Ingredient · Surface Film and Plant Protein
Hydrolysed Rice Protein
INCI · Hydrolyzed Rice Protein
Hydrolysed rice protein (INCI: Hydrolyzed Rice Protein) is a water-soluble hydrolysate of protein from rice (Oryza sativa), broken into small peptides and amino acids. Its plant origin makes it popular in formulas favouring plant proteins, particularly hair products seeking body and fullness. It works like other hydrolysed proteins: small peptides adhere to the strand and leave a thin film, giving temporary body, fullness, cuticle smoothness and shine. Water binding also contributes to a soft, moist surface feel. The most common misunderstanding is that rice protein permanently thickens the strand. The observed fullness is a surface film and temporary appearance, not a permanent change in diameter; 'permanent thickening' is not a cosmetic claim. This does not make it non-functional: temporary body and feel are useful for those who appreciate fine hair. Layering a protein-heavy routine without moisture balance can make some hair feel stiff, so moisture and protein balance are assessed together. As a mixture of variable molecular weight, hydrolysed rice protein has no single CID record; its reference framework uses general source families. Klaris considers the temporary nature of body appearance alongside the whole formula.
i. Cosmetic Functions
Frequently Discussed Effects
The following headings summarise areas of effect frequently discussed in the literature; visible results in each area require regular use and a suitable formula.
Body and Fullness
A film on the strand supports temporary body and fullness, a feel often sought by those who appreciate fine hair.
Surface Smoothness and Shine
Contributes to a smoother, shinier-looking cuticle surface.
A Moisturised Feel
Its water-binding tendency supports a soft, moist surface feel.
Mechanism
What Happens Within the Skin?
The following points summarise mechanisms from dermocosmetic literature in plain English. Klaris presents them as background information to help readers understand the context, not as medical claims.
Step 1
Plant Peptide and Amino Acid Mixture
Rice protein broken into small, water-soluble pieces; a mixture of variable molecular weight.
Step 2
Surface Film and Body
A film on the strand provides temporary body, fullness and shine.
Step 3
Temporary Surface Effects
Effects remain temporary and at the surface, without permanently changing strand diameter.
ii. Role in the Formula
How Is It Read on a Label?
Hydrolysed rice protein is the water-soluble form of rice protein broken into low-molecular-weight peptides and amino acids. Shampoos, conditioners, masks and volume-focused products use it for body, fullness and shine. Effects are superficial and temporary, not permanently changing strand diameter. Its plant origin makes it common in formulas favouring plant proteins.
Typical Concentration Range
0.5% - 5% (depending on formula context)
Ingredient Family
Proteins
iii. Sensitivity Advisory
A Note on Extra Care in Context
Hydrolysed rice protein is generally well tolerated. Layering many protein products without moisture balance can make some hair feel stiff; considering moisture and protein balance together is measured.
A sensitivity advisory is not an instruction for use; where individual health circumstances, pregnancy or known sensitivities are involved, discussing the decision with your doctor may be a more contextual approach.
Scientific Basis
Sources and Their Scope
The following headings indicate areas of research; they are not citations of a specific publication or confirmation that every statement on this page has been verified. The links provided should be read with their individual scope in mind.
- International INCI / CosIng database
- Dermocosmetic research publications
- Formulation chemistry guides
Starting Points for Independent Research
These links lead to official databases and serve as starting points for searches.
iv. Related Ingredients
Ingredients Often Read Together
v. Proteins Family
Other Ingredients in the Same Family
Explore ingredients in the same functional family to deepen your reading of formulas.
vi. Academy · Related Reading
For a Closer Look
6 Min Read
How to Read an INCI List on a Hair Product
Familiar ingredient families in shampoo, conditioner and masks, and how the context of the same list changes with your Hair Identity.
6 Min Read
Fine and Thick Hair: How to Read the Ingredients
Strand thickness, tolerance for weight and the appearance of volume: key ingredient families for fine and thick strands.
6 Min Read
Curly Hair Care: How to Read the Ingredients
Curls change how moisture is distributed along the strand: humectant and emollient families, frizz tendencies and the context of washing.
vii. Related Concern Guides
Guides That Include This Ingredient
Klaris · Example Analyses
How Does Hydrolysed Rice Protein Feature
in Your Products?
Explore product examples to see the ingredient list, general assessment and match score that changes with the example profile together.
Masked products and example profiles, not a personal analysis. Profile matching in the app is part of Klaris Premium. The app is currently available in Turkish. An English version is in preparation.