If you’ve had a keratin treatment, you already know how game-changing it is; sleek, frizz-free, glossy hair that feels salon-fresh for weeks.

But here’s the catch: using the wrong shampoo can undo all that magic in just a few washes.

That’s where sulfate-free shampoos come in. They’re gentler, preserve your keratin treatment, and keep your hair hydrated instead of stripping away its natural oils.

The right formula can mean the difference between long-lasting smoothness and dull, frizzy hair that’s back to square one.

I’ve rounded up some of the best sulfate-free shampoos that are safe for keratin-treated hair, products that actually live up to their promises.

Each of these has been tried, tested, and chosen for how well they cleanse without compromise, leaving your hair looking smooth, soft, and vibrant week after week.

 

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What sulfate-free shampoo should I use for my Keratin-treated hair?

For keratin-treated hair, opt for the Keratin Complex Color Care Shampoo. It's sulfate-free, which means it gently cleanses without stripping away the keratin treatment or hair color, helping to maintain your hair's smoothness and shine. This shampoo is formulated to extend the life of your keratin treatment and is enriched with keratin, soy, and wheat proteins to strengthen and protect the hair, ensuring your locks remain sleek and manageable.

 

Best Sulfate Free Shampoo For Keratin Treated Hair 2025

Product (Sulfate-free, keratin-friendly)	Product Link
Keratin Complex Color Care Shampoo (gentle, keratin & color-safe)	Buy Now
Davines NOUNOU Shampoo, Hydrating Deep Shampoo (deep hydration, gentle coconut-derived cleanser)	Buy Now
Bellisso Keratin Enriched Shampoo (keratin boost, paraben & sulfate free)	Buy Now
Luseta Keratin Shampoo (keratin proteins, color-safe, creamy lather)	Buy Now
Damila Salt & Sulfate Free Shampoo (nourishing formula with Moroccanoil & neem)	Buy Now
OGX Ever Straightening + Brazilian Keratin Therapy Smoothing Shampoo (argan oil, acai extract, drugstore favorite)	Buy Now

 

 

Davines NOUNOU Shampoo, Hydrating Deep Shampoo

After using this shampoo I noticed that my hair had a softer feel, was more manageable, looked as if it had more volume, and had a wonderful subtle shine to it.

It is shampoo that claims to be specifically designed for keratin-treated hair. It’s made up of a mild coconut-oil derived cleanser that is extremely gentle, yet still delivers a powerful and refreshing cleanse.

This shampoo is extremely gentle on the hair and scalp, and lathers easily without any kind of stripping feeling one sometimes gets when using normal sulfate-based shampoos. The deep hydrating formula helps to restore moisture-balance to the hair and scalp, minimizing any possible damage from coloring, heat-styling, or chemicals.

In addition to being gentle on keratin-treated hair, it contains additional natural ingredients, including olive oil to help improve moisture and reduce frizz, avocado oil to provide vitamins and minerals, sweet almond oil for its superior antioxidants, and sunflower oil for its ability to prevent hair loss.

Not only is it a gentle and effective cleaning formula, it is also packed with natural oils and vitamins that help to repair and protect the hair and scalp.

Pros:

• The salt-free formula is good for chemically processed hair
• Contains natural oils that prevent frizz
• It is sulfate-free so good for colored hair

Cons:

• None

My Ratings:

• Cleansing Ability - 4/5
• Moisturizing Ability - 4.5/5
• Gentleness - 4.5/5

 

 

 

Bellisso Keratin Enriched Shampoo

Bellisso’s Keratin Enriched Shampoo is the ideal choice for anyone who’s craving a sulfate-free, salon-grade cleanse but with the added bonus of a keratin boost. As a bonus, it’s free from parabens and sulfates, making it even better for your hair.

The keratin enriched formula at the heart of this shampoo can transform even the most damaged hair in just a few washes. Packed with nourishing ingredients like coconut oil, argan oil and sunflower seed oil, the shampoo repairs each strand to leave hair feeling healthy.

When used correctly, the best part of this shampoo has to be the indulgent lather.

I use it almost daily and it makes my hair instantly silky, cleansing the scalp and restoring strength. From the moment you begin to lather, your hair is in complete relaxation mode, allowing you to enjoy a gentle massage and lightly fragrant aroma.

It doesn’t matter if you have straight hair, curly hair, coloured hair - this shampoo will leave your hair feeling smooth, bouncy and fabulous. Plus, you can use it as little or as often as you need to.

For the price, it’s definitely worth giving this shampoo a try. Not only does it perform well, but it has the added benefit of being kind to colour-treated, keratin-treated and chemically-treated hair. Plus, the value for money is great, there’s enough product in a single bottle to last for weeks.

Pros:

• Affordable price
• Lathers well despite being sulfate free
• Contains coconut oil that moisturizes hair

Cons:

• The shampoo gets too heavy for fine hair

My Ratings:

• Cleansing Ability - 4.5/5
• Moisturizing Ability - 4/5
• Gentleness - 4.5/5

 

 

 

Luseta Keratin Shampoo

This shampoo comes enriched with keratin proteins, which repair and strengthen the keratin structure in your hair — perfect for keratin-treated hair.

The Luseta Keratin Shampoo has a thick, creamy texture and a pleasant, subtle smell. It lathers very nicely and rinses out easily, leaving hair feeling soft and clean. It’s a color-safe shampoo that won’t fade dyed hair.

I applied the shampoo to wet hair and massaged it in. After a few minutes, it foamed up nicely and felt really nice on my scalp. Once dry, my hair looked and felt much healthier, softer, smoother, and more manageable.

The keratin components in the shampoo help to repair and restore the protein structure of your hair. It doesn’t contain harsh sulfates, so it won’t strip nutrients, and it’s enriched with natural ingredients that nourish and protect. It’s also gentle for sensitive scalps. Highly recommended.

Pros:

• Repairs and undoes damage from keratin process
• Little product goes a long way
• It is sulfate-free so good for colored hair

Cons:

• Expensive

My Ratings:

• Cleansing Ability - 4/5
• Moisturizing Ability - 4.5/5
• Gentleness - 4.5/5

 

 

 

Damila Salt & Sulfate Free Shampoo

The Damila Salt & Sulfate Free Shampoo does a tremendous job of protecting and nourishing keratin-treated hair, leaving it feeling soft and light.

Although it’s an economic solution, the ingredients in its formula far outweigh the cost. It provides an excellent balance of beneficial ingredients that nourish and protect hair while making styling easier.

This sulfate-free gem contains Moroccanoil, buxus chinensis, sunflower seed oil, and neem, which help to nourish and repair your hair. It maintains the softness and elasticity that come with keratin treatments.

After extensive use, my hair looks and feels healthier and softer with every application. In terms of performance, the Damila Salt & Sulfate Free Shampoo is your best bet if you’re looking for a shampoo that both nourishes and protects your hair while maintaining its keratin sheen.

My Ratings:

• Cleansing Ability - 4.5/5
• Moisturizing Ability - 4.5/5
• Gentleness - 4.5/5

 

 

 

OGX Ever Straightening + Brazilian Keratin Therapy Smoothing Shampoo

The OGX Brazilian Keratin Therapy Smoothing Shampoo feels luxurious, with an amazing scent and rich lather. The formula isn’t too thick or thin, washes out completely, and leaves no residue.

It keeps the benefits of keratin therapy intact and prevents dryness. After just one wash, my hair felt silky and smooth, staying sleek without being greasy.

It contains argan oil to hydrate and add shine, and acai berry extract to protect the keratin. The shampoo is sulfate-free and won’t strip natural oils or color.

Overall, it’s a great choice for anyone looking for a drugstore sulfate-free shampoo that keeps keratin-treated hair looking and feeling great. The luxurious lather and moisture-rich formula leave hair sleek and soft for days.

My Ratings:

• Cleansing Ability - 4/5
• Moisturizing Ability - 4.5/5
• Gentleness - 4.5/5

 

 

 

Conclusion

When it comes to maintaining keratin-treated hair, the shampoo you pick isn’t just another step in your routine, it’s the foundation of how your hair behaves, feels, and shines.

Whether you go for salon-grade formulas like Keratin Complex or affordable gems like OGX Brazilian Keratin Therapy, the key is to avoid harsh sulfates and salts that can undo your treatment.

These shampoos keep your strands nourished, manageable, and glossy, helping your keratin treatment last longer while keeping your hair healthy from root to tip.

So, if you’ve invested in smoother, shinier hair, protect it with a shampoo that works as hard as your stylist did. Trust me, your hair will thank you every time you wash it.

 

 

 

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