Ingredient review
Methionyl SH-Polypeptide-93
INCI: METHIONYL SH-POLYPEPTIDE-93
A lab-made peptide that may help support collagen and firm skin, but human studies are still limited.
In plain English
This is a synthetic peptide, which is a short chain of amino acids (the building blocks of proteins). It is designed to signal skin cells to behave more youthfully, potentially boosting collagen production and improving firmness. Because it is a large molecule, it is often formulated with delivery systems to help it penetrate the skin.
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
Methionyl SH-Polypeptide-93 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 Methionyl SH-Polypeptide-93.
- 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 engineered in a lab, consisting of a methionine amino acid attached to a specific polypeptide sequence (SH-Polypeptide-93). It belongs to a class of signal peptides that mimic natural protein fragments to communicate with skin cells.
How it works
When applied topically, the peptide is thought to bind to receptors on skin cells and trigger a cascade of signals that encourage collagen and elastin synthesis. Over time, this can help improve skin density, reduce the depth of wrinkles, and enhance overall firmness.
Pros
Targeted anti-aging action
Designed to mimic natural signaling molecules, potentially boosting collagen without the irritation of stronger actives.
Low irritation profile
Generally well-tolerated even on sensitive skin, making it a gentler option for daily anti-aging routines.
Cons and cautions
Limited human evidence
Most data comes from lab or animal studies; robust human trials are scarce, so real-world results may vary.
Formulation-dependent
Peptides are large and fragile; without a proper delivery system, they may not penetrate deeply enough to be effective.
Best for
- Adults looking to address early signs of aging
- Those wanting a gentle alternative to retinol for firming
Use caution if
- Individuals with known allergies to synthetic peptides (rare)
Usage tips
Safety summary
Considered safe for topical use at typical cosmetic concentrations. Irritation and allergic reactions are rare, but patch testing is recommended for new products.
Research notes
Evidence is primarily from in vitro and preliminary studies suggesting collagen-stimulating potential. More rigorous human clinical trials are needed to confirm efficacy.
Common label clues
- Typical concentration
- Typically used at very low levels, often below 1%
- Regulatory status
- Approved for use in cosmetics in the US and EU; not classified as a drug ingredient.
- Common uses
- Anti-aging serums, Firming creams, Eye treatments
- Environmental note
- Synthetic peptides are produced in controlled lab settings, which reduces environmental impact compared to animal-derived ingredients.
Good to know
- Peptides are often listed near the end of ingredient lists because they are used at low concentrations.
- Combining peptides with antioxidants like vitamin C may enhance their anti-aging effects.
Common questions
What is Methionyl SH-Polypeptide-93 in beauty products?
This is a synthetic peptide, which is a short chain of amino acids (the building blocks of proteins). It is designed to signal skin cells to behave more youthfully, potentially boosting collagen production and improving firmness. Because it is a large molecule, it is often formulated with delivery systems to help it penetrate the skin.
What does Methionyl SH-Polypeptide-93 do in a beauty product?
When applied topically, the peptide is thought to bind to receptors on skin cells and trigger a cascade of signals that encourage collagen and elastin synthesis. Over time, this can help improve skin density, reduce the depth of wrinkles, and enhance overall firmness.
Is Methionyl SH-Polypeptide-93 safe for most people?
Considered safe for topical use at typical cosmetic concentrations. Irritation and allergic reactions are rare, but patch testing is recommended for new products.
Who should be careful with Methionyl SH-Polypeptide-93?
Individuals with known allergies to synthetic peptides (rare)
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.