Ingredient review
Rice SH-Polypeptide-9
INCI: Rice SH-Polypeptide-9
A gentle peptide that signals skin to produce more collagen, helping reduce fine lines and improve firmness over time.
In plain English
Rice SH-Polypeptide-9 is a small protein fragment (peptide) made in a lab to mimic a part of rice protein. When applied to skin, it acts like a messenger telling skin cells to build more collagen and elastin, which are the proteins that keep skin plump and firm. It's a milder alternative to retinol and works well for sensitive skin types.
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
- semi synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Rice SH-Polypeptide-9 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 Rice SH-Polypeptide-9.
- 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
A synthetic peptide (short chain of amino acids) derived from rice protein, engineered to be stable and effective in skincare formulas.
How it works
It penetrates the upper layers of skin and binds to receptors on fibroblasts, stimulating them to produce more collagen and elastin. This helps strengthen the skin's support structure, reducing the appearance of fine lines and sagging.
Pros
Gentle anti-aging
Stimulates collagen without irritation, making it suitable for sensitive or reactive skin.
Improves firmness
Regular use can lead to visibly firmer, more resilient skin over several weeks.
Cons and cautions
Slow results
Visible improvements typically take 8–12 weeks of consistent use.
Moderate potency
May not be as effective as stronger peptides or retinoids for deep wrinkles.
Best for
- People with fine lines and loss of firmness
- Sensitive skin types who cannot tolerate retinol
- Those looking for a gentle anti-aging ingredient
Use caution if
- Anyone allergic to rice or rice derivatives (rare)
- Those expecting immediate results
Usage tips
Safety summary
Considered safe for cosmetic use at typical concentrations. Rare allergic reactions possible in individuals with rice allergies. No known toxicity or irritation in standard tests.
Research notes
Clinical studies show statistically significant improvements in skin firmness and wrinkle depth after 8–12 weeks of use. More research is needed comparing it head-to-head with other anti-aging peptides.
Common label clues
- Typical concentration
- 0.1% 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.
- Common uses
- Anti-aging serums, Firming creams, Eye treatments
- Environmental note
- Produced via lab synthesis, reducing agricultural and water footprint compared to extracting peptides from whole rice.
Good to know
- Often listed as 'Rice SH-Polypeptide-9' on ingredient labels; the 'SH' refers to a specific synthetic sequence.
- It is not a whole rice protein but a targeted peptide fragment, so it is unlikely to cause rice allergy reactions.
Common questions
What is Rice SH-Polypeptide-9 in beauty products?
Rice SH-Polypeptide-9 is a small protein fragment (peptide) made in a lab to mimic a part of rice protein. When applied to skin, it acts like a messenger telling skin cells to build more collagen and elastin, which are the proteins that keep skin plump and firm. It's a milder alternative to retinol and works well for sensitive skin types.
What does Rice SH-Polypeptide-9 do in a beauty product?
It penetrates the upper layers of skin and binds to receptors on fibroblasts, stimulating them to produce more collagen and elastin. This helps strengthen the skin's support structure, reducing the appearance of fine lines and sagging.
Is Rice SH-Polypeptide-9 safe for most people?
Considered safe for cosmetic use at typical concentrations. Rare allergic reactions possible in individuals with rice allergies. No known toxicity or irritation in standard tests.
Who should be careful with Rice SH-Polypeptide-9?
Anyone allergic to rice or rice derivatives (rare) Those expecting immediate 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.