the skin's moisture barrier. Together, they aim to support skin structure and hydration. Think of it as a targeted signal that tells your skin to stay plump and resilient, plus a building block for a healthy barrier.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is still emerging, so marketing claims deserve extra caution.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- synthetic
- Evidence
- emerging
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Palmitoyl SH-Polypeptide-109 Cholesterol 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 Palmitoyl SH-Polypeptide-109 Cholesterol.
- 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 (Palmitoyl SH-Polypeptide-109) chemically linked to cholesterol. The palmitoyl group helps it penetrate the skin, and the cholesterol part mimics natural skin lipids.
How it works
The peptide portion is believed to signal skin cells to boost collagen and elastin production, improving firmness. The cholesterol component helps reinforce the skin's natural lipid barrier, reducing moisture loss and supporting overall skin health.
Pros
Dual action
Combines peptide signaling with cholesterol barrier support, potentially offering both anti-aging and moisturizing benefits in one ingredient.
Low irritation risk
Generally well-tolerated, with low irritation and comedogenic potential, making it suitable for sensitive skin types.
Cons and cautions
Limited research
There are few published human studies on this specific peptide-cholesterol complex, so its efficacy is less established compared to classic peptides.
Cost and availability
As a newer synthetic ingredient, it may be more expensive and less commonly found in drugstore products, often reserved for premium formulations.
Best for
- People looking for anti-aging support with barrier benefits
- Those with dry or mature skin seeking hydration and firmness
Use caution if
- Individuals with known allergies to synthetic peptides or cholesterol derivatives
- Those seeking proven, extensively studied ingredients
Usage tips
Safety summary
Palmitoyl SH-Polypeptide-109 Cholesterol is considered safe for topical use at typical concentrations. It has low irritation and comedogenic potential. However, long-term safety data specific to this compound are limited.
Research notes
Evidence is primarily based on ingredient class (peptides and cholesterol) rather than direct studies on this specific molecule. Early research suggests potential benefits for skin firmness and barrier function, but more human trials are needed.
Common label clues
- Typical concentration
- 0.1% to 2%
- Regulatory status
- Generally recognized as safe for cosmetic use in the US and EU when used as directed. Not classified as a drug ingredient.
- Common uses
- Anti-aging serums, Firming creams, Eye treatments
- Environmental note
- Synthetic production reduces reliance on animal-derived cholesterol, but the environmental impact of peptide synthesis is not well-documented.
Good to know
- Peptides are fragile; avoid using them with very low pH (acidic) products in the same routine.
- Cholesterol is a natural component of healthy skin, so this ingredient mimics what your skin already contains.
Common questions
What is Palmitoyl SH-Polypeptide-109 Cholesterol in beauty products?
This ingredient is a lab-made molecule that combines a small protein fragment (peptide) with cholesterol. Peptides are short chains of amino acids that can signal skin cells to produce more collagen, while cholesterol is a natural part of the skin's moisture barrier. Together, they aim to support skin structure and hydration. Think of it as a targeted signal that tells your skin to stay plump and resilient, plus a building block for a healthy barrier.
What does Palmitoyl SH-Polypeptide-109 Cholesterol do in a beauty product?
The peptide portion is believed to signal skin cells to boost collagen and elastin production, improving firmness. The cholesterol component helps reinforce the skin's natural lipid barrier, reducing moisture loss and supporting overall skin health.
Is Palmitoyl SH-Polypeptide-109 Cholesterol safe for most people?
Palmitoyl SH-Polypeptide-109 Cholesterol is considered safe for topical use at typical concentrations. It has low irritation and comedogenic potential. However, long-term safety data specific to this compound are limited.
Who should be careful with Palmitoyl SH-Polypeptide-109 Cholesterol?
Individuals with known allergies to synthetic peptides or cholesterol derivatives Those seeking proven, extensively studied ingredients
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.