L'Oréal Professionnel Paris Keratin Alpha Sleek Shampoo — Sulfate-Free, Smooths & Hydrates

L'Oréal Professionnel Keratin Alpha Sleek Shampoo is a sulfate-free, ultra-creamy cleanser formulated with Keratin-Alpha Shaper and amino-acid chains to smooth, hydrate, and control frizz for long-lasting sleek hair.

This professional shampoo is designed to reshape and reinforce the hair’s keratin structure while delivering noticeable hydration, shine, and softness without harsh sulfates or alcohol. Its rich, creamy texture lifts dirt and buildup gently, while the Keratin-Alpha Shaper and amino-acid chains work to smooth the fiber to reduce frizz and tame unwanted volume. A delicate powdery-floral scent with cardamom and ginger top notes leaves hair smelling refined and fresh. Use as the first step in the Keratin Alpha Sleek routine for best results.

How does this shampoo smooth hair without harsh surfactants?

The formula avoids sulfated surfactants and relies on gentle cleansing agents that preserve the hair’s natural moisture. Keratin-Alpha Shaper and amino-acid chains sit on and inside the fiber to reorganize the keratin network for a sleeker surface and reduced friction.

• Ultra-creamy texture that cleanses without stripping natural oils
• Sulfate-free surfactant system for softer, less porous hair
• Keratin-Alpha Shaper + amino-acid chains to smooth the cuticle

What measurable improvements can I expect after using it?

Instrumental tests show the shampoo increases hydration and shine when used alone, and delivers longer-lasting smoothness as part of the full Keratin Alpha Sleek routine. You can expect softer, more manageable hair with visible radiance and reduced frizz.

• Up to 50% more hydration from shampoo use alone (instrumental test)
• Up to 76% more shine measured after shampoo use
• Improved frizz and volume control when paired with the Smooth Transformer and Serum

Will this shampoo work on chemically treated or heat-styled hair?

The gentle, reinforcing formula is compatible with colored and chemically treated hair because it cleanses without stripping and helps rebuild keratin structure. It supports heat-styled looks by smoothing the fiber, but avoid making medical or restorative claims — results depend on hair condition and styling habits.

• Safe for use on color-treated hair; free of sulfated detergents and alcohol
• Helps maintain smooth styles by reducing frizz and flyaways
• Best results when combined with the rest of the Keratin Alpha Sleek range

How does the fragrance and texture change the at-home experience?

The shampoo’s luxurious, creamy lather makes application pleasant and easy to distribute, while the scent adds a refined finishing note. Top notes of cardamom and ginger lead into orris, sandalwood, and musk for a balanced, powdery-floral aroma that lingers subtly on hair.

• Rich, indulgent lather for easy coverage and thorough cleansing
• Fresh powdery-floral fragrance with spicy top notes
• No artificial colorants, creating a clean sensory profile

Who is this for: This shampoo is ideal for people seeking salon-grade smoothing and frizz control without harsh sulfates — especially those with unruly, dry, frizz-prone, color-treated, or heat-styled hair. If you want a gentle cleanser that adds hydration, shine, and a sleeker hair surface as part of a targeted keratin routine, Keratin Alpha Sleek Shampoo from L'Oréal Professionnel Paris is suited to your at-home regimen. For extended smoothing effects combine it with the Smooth Transformer and Serum from the same collection.

Ingredients

AQUA / WATER / EAU • SODIUM COCOYL ISETHIONATE • DISODIUM LAURETH SULFOSUCCINATE • GLYCOL DISTEARATE • SODIUM LAURYL SULFOACETATE • SODIUM LAUROYL SARCOSINATE • GLYCERIN • PARFUM / FRAGRANCE • DECYL GLUCOSIDE • COCAMIDOPROPYL BETAINE • COCO-BETAINE • PPG-5-CETETH-20 • DIVINYLDIMETHICONE/DIMETHICONE COPOLYMER • AMODIMETHICONE • SODIUM HYDROXIDE • CITRIC ACID • POLYQUATERNIUM-7 • CARBOMER • POLYQUATERNIUM-10 • SODIUM BENZOATE • SODIUM CHLORIDE • PEG-55 PROPYLENE GLYCOL OLEATE • PROPYLENE GLYCOL • SALICYLIC ACID • BENZOIC ACID • TETRAMETHYL ACETYLOCTAHYDRONAPHTHALENES • POLYSORBATE 21 • LINALYL ACETATE • CARVONE • CITRUS LIMON PEEL OIL • TRIDECETH-6 • LIMONENE • COUMARIN • LINALOOL • CITRUS AURANTIUM BERGAMIA PEEL OIL • BUTYLENE GLYCOL • C12-13 ALKETH-23 • C12-13 ALKETH-3 • PINENE • CETRIMONIUM CHLORIDE • JUNIPERUS VIRGINIANA OIL • PHENOXYETHANOL • SODIUM LACTATE • TAURINE • POLYSORBATE 20 • PALMITOYL TRIPEPTIDE-1 • PALMITOYL TETRAPEPTIDE-7