Ingredient review
SH-Polypeptide-74
INCI: SH-Polypeptide-74
SH-Polypeptide-74 is a lab-made peptide that may help reduce the look of fine lines by signaling skin cells to act younger, but research is still early.
In plain English
SH-Polypeptide-74 is a short chain of amino acids (the building blocks of protein) made in a lab. In skincare, it acts like a messenger that tells your skin cells to produce more collagen and elastin, which are the proteins that keep skin plump and firm. Think of it as a gentle nudge to your skin's natural repair system. Because it's a large molecule, it works best when the formula helps it penetrate the outer layer of 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
SH-Polypeptide-74 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-74.
- 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 signal peptide, designed to mimic natural signaling molecules in the skin that trigger collagen production.
How it works
When applied topically in a well-formulated product, SH-Polypeptide-74 penetrates the stratum corneum (the outermost skin layer) and binds to receptors on fibroblasts (collagen-making cells). This binding signals the cells to ramp up production of collagen and elastin, which can help improve skin firmness and reduce the appearance of fine lines over time.
Pros
Gentle collagen support
Unlike harsh exfoliants or retinoids, SH-Polypeptide-74 works by signaling skin cells without causing irritation, making it suitable for sensitive skin types.
Compatible with most routines
It layers well under moisturizers and sunscreen, and can be used alongside other anti-aging ingredients without causing negative reactions.
Cons and cautions
Subtle, gradual results
You won't see overnight changes. Consistent use over weeks to months is needed for any visible improvement, and results are typically modest.
Limited independent research
Most studies on SH-Polypeptide-74 are conducted or funded by ingredient suppliers, so independent peer-reviewed human data is scarce.
Best for
- Adults looking for a gentle anti-aging ingredient to support collagen
- People with sensitive skin who cannot tolerate stronger actives like retinoids
Use caution if
- Those seeking immediate or dramatic wrinkle reduction
- Individuals allergic to any peptide-based ingredients (rare)
Usage tips
Safety summary
SH-Polypeptide-74 is considered safe for topical cosmetic use at typical concentrations. Irritation and allergy are rare. There are no known toxicity concerns from properly formulated products.
Research notes
Evidence for SH-Polypeptide-74 is primarily from in vitro (lab) studies and manufacturer-sponsored trials showing increased collagen production. Independent human clinical studies are limited, so the evidence level is considered emerging.
Common label clues
- Typical concentration
- Typically used at 0.1% to 1% in leave-on products
- Regulatory status
- Approved for cosmetic use in the US, EU, and other major markets. It is not classified as a drug ingredient.
- Common uses
- Anti-aging serums, Eye creams, Firming lotions
- Environmental note
- As a synthetic peptide, its environmental impact is minimal compared to some natural extracts, but manufacturing involves chemical synthesis.
Good to know
- Peptides like SH-Polypeptide-74 are often listed near the middle or end of an ingredient list because they are used at low concentrations
- The 'SH' prefix likely refers to the manufacturer or specific peptide sequence
Common questions
What is SH-Polypeptide-74 in beauty products?
SH-Polypeptide-74 is a short chain of amino acids (the building blocks of protein) made in a lab. In skincare, it acts like a messenger that tells your skin cells to produce more collagen and elastin, which are the proteins that keep skin plump and firm. Think of it as a gentle nudge to your skin's natural repair system. Because it's a large molecule, it works best when the formula helps it penetrate the outer layer of skin.
What does SH-Polypeptide-74 do in a beauty product?
When applied topically in a well-formulated product, SH-Polypeptide-74 penetrates the stratum corneum (the outermost skin layer) and binds to receptors on fibroblasts (collagen-making cells). This binding signals the cells to ramp up production of collagen and elastin, which can help improve skin firmness and reduce the appearance of fine lines over time.
Is SH-Polypeptide-74 safe for most people?
SH-Polypeptide-74 is considered safe for topical cosmetic use at typical concentrations. Irritation and allergy are rare. There are no known toxicity concerns from properly formulated products.
Who should be careful with SH-Polypeptide-74?
Those seeking immediate or dramatic wrinkle reduction Individuals allergic to any peptide-based ingredients (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.