Ingredient review
SH-Polypeptide-44
INCI: SH-Polypeptide-44
A synthetic peptide that signals skin to produce more collagen, helping reduce fine lines and improve firmness with low irritation risk.
In plain English
SH-Polypeptide-44 is a lab-made chain of amino acids (the building blocks of protein) that acts like a messenger to your skin cells. When applied in a cream or serum, it tells your skin to make more collagen and elastin, which are the proteins that keep skin plump and springy. Think of it as a gentle nudge to your skin's natural repair system, without the harsh side effects of stronger anti-aging ingredients.
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-44 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-44.
- 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-44 is a synthetic peptide, specifically a hexapeptide (made of six amino acids), designed to mimic naturally occurring signaling peptides in the skin. It is produced in a laboratory to ensure purity and consistency.
How it works
When applied topically, SH-Polypeptide-44 binds to receptors on skin cells (fibroblasts) and triggers a cascade of signals that increase the production of collagen and elastin. This helps strengthen the skin's structural support, leading to reduced appearance of fine lines and improved firmness over time.
Pros
Gentle anti-aging
SH-Polypeptide-44 works without the irritation common with stronger ingredients like retinol, making it suitable for sensitive skin types.
Supports natural collagen
It encourages your skin's own collagen production, leading to gradual but lasting improvements in firmness and texture.
Cons and cautions
Slow results
You'll need to use it consistently for several weeks to see visible changes, as it works by nudging natural processes rather than forcing rapid turnover.
Limited potency
For deep wrinkles or significant sagging, peptides alone may not be enough and are best combined with other active ingredients.
Best for
- Anyone looking for a gentle anti-aging ingredient
- People with sensitive skin who cannot tolerate retinoids
Use caution if
- Those seeking immediate or dramatic results
- Individuals allergic to synthetic peptides (rare)
Usage tips
Safety summary
SH-Polypeptide-44 is considered safe for topical use with a low risk of irritation or allergic reaction. It is not known to be comedogenic (pore-clogging) and is well-tolerated even by sensitive skin.
Research notes
While specific studies on SH-Polypeptide-44 are limited, the broader class of signaling peptides has been shown in multiple clinical trials to improve skin firmness and reduce wrinkle depth over 8-12 weeks. Evidence is moderate but supportive.
Common label clues
- Typical concentration
- 0.1% to 1%
- Regulatory status
- Approved as a cosmetic ingredient in the EU, US, and other major markets. Not classified as a drug or medicine.
- Common uses
- Anti-aging serums, Firming creams, Eye treatments
- Environmental note
- Synthetic peptides are produced in controlled lab settings, reducing environmental impact compared to animal-derived ingredients.
Good to know
- Peptides are often listed as 'palmitoyl' or 'acetyl' followed by a number—SH-Polypeptide-44 is one of many synthetic variants.
- It is stable in most formulations and does not require special packaging.
Common questions
What is SH-Polypeptide-44 in beauty products?
SH-Polypeptide-44 is a lab-made chain of amino acids (the building blocks of protein) that acts like a messenger to your skin cells. When applied in a cream or serum, it tells your skin to make more collagen and elastin, which are the proteins that keep skin plump and springy. Think of it as a gentle nudge to your skin's natural repair system, without the harsh side effects of stronger anti-aging ingredients.
What does SH-Polypeptide-44 do in a beauty product?
When applied topically, SH-Polypeptide-44 binds to receptors on skin cells (fibroblasts) and triggers a cascade of signals that increase the production of collagen and elastin. This helps strengthen the skin's structural support, leading to reduced appearance of fine lines and improved firmness over time.
Is SH-Polypeptide-44 safe for most people?
SH-Polypeptide-44 is considered safe for topical use with a low risk of irritation or allergic reaction. It is not known to be comedogenic (pore-clogging) and is well-tolerated even by sensitive skin.
Who should be careful with SH-Polypeptide-44?
Those seeking immediate or dramatic results Individuals allergic 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.