Ingredient review
Rice Rh-Polypeptide-45
INCI: Rice Rh-Polypeptide-45
A gentle, biotech-derived peptide from rice that helps hydrate and condition skin, but research on its specific benefits is still limited.
In plain English
Rice Rh-Polypeptide-45 is a lab-made protein fragment inspired by rice. In skincare, it acts like a sponge to hold water on your skin, helping it feel softer and smoother. Think of it as a modern, high-tech cousin of rice water, but more consistent and targeted.
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
- biotech
- Evidence
- emerging
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Rice Rh-Polypeptide-45 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 Rh-Polypeptide-45.
- 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 recombinant (lab-created) polypeptide derived from rice protein sequences. It is produced through biotechnology, ensuring purity and consistency.
How it works
It forms a thin film on the skin's surface that attracts and retains moisture, reducing water loss. It may also temporarily plump the skin by filling in microscopic gaps between skin cells.
Pros
Gentle hydration
Provides moisture without heavy or sticky feel, suitable for most skin types.
Biotech consistency
Lab production ensures a pure, stable ingredient free from contaminants found in raw plant extracts.
Cons and cautions
Limited research
Specific clinical data on Rice Rh-Polypeptide-45 is sparse; most evidence comes from related rice peptides.
Variable efficacy
Its performance depends heavily on the overall formula and concentration used.
Best for
- People with dry or dehydrated skin
- Those looking for a gentle, plant-inspired peptide
Use caution if
- Individuals with known allergies to rice or fermented rice products (rare)
Usage tips
Safety summary
Considered safe for topical use with low irritation and allergy potential. No significant safety concerns reported in cosmetic concentrations.
Research notes
Research on rice-derived peptides suggests moisturizing and antioxidant potential, but direct studies on Rice Rh-Polypeptide-45 are limited. Most evidence is extrapolated from similar bioengineered peptides.
Common label clues
- Typical concentration
- 0.1% to 2%
- Regulatory status
- Generally recognized as safe for cosmetic use in the US and EU when used as directed. No specific restrictions.
- Common uses
- Serums, Moisturizers, Anti-aging creams
- Environmental note
- Biotech production typically has a lower environmental footprint than harvesting raw plant materials, though energy use varies by manufacturer.
Good to know
- This ingredient is often found in 'clean beauty' or 'fermented skincare' products.
- It is not the same as whole rice protein; it's a specific fragment designed for skin.
Common questions
What is Rice Rh-Polypeptide-45 in beauty products?
Rice Rh-Polypeptide-45 is a lab-made protein fragment inspired by rice. In skincare, it acts like a sponge to hold water on your skin, helping it feel softer and smoother. Think of it as a modern, high-tech cousin of rice water, but more consistent and targeted.
What does Rice Rh-Polypeptide-45 do in a beauty product?
It forms a thin film on the skin's surface that attracts and retains moisture, reducing water loss. It may also temporarily plump the skin by filling in microscopic gaps between skin cells.
Is Rice Rh-Polypeptide-45 safe for most people?
Considered safe for topical use with low irritation and allergy potential. No significant safety concerns reported in cosmetic concentrations.
Who should be careful with Rice Rh-Polypeptide-45?
Individuals with known allergies to rice or fermented rice products (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.