NK 4-Step Keratin Hair Treatment Set – Formaldehyde-Free Vegan Straightening System with Collagen, Keratin, Silk Protein & Niacinamide – Includes Shampoo & Repair Mask – All Hair Types (8oz)

Transform your hair at home with the NK Professional Care 4-Step Keratin Hair Treatment System – a professional-grade, vegan formula designed to deliver intense straightening, deep hydration, and long-lasting shine.

Perfect for sensitive, colored, and chemically treated hair, this formaldehyde-free system strengthens, smooths, and nourishes from root to tip.

✅ STEP 1: Deep Cleansing Anti-Residue Shampoo

Prepares the hair by removing buildup and opening the cuticle for optimal treatment absorption. Ideal for professional-level pre-treatment.

✅ STEP 2: Ultra-Deep Keratin Smoothing Treatment

Infused with Collagen, Hydrolyzed Keratin, and Avocado Extract, this formula straightens hair in just 20 minutes, repairing damage while reducing frizz and boosting shine. Results last up to 6 months.

✅ STEP 3: Maintenance Shampoo (Sodium-Free)

A gentle, color-safe formula enriched with Silk Protein, Milk Protein, and Betaine. Helps maintain the straightening effect while nourishing and softening the hair. Suitable for daily use.

✅ STEP 4: Restorative Hair Mask

With Niacinamide, Panthenol, Vitamin C (Ascorbic Acid), and Biotin, this intensive mask improves texture, promotes growth, strengthens strands, and leaves hair silky smooth with a delicate scent — all in just 5 minutes.

Results you’ll love:

✔️ Frizz-free, sleek hair

✔️ Enhanced shine and softness

✔️ Stronger, more manageable strands

✔️ Long-lasting straightening (up to 6 months)

✔️ Safe, nourishing care for sensitive or treated hair