STRAINIA Care Straight Serum

From the Zen gardens of Japan to your morning routine — where ancient flow meets modern hair science.

STRAINIA | Japanese Haircare Engineering for Unruly Hair

• Built for くせ毛 (Kusege) — Frizzy, wavy, puffy and difficult-to-manage hair, addressed at the source
• Karesansui-Inspired Philosophy — The flowing curved lines of Japanese Zen dry gardens inspired STRAINIA’s approach: guiding hair from chaos, through tension, into order
• Specialist Development — Created by a team who personally experience unruly hair, in partnership with specialist Japanese manufacturing
• A Complete System — Part of a full Japanese straight-hair ritual: shampoo, treatment, mask, serum, milk, oil and tools
• Made in Japan 🇯🇵

Care Straight Serum — Moisture-Locked, Wave-Proof, Beautifully Straight

The Care Straight Serum was designed for one goal: keeping hair straight regardless of moisture in the air. Built around CMC-similar ingredients that reconstruct the internal moisture balance of each strand, it seals the cuticle from within so the softness and straightness you achieve stays — hour after hour. This is the serum for the hair type that has always fought back.

Key Ingredients

• CMC-Similar Ingredients — Mimic the function of Cell Membrane Complex to regulate internal moisture balance, glue the cuticle from within and lock straight hair in place; addresses the root cause of frizz and wave reversion
• Wool Keratin (Quaternium-33) — The same protein as hair itself; reinforces curly and damaged strands, delivering firmness, shine and lasting manageability
• Elcalacton (Y-Docosaracton) — Plant-derived ingredient that bonds to hair under heat; repairs damage while providing active protection against blow-dryer and curling iron heat during styling
• Phytosterols & Cholesterol — Restore and reinforce the hair’s natural lipid layer for smooth, conditioned texture
• Hydroxypropyltrimonium Hydrolyzed Keratin (Wool) — Cationic keratin that adheres to the hair surface to improve combability and reduce breakage

How to Use

Apply to towel-dried or dry hair, focusing on mid-lengths to ends. Distribute evenly and style as usual — blow-dry, straighten, or air-dry. No rinsing required. Use daily as part of the full STRAINIA ritual for cumulative straightening and moisture-control results.

Ingredients

Water, PG, Ethanol, Glycerin, Hydroxyethylcellulose, Hydroxypropyltrimonium Hydrolyzed Keratin (Wool), γ-Docosaracton, Phytosterols, Quaternium-33 (Wool), Cholesterol (Wool), Polyquaternium-7, Polyquaternium-10, (VP/VA) Copolymer, PPG-4 Ceteth-20, Citric Acid, Citric Acid Na, EDTA-2Na, Distearyl Dimonium Chloride, Behentrimonium Chloride, Propanediol, Methylparaben, Phenoxyethanol, Fragrance