What Is Hydrolyzed Sisymbrium Irio Seedcake?
Hydrolyzed Sisymbrium Irio Seedcake is a plant-derived ingredient made by breaking down the leftover seedcake of Sisymbrium irio, a member of the mustard family better known as London rocket. After the oil is pressed from the seeds, the remaining cake is treated with water, acids or enzymes to “hydrolyze” its proteins and other large molecules into smaller, skin-friendly fragments. The result is a water-soluble mix of amino acids, peptides and carbohydrates that can be easily blended into modern skin care.
Early interest in Sisymbrium irio came from its traditional use as animal feed and a soil-improving crop. Cosmetic chemists later noticed that the seedcake, once hydrolyzed, produced a lightweight film that helped shield skin from moisture loss. As a result, the ingredient started appearing in niche moisturizers and has since been adopted by larger brands looking for plant-based alternatives to synthetic protective agents.
You are most likely to find Hydrolyzed Sisymbrium Irio Seedcake in leave-on products that aim to support the skin barrier. Typical formulas include daily face and body lotions, hydrating serums, masks, after-sun gels and gentle baby creams. Because it is water-soluble it slots easily into both lightweight gels and richer emulsions.
Hydrolyzed Sisymbrium Irio Seedcake’s Cosmetic Benefits/Uses
In skin care this ingredient is valued for one core job
Skin protecting: The hydrolyzed proteins form an invisible, breathable layer that helps reduce transepidermal water loss, keeping skin hydrated for longer. This soft film also acts as a mild shield against everyday pollutants and irritants, making formulas feel comforting on sensitive or freshly exfoliated skin.
Who Can Use Hydrolyzed Sisymbrium Irio Seedcake
This plant based film former tends to suit most skin types. Dry or sensitized complexions benefit from its moisture locking shield while oily and combination skin appreciate that it is lightweight and non greasy. No specific concerns make it unsuitable for acne prone or mature skin.
Because it is fully plant derived and processed without animal by products it is acceptable for both vegans and vegetarians.
Current data shows no issues for women who are pregnant or breastfeeding when the ingredient is used in topical cosmetics; still this is not medical advice and anyone who is expecting or nursing should run all skincare choices past a qualified doctor just to be safe.
The ingredient does not increase photosensitivity so you can use it morning or night without heightened sun risk. It pairs well with most actives and preservatives commonly found in modern formulas.
Potential Side Effects/Adverse Reactions
Reactions to topical Hydrolyzed Sisymbrium Irio Seedcake vary from person to person. The following are potential side effects however they remain uncommon when the ingredient is properly formulated in a finished product.
- Mild redness or itching in individuals sensitive to mustard family plants
- Transient stinging if applied to freshly shaved or compromised skin
- Rare cases of contact dermatitis due to individual allergy to seed proteins
- Formula spoilage related irritation if the product is old or improperly stored
If any adverse reaction occurs stop use immediately and seek advice from a healthcare professional.
Comedogenic Rating
Rating: 0–1 (practically non-comedogenic)
Hydrolyzed Sisymbrium Irio Seedcake is water soluble and contains mainly small peptides, amino acids and carbohydrates rather than heavy oils or waxes that can block pores. The ultra-light film it leaves on skin is breathable and easily rinsed away, giving it a very low likelihood of clogging follicles. This makes it suitable for people who are prone to acne or frequent breakouts.
As with most hydrolysates, formula context matters: pairings with rich butters or occlusive silicones could raise a finished product’s overall comedogenicity even though the seedcake extract itself stays low.
Summary
Hydrolyzed Sisymbrium Irio Seedcake serves mainly as a skin-protecting agent. Once applied its broken-down proteins form a light, invisible shield that slows water loss and buffers skin against everyday pollutants, leaving the surface feeling hydrated and comfortable.
While not yet a household name it is quietly gaining traction among brands looking for clean, plant-based alternatives to synthetic film formers. Its gentle nature, vegan origin and compatibility with most actives make it easy to slot into modern formulas aimed at sensitive or barrier-compromised skin.
Current safety data shows a very low risk of irritation or allergy and no evidence of systemic concerns. Still, skin is individual so it is wise to patch test any new product that features this or any other novel ingredient before full-face use.