Ingredient review
SH-Polypeptide-101
INCI: SH-Polypeptide-101
A lab-made peptide that may help smooth fine lines and support collagen, but human studies are still limited.
In plain English
SH-Polypeptide-101 is a short chain of amino acids (the building blocks of protein) made in a lab. When applied to skin, it's thought to signal skin cells to produce more collagen and elastin, which can help reduce the look of wrinkles and improve firmness. Think of it as a tiny messenger that tells your skin to act younger.
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
SH-Polypeptide-101 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-101.
- 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, specifically a hexapeptide (six amino acids linked together), designed to mimic naturally occurring signaling peptides in the skin.
How it works
It is believed to penetrate the upper layers of the skin and bind to receptors on fibroblasts, encouraging them to produce more collagen and elastin. This can lead to improved skin texture and a reduction in fine lines over time.
Pros
Gentle on skin
SH-Polypeptide-101 has a low irritation and comedogenic risk, making it suitable for sensitive and acne-prone skin types.
Supports collagen production
By signaling skin cells to produce more collagen, it can help improve skin firmness and reduce fine lines over time.
Cons and cautions
Limited research
Compared to more established peptides, there are fewer peer-reviewed human studies confirming its efficacy, so results may be less predictable.
Gradual results
Visible improvements typically take weeks to months of consistent use, and effects are subtle compared to retinoids or vitamin C.
Best for
- Adults looking for a gentle anti-aging ingredient
- People with sensitive skin who want to avoid stronger actives like retinol
Use caution if
- Those seeking immediate or dramatic wrinkle reduction (results are gradual)
Usage tips
Safety summary
SH-Polypeptide-101 is considered safe for topical use in cosmetics at typical concentrations. 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-101 is still emerging. In vitro studies suggest it can stimulate collagen synthesis, but well-controlled human trials are limited. It is less studied than some other peptide families.
Common label clues
- Typical concentration
- Typically used at 0.5% to 2% in leave-on products
- Regulatory status
- Approved as a cosmetic ingredient in the EU, US, and other major markets. Not classified as a drug ingredient.
- Common uses
- Anti-aging serums, Eye creams, Facial moisturizers
- Environmental note
- As a synthetic peptide, it is produced in controlled laboratory conditions, which reduces environmental impact compared to animal-derived ingredients.
Good to know
- Peptides like SH-Polypeptide-101 are often combined with other anti-aging ingredients such as niacinamide or antioxidants for enhanced benefits.
- Store products containing peptides away from direct sunlight and heat to maintain stability.
Common questions
What is SH-Polypeptide-101 in beauty products?
SH-Polypeptide-101 is a short chain of amino acids (the building blocks of protein) made in a lab. When applied to skin, it's thought to signal skin cells to produce more collagen and elastin, which can help reduce the look of wrinkles and improve firmness. Think of it as a tiny messenger that tells your skin to act younger.
What does SH-Polypeptide-101 do in a beauty product?
It is believed to penetrate the upper layers of the skin and bind to receptors on fibroblasts, encouraging them to produce more collagen and elastin. This can lead to improved skin texture and a reduction in fine lines over time.
Is SH-Polypeptide-101 safe for most people?
SH-Polypeptide-101 is considered safe for topical use in cosmetics at typical concentrations. 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-101?
Those seeking immediate or dramatic wrinkle reduction (results are gradual)
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.