KERATIN SHIELD HAIR MIST
A leave-in mist built on Hydrolyzed Keratin, a low-molecular-weight fraction of the structural protein of hair, which deposits a peptide film on the cuticle during wear to support the appearance of smoothing and a visible glossy finish. A Furcellaria Lumbricalis red algae polysaccharide adds a humectant film, composed for daily use across all hair types.
Backed by published research · references belowFormulated for daily leave-in styling and protective use across all hair types.
- Hydrolyzed Keratin, a low-molecular-weight peptide fraction of the structural protein of hair, deposits on the hair cuticle during the leave-in wear window and supports the appearance of cuticle smoothing.
- Furcellaria Lumbricalis (Red Algae) Extract, a sulphated polysaccharide from a marine alga, is listed by EU CosIng with a skin-conditioning function and contributes a humectant film on the hair cuticle.
- Leuconostoc/Radish Root Ferment Filtrate, a fermentation-derived skin-conditioning botanical, rounds out the leave-in composition.
Hero mechanism: Hydrolyzed Keratin, a hair-fibre protein, deposits a peptide film on the cuticle that supports the appearance of smoothing across the wear window. Full mechanism and citations under Details and references.
The Opuliss Skin Keratin Shield Hair Mist is a 100 ml / 3.38 fl oz leave-in styling and protective mist built on a three-active composition of Hydrolyzed Keratin, Furcellaria Lumbricalis (Red Algae) Extract, and Leuconostoc/Radish Root Ferment Filtrate, at 99% natural origin. It is not vegan eligible, as it contains Hydrolyzed Keratin derived from sheep wool. It is composed for daily leave-in styling and protective use across all hair types.
Hydrolyzed Keratin, Furcellaria Lumbricalis (Red Algae) Extract, Leuconostoc/Radish Root Ferment Filtrate.
Active ingredients: Hydrolyzed Keratin, a hair-fibre structural protein (cuticle-conditioning peptide film); Furcellaria Lumbricalis (Red Algae) Extract, a sulphated marine polysaccharide (humectant skin-conditioning film); Leuconostoc/Radish Root Ferment Filtrate, a fermentation-derived skin-conditioning botanical.
Aqua/Water, Butylene Glycol, Parfum/Fragrance, Sodium Levulinate, Hydrolyzed Keratin, Sodium Benzoate, Lactic Acid, Phenethyl Alcohol, Furcellaria Lumbricalis Extract, Leuconostoc/Radish Root Ferment Filtrate, Linalool, Limonene, Citrus Aurantium Peel Oil, Citrus Limon Peel Oil, Citronellol, Pelargonium Graveolens Flower Oil, Pinene
The ingredient list printed on your product’s packaging is always definitive; where it differs from this page, the packaging prevails.
Hold the bottle 15 to 20 centimetres from the hair and mist evenly across damp or dry hair, focusing on mid-lengths and ends. Style as desired. Suitable for daily use as a leave-in styling and protective mist.
Are there any side effects?
Not vegan eligible: it contains Hydrolyzed Keratin derived from sheep wool (ethically sourced and cruelty-free, but animal-derived). EU 26-allergen disclosure (above the 0.001% leave-on labelling threshold): Parfum, Linalool, Limonene, Citronellol, Pinene, plus Bitter Orange, Lemon, and Geranium essential oil constituents.
Does it actually work?
Hydrolyzed Keratin is a protein studied in cosmetics for forming a smoothing film on the hair's surface, helping this leave-in mist seal the cuticle for lasting shine and everyday protection.
How do I use it?
Hold the bottle 15 to 20 centimetres from the hair and mist evenly across damp or dry hair, focusing on mid-lengths and ends. Style as desired.
What is this and who is it for?
A leave-in mist built on Hydrolyzed Keratin, a low-molecular-weight fraction of the structural protein of hair, which deposits a peptide film on the cuticle during wear to support the appearance of smoothing and a visible glossy finish. A Furcellaria Lumbricalis red algae polysaccharide adds a humectant film, composed for daily use across all hair types.
99% natural origin. Not vegan eligible: it contains Hydrolyzed Keratin derived from sheep wool (ethically sourced and cruelty-free, but animal-derived). EU 26-allergen disclosure (above the 0.001% leave-on labelling threshold): Parfum, Linalool, Limonene, Citronellol, Pinene, plus Bitter Orange, Lemon, and Geranium essential oil constituents. Patch test recommended for first use. Avoid spraying directly into the eyes. Close eyes during application.
How to cite this product page: Opuliss. Keratin Shield Hair Mist. Opuliss Skin product page. 2026. https://opuliss.com/products/keratin-shine-leave-in-hair-mist
The Science
Cuticle shield zoneHydrolyzed Keratin is a protein studied in cosmetics for forming a smoothing film on the hair's surface, helping this leave-in mist seal the cuticle for lasting shine and everyday protection.
Source: Fan J, et al. Molecules, 2025 (PMID 40076404).
INSIDE THE SCIENCE
From precision-fermented actives to biomimetic complexes, discover what makes it Opuliss.
KERATIN
Reinforces and smooths the look of hair for strength and shine.
Source: Fan J, et al. Molecules, 2025 (PMID 40076404).
RED ALGAE
Baltic red algae that hydrates and helps calm sensitive skin.
Source: EU CosIng listed function.
LACTIC ACID
A gentle AHA that exfoliates to smooth texture and refine the look of tone.
Source: Smith WP. Journal of the American Academy of Dermatology, 1996 (PMID 8784274).
HOW TO USE
Hold the bottle 15 to 20 centimetres from the hair and mist evenly across damp or dry hair, focusing on mid-lengths and ends.
Style as desired.
Suitable for daily use as a leave-in styling and protective mist.
THE TEXTURE
The Opuliss difference
SCIENCE, MADE VISIBLE
Opuliss begins where the research ends. Every active is named, every claim is traceable, and nothing is left to promise alone.
Morning to night
A RITUAL, CONSIDERED
Each formula stands on its own and belongs to the whole. Layered with intention, morning and night, the routine becomes unmistakably yours.
A twenty four hour rhythm
THE SKIN KEEPS TIME
Skin is not the same at midnight as it is at nine in the morning. Across a single day its temperature, its acidity and the moisture it loses to the air each move on a rhythm of their own. Morning and night are not two routines. They are one, kept in time.
Yosipovitch G et al. Journal of Investigative Dermatology, 1998 (PMID 9424081). Sixteen volunteers sampled every two hours across a twenty four hour span.
