At ORY®, we believe you should know what’s in your products and why. This page lists the published research behind what we say about hydrolyzed wheat protein. Each section starts with our claim, then tells you how well the research supports it, then lists the sources so you can read them yourself.
Allergy notice — contains wheat: In Japan, a facial soap containing a high-molecular-weight hydrolyzed wheat protein caused new wheat allergy in many users, including serious reactions (anaphylaxis) after eating wheat. ORY® uses only certified low-molecular-weight grades, never in soap or facial cleansers, and declares wheat on the label. People with wheat allergy or celiac disease should avoid these products.
How to read this page Supported — backed by peer-reviewed research or official safety reviews. Supported, with caveats — the research points this way, but mostly from laboratory or animal studies, or at different strengths than ORY® uses. Limited evidence — little or no published research yet. We say so openly. |
1. General Description and Role
Claim: Hydrolyzed wheat protein is wheat protein broken into small peptides. In ORY® Haircare, it helps fine hair look fuller and helps hair feel moisturized, smooth, and shiny. |
Verification: Supported, with caveats. The Cosmetic Ingredient Review (CIR) Expert Panel concluded that hydrolyzed wheat protein is safe when formulated to restrict peptides to an average molecular weight of 3,500 Da or less. ORY® uses only grades that meet that limit.
Citations:
- Burnett, C. L., et al. (2018). Safety assessment of hydrolyzed wheat protein and wheat gluten as used in cosmetics. International Journal of Toxicology, 37(1 Suppl), 55S–66S (safe when formulated to restrict peptides to an average molecular weight of 3,500 Da or less). https://doi.org/10.1177/1091581818776013
- What it shows: CIR safety assessment (2018).
- Burnett, C. L., et al. (2018). Safety assessment of hydrolyzed wheat protein and wheat gluten as used in cosmetics. International Journal of Toxicology, 37(1 Suppl), 55S–66S (safe when formulated to restrict peptides to an average molecular weight of 3,500 Da or less). https://doi.org/10.1177/1091581818776013
2. Composition and Production
Claim: It is made by enzyme (preferred) or acid hydrolysis of wheat gluten and standardized by molecular weight. It contains gluten-derived peptides and is not gluten-free. |
Verification: Supported. Molecular weight is the key safety factor: the soap that caused allergy in Japan contained a large-molecule, acid-hydrolyzed wheat protein.
Citations:
- Burnett, C. L., et al. (2018). Safety assessment of hydrolyzed wheat protein and wheat gluten as used in cosmetics. International Journal of Toxicology, 37(1 Suppl), 55S–66S (safe when formulated to restrict peptides to an average molecular weight of 3,500 Da or less). https://doi.org/10.1177/1091581818776013
- What it shows: Molecular weight limit.
- Chinuki, Y., & Morita, E. (2012). Wheat-dependent exercise-induced anaphylaxis sensitized with hydrolyzed wheat protein in soap. Allergology International, 61(4), 529–537. https://pubmed.ncbi.nlm.nih.gov/?term=Wheat-dependent%20exercise-induced%20anaphylaxis%20sensitized%20with%20hydrolyzed%20wheat%20protein%20in%20soap
- What it shows: Review of the Japanese soap cases.
- Burnett, C. L., et al. (2018). Safety assessment of hydrolyzed wheat protein and wheat gluten as used in cosmetics. International Journal of Toxicology, 37(1 Suppl), 55S–66S (safe when formulated to restrict peptides to an average molecular weight of 3,500 Da or less). https://doi.org/10.1177/1091581818776013
3. Skin Type Suitability
Claim: ORY® uses hydrolyzed wheat protein only in a few leave-on body and hand products and prefers oat or rice protein for skin. |
Verification: Supported, with caveats. Reports describe immediate allergic reactions to hydrolyzed wheat protein in cosmetics, and new wheat allergy from a facial soap. Broken or inflamed skin and cleansing products increase the risk.
Citations:
- Laurière, M., Pecquet, C., Bouchez-Mahiout, I., et al. (2006). Hydrolysed wheat proteins present in cosmetics can induce immediate hypersensitivities. Contact Dermatitis, 54(5), 283–289. https://pubmed.ncbi.nlm.nih.gov/?term=Hydrolysed%20wheat%20proteins%20present%20in%20cosmetics%20can%20induce%20immediate%20hypersensitivities
- What it shows: Reports of immediate reactions to cosmetics.
- Fukutomi, Y., Itagaki, Y., Taniguchi, M., et al. (2011). Rhinoconjunctival sensitization to hydrolyzed wheat protein in facial soap can induce wheat-dependent exercise-induced anaphylaxis. Journal of Allergy and Clinical Immunology, 127(2), 531–533. https://pubmed.ncbi.nlm.nih.gov/?term=Rhinoconjunctival%20sensitization%20to%20hydrolyzed%20wheat%20protein%20in%20facial%20soap%20can%20induce%20wheat-dependent%20exercise-induced%20anaphylaxis
- What it shows: Facial soap sensitization report.
- Chinuki, Y., & Morita, E. (2012). Wheat-dependent exercise-induced anaphylaxis sensitized with hydrolyzed wheat protein in soap. Allergology International, 61(4), 529–537. https://pubmed.ncbi.nlm.nih.gov/?term=Wheat-dependent%20exercise-induced%20anaphylaxis%20sensitized%20with%20hydrolyzed%20wheat%20protein%20in%20soap
- What it shows: Review of the soap cases.
- Laurière, M., Pecquet, C., Bouchez-Mahiout, I., et al. (2006). Hydrolysed wheat proteins present in cosmetics can induce immediate hypersensitivities. Contact Dermatitis, 54(5), 283–289. https://pubmed.ncbi.nlm.nih.gov/?term=Hydrolysed%20wheat%20proteins%20present%20in%20cosmetics%20can%20induce%20immediate%20hypersensitivities
4. Hair and Scalp Suitability
Claim: In haircare, hydrolyzed wheat protein helps fine hair look fuller and feel moisturized and smooth. |
Verification: Supported, with caveats. Reviews describe film-forming proteins that bind moisture and add body; we found no clinical trial of this ingredient on hair.
Citations:
- Secchi, G. (2008). Role of protein in cosmetics. Clinics in Dermatology, 26(4), 321–325. https://pubmed.ncbi.nlm.nih.gov/18691510/
- What it shows: Review of protein in cosmetics.
- Gavazzoni Dias, M. F. R. (2015). Hair cosmetics: An overview. International Journal of Trichology, 7(1), 2–15. https://pubmed.ncbi.nlm.nih.gov/25878443/
- What it shows: Review of hair cosmetics.
- Secchi, G. (2008). Role of protein in cosmetics. Clinics in Dermatology, 26(4), 321–325. https://pubmed.ncbi.nlm.nih.gov/18691510/
5. Benefits
Claim: Hydrolyzed wheat protein adds body, moisture, and shine to hair. |
Verification: Supported, with caveats. Evidence comes from protein-cosmetics research. Safety depends on using low-molecular-weight grades and avoiding cleansers.
Citations:
- Secchi, G. (2008). Role of protein in cosmetics. Clinics in Dermatology, 26(4), 321–325. https://pubmed.ncbi.nlm.nih.gov/18691510/
- What it shows: Review.
- Burnett, C. L., et al. (2018). Safety assessment of hydrolyzed wheat protein and wheat gluten as used in cosmetics. International Journal of Toxicology, 37(1 Suppl), 55S–66S (safe when formulated to restrict peptides to an average molecular weight of 3,500 Da or less). https://doi.org/10.1177/1091581818776013
- What it shows: Safety conditions.
- Secchi, G. (2008). Role of protein in cosmetics. Clinics in Dermatology, 26(4), 321–325. https://pubmed.ncbi.nlm.nih.gov/18691510/
6. Use Across ORY® Product Lines
Claim: Hydrolyzed wheat protein is used mainly in ORY® Haircare, with limited leave-on skincare and cosmetics use. |
Verification: Supported. It is never used in soap or facial cleansers.
| Product line | Typical level | How ORY® uses it |
| Skincare | up to 1% (low-MW) | A few leave-on body lotions and hand creams; never facial cleansers. |
| Haircare | 0.5–3% (low-MW) | Volumizing conditioners, masks, leave-ins, and shampoos. |
| Handmade Soap | Not used | Excluded from all soap and cleansing bars. |
| Cosmetics | 0.5–1% (low-MW) | Mascaras and non-cleansing products; wheat declared. |
Citations:
- Burnett, C. L., et al. (2018). Safety assessment of hydrolyzed wheat protein and wheat gluten as used in cosmetics. International Journal of Toxicology, 37(1 Suppl), 55S–66S (safe when formulated to restrict peptides to an average molecular weight of 3,500 Da or less). https://doi.org/10.1177/1091581818776013
- What it shows: Reported uses.
- Chinuki, Y., & Morita, E. (2012). Wheat-dependent exercise-induced anaphylaxis sensitized with hydrolyzed wheat protein in soap. Allergology International, 61(4), 529–537. https://pubmed.ncbi.nlm.nih.gov/?term=Wheat-dependent%20exercise-induced%20anaphylaxis%20sensitized%20with%20hydrolyzed%20wheat%20protein%20in%20soap
- What it shows: Soap cases.
- U.S. Food and Drug Administration. 21 CFR 701.20 — Definition of “soap” (only true soap, made mainly of alkali salts of fatty acids and sold only as soap, is exempt from cosmetic rules). https://www.ecfr.gov/current/title-21/chapter-I/subchapter-G/part-701/subpart-B/section-701.20
- What it shows: FDA definition of soap; other bars are cosmetics.
- Burnett, C. L., et al. (2018). Safety assessment of hydrolyzed wheat protein and wheat gluten as used in cosmetics. International Journal of Toxicology, 37(1 Suppl), 55S–66S (safe when formulated to restrict peptides to an average molecular weight of 3,500 Da or less). https://doi.org/10.1177/1091581818776013
7. Pros
Claim: An effective, inexpensive hair protein when low-molecular-weight grades are used. |
Verification: Supported, with caveats. Safety is conditional on molecular weight.
Citations:
- Burnett, C. L., et al. (2018). Safety assessment of hydrolyzed wheat protein and wheat gluten as used in cosmetics. International Journal of Toxicology, 37(1 Suppl), 55S–66S (safe when formulated to restrict peptides to an average molecular weight of 3,500 Da or less). https://doi.org/10.1177/1091581818776013
- What it shows: Safety conclusion.
- Burnett, C. L., et al. (2018). Safety assessment of hydrolyzed wheat protein and wheat gluten as used in cosmetics. International Journal of Toxicology, 37(1 Suppl), 55S–66S (safe when formulated to restrict peptides to an average molecular weight of 3,500 Da or less). https://doi.org/10.1177/1091581818776013
8. Cons
Claim: Hydrolyzed wheat protein has a serious allergy history and is not gluten-free. |
Verification: Supported. We list these limits so you have the full picture:
- Allergy history. High-MW wheat protein in facial soap caused new wheat allergy and anaphylaxis.
- Contains wheat/gluten. Not for wheat-allergic or celiac customers.
- Grade-dependent. Certified low-MW only.
- Excluded from soap and facial cleansers.
- Better alternatives (oat, rice) for sensitive skin.
Citations:
- Fukutomi, Y., Itagaki, Y., Taniguchi, M., et al. (2011). Rhinoconjunctival sensitization to hydrolyzed wheat protein in facial soap can induce wheat-dependent exercise-induced anaphylaxis. Journal of Allergy and Clinical Immunology, 127(2), 531–533. https://pubmed.ncbi.nlm.nih.gov/?term=Rhinoconjunctival%20sensitization%20to%20hydrolyzed%20wheat%20protein%20in%20facial%20soap%20can%20induce%20wheat-dependent%20exercise-induced%20anaphylaxis
- What it shows: Allergy report.
- Chinuki, Y., & Morita, E. (2012). Wheat-dependent exercise-induced anaphylaxis sensitized with hydrolyzed wheat protein in soap. Allergology International, 61(4), 529–537. https://pubmed.ncbi.nlm.nih.gov/?term=Wheat-dependent%20exercise-induced%20anaphylaxis%20sensitized%20with%20hydrolyzed%20wheat%20protein%20in%20soap
- What it shows: Review.
- Laurière, M., Pecquet, C., Bouchez-Mahiout, I., et al. (2006). Hydrolysed wheat proteins present in cosmetics can induce immediate hypersensitivities. Contact Dermatitis, 54(5), 283–289. https://pubmed.ncbi.nlm.nih.gov/?term=Hydrolysed%20wheat%20proteins%20present%20in%20cosmetics%20can%20induce%20immediate%20hypersensitivities
- What it shows: Immediate reactions.
- Fukutomi, Y., Itagaki, Y., Taniguchi, M., et al. (2011). Rhinoconjunctival sensitization to hydrolyzed wheat protein in facial soap can induce wheat-dependent exercise-induced anaphylaxis. Journal of Allergy and Clinical Immunology, 127(2), 531–533. https://pubmed.ncbi.nlm.nih.gov/?term=Rhinoconjunctival%20sensitization%20to%20hydrolyzed%20wheat%20protein%20in%20facial%20soap%20can%20induce%20wheat-dependent%20exercise-induced%20anaphylaxis
9. Safety Notes
Claim: Patch test before use; for external use only. |
Verification: Supported. Follow these precautions:
- Patch test any new product on a small area for 24–48 hours before full use.
- Do not use if you are allergic to wheat or have celiac disease.
- Do not use on broken or inflamed skin or scalp.
- Stop use and seek medical care right away if you develop hives, swelling, or trouble breathing.
- Stop use if redness, burning, itching, or rash occurs, and talk to a healthcare provider.
- For external use only. Avoid the eyes unless the product is made for the eye area.
- If you are pregnant, nursing, have a medical condition, or are buying for a child, ask a healthcare provider before use.
Citations:
- Burnett, C. L., et al. (2018). Safety assessment of hydrolyzed wheat protein and wheat gluten as used in cosmetics. International Journal of Toxicology, 37(1 Suppl), 55S–66S (safe when formulated to restrict peptides to an average molecular weight of 3,500 Da or less). https://doi.org/10.1177/1091581818776013
- What it shows: Safety conditions.
- Chinuki, Y., & Morita, E. (2012). Wheat-dependent exercise-induced anaphylaxis sensitized with hydrolyzed wheat protein in soap. Allergology International, 61(4), 529–537. https://pubmed.ncbi.nlm.nih.gov/?term=Wheat-dependent%20exercise-induced%20anaphylaxis%20sensitized%20with%20hydrolyzed%20wheat%20protein%20in%20soap
- What it shows: Allergy cases.
- Burnett, C. L., et al. (2018). Safety assessment of hydrolyzed wheat protein and wheat gluten as used in cosmetics. International Journal of Toxicology, 37(1 Suppl), 55S–66S (safe when formulated to restrict peptides to an average molecular weight of 3,500 Da or less). https://doi.org/10.1177/1091581818776013
10. Product-line notes
- ORY® Skincare: Low-molecular-weight hydrolyzed wheat protein is used only in a few leave-on body and hand products, never in facial cleansers. Contains wheat. For external use only.
- ORY® Haircare: Designed for the look and feel of hair. Contains wheat. Not intended to treat scalp conditions or to promote hair growth or prevent hair loss.
- ORY® Handmade Soap: Hydrolyzed wheat protein is not used in any ORY® soap or cleansing bar.
- ORY® Cosmetics: Contains wheat where used. Do not share applicators, and replace any product that changes color, smell, or texture.
11. References
Peer-reviewed research
- Burnett, C. L., et al. (2018). Safety assessment of hydrolyzed wheat protein and wheat gluten as used in cosmetics. International Journal of Toxicology, 37(1 Suppl), 55S–66S (safe when formulated to restrict peptides to an average molecular weight of 3,500 Da or less). https://doi.org/10.1177/1091581818776013
- Chinuki, Y., & Morita, E. (2012). Wheat-dependent exercise-induced anaphylaxis sensitized with hydrolyzed wheat protein in soap. Allergology International, 61(4), 529–537. https://pubmed.ncbi.nlm.nih.gov/?term=Wheat-dependent%20exercise-induced%20anaphylaxis%20sensitized%20with%20hydrolyzed%20wheat%20protein%20in%20soap
- Fukutomi, Y., Itagaki, Y., Taniguchi, M., et al. (2011). Rhinoconjunctival sensitization to hydrolyzed wheat protein in facial soap can induce wheat-dependent exercise-induced anaphylaxis. Journal of Allergy and Clinical Immunology, 127(2), 531–533. https://pubmed.ncbi.nlm.nih.gov/?term=Rhinoconjunctival%20sensitization%20to%20hydrolyzed%20wheat%20protein%20in%20facial%20soap%20can%20induce%20wheat-dependent%20exercise-induced%20anaphylaxis
- Gavazzoni Dias, M. F. R. (2015). Hair cosmetics: An overview. International Journal of Trichology, 7(1), 2–15. https://pubmed.ncbi.nlm.nih.gov/25878443/
- Laurière, M., Pecquet, C., Bouchez-Mahiout, I., et al. (2006). Hydrolysed wheat proteins present in cosmetics can induce immediate hypersensitivities. Contact Dermatitis, 54(5), 283–289. https://pubmed.ncbi.nlm.nih.gov/?term=Hydrolysed%20wheat%20proteins%20present%20in%20cosmetics%20can%20induce%20immediate%20hypersensitivities
- Secchi, G. (2008). Role of protein in cosmetics. Clinics in Dermatology, 26(4), 321–325. https://pubmed.ncbi.nlm.nih.gov/18691510/
Government and regulatory sources
- U.S. Food and Drug Administration. 21 CFR 701.20 — Definition of “soap” (only true soap, made mainly of alkali salts of fatty acids and sold only as soap, is exempt from cosmetic rules). https://www.ecfr.gov/current/title-21/chapter-I/subchapter-G/part-701/subpart-B/section-701.20
