Ingredient review
SH-Polypeptide-46
INCI: SH-Polypeptide-46
SH-Polypeptide-46 is a lab-made peptide that signals skin cells to boost collagen, helping smooth wrinkles over time with minimal irritation.
In plain English
Think of SH-Polypeptide-46 as a tiny messenger that tells your skin cells, 'Hey, it's time to make more collagen and elastin.' Collagen and elastin are the proteins that keep skin plump and springy. As we age, our skin makes less of them, leading to sagging and fine lines. This peptide doesn't do the work itself—it just encourages your skin to do its job better. You won't see results overnight; it takes consistent use over weeks to months.
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-46 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-46.
- 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-46 is a short chain of amino acids (a peptide) created in a lab. It is designed to mimic naturally occurring signaling peptides in the skin that trigger collagen production.
How it works
When applied topically, SH-Polypeptide-46 binds to receptors on skin cells (fibroblasts) and sends a signal to ramp up the production of collagen and other structural proteins. This helps reinforce the skin's support network, leading to firmer, smoother skin over time.
Pros
Gentle on skin
SH-Polypeptide-46 has a low irritation and comedogenic risk, making it suitable for sensitive and acne-prone skin types.
Supports natural collagen
Instead of forcing results, it encourages your skin's own repair processes, leading to more natural-looking improvements in firmness.
Cons and cautions
Slow results
You'll need to use the product consistently for several weeks to months before noticing visible changes in fine lines.
Variable effectiveness
The concentration and overall formula matter a lot—a low-quality product may not deliver enough peptide to make a difference.
Best for
- Adults looking for a gentle anti-aging ingredient
- Those with sensitive skin who want to avoid stronger actives like retinol
Use caution if
- Anyone allergic to synthetic peptides (rare)
- Those expecting immediate or dramatic results
Usage tips
Safety summary
SH-Polypeptide-46 is considered safe for cosmetic use at typical concentrations. It has a low potential for skin irritation and is not known to be comedogenic. As with any new ingredient, a patch test is recommended for those with very sensitive skin.
Research notes
While specific studies on SH-Polypeptide-46 are limited, the broader class of signaling peptides has been shown in clinical studies to modestly improve skin firmness and reduce wrinkle depth over 8–12 weeks. More research is needed to confirm its efficacy compared to other peptides.
Common label clues
- Typical concentration
- 0.001% to 0.1%
- Regulatory status
- Approved as a cosmetic ingredient in the US, EU, and other major markets. It is not classified as a drug and does not require FDA pre-market approval.
- Common uses
- Anti-aging serums, Eye creams, Firming lotions
- Environmental note
- As a synthetic peptide, it is produced in controlled laboratory conditions, which generally has a lower environmental footprint than harvesting natural ingredients.
Good to know
- Peptides are often listed near the end of ingredient lists because they are effective at very low concentrations.
- SH-Polypeptide-46 is sometimes combined with other peptides for a broader anti-aging effect.
Common questions
What is SH-Polypeptide-46 in beauty products?
Think of SH-Polypeptide-46 as a tiny messenger that tells your skin cells, 'Hey, it's time to make more collagen and elastin.' Collagen and elastin are the proteins that keep skin plump and springy. As we age, our skin makes less of them, leading to sagging and fine lines. This peptide doesn't do the work itself—it just encourages your skin to do its job better. You won't see results overnight; it takes consistent use over weeks to months.
What does SH-Polypeptide-46 do in a beauty product?
When applied topically, SH-Polypeptide-46 binds to receptors on skin cells (fibroblasts) and sends a signal to ramp up the production of collagen and other structural proteins. This helps reinforce the skin's support network, leading to firmer, smoother skin over time.
Is SH-Polypeptide-46 safe for most people?
SH-Polypeptide-46 is considered safe for cosmetic use at typical concentrations. It has a low potential for skin irritation and is not known to be comedogenic. As with any new ingredient, a patch test is recommended for those with very sensitive skin.
Who should be careful with SH-Polypeptide-46?
Anyone allergic to synthetic peptides (rare) Those expecting immediate or dramatic results
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.