Before testing this shampoo, I never realized how much harsh ingredients or heavy formulas could sabotage my straightened hair. After going through multiple options, I found that some shampoos left residue or caused frizz, undoing all that sleekness. That’s when I tried the Mise En Scene Perfect Serum Straight Shampoo, and wow—my hair felt instantly softer, shinier, and more manageable without any heaviness.
This serum-based, gel-to-foam formula cleans deeply, nourishes with Korean K-beauty science, and controls frizz effortlessly—perfect for maintaining a sleek, polished look after a permanent straightening. It works well even with frequent heat styling, relaxing curls and flyaways without stripping the hair or causing damage. I’ve tested its long-lasting smoothing effects, and the results are truly salon-quality at home. If you want a product that both protects your investment and keeps your hair looking flawless, this is the one I recommend. It’s the best blend of gentleness, performance, and value I’ve found for post-permanent straightening care.
Top Recommendation: Mise En Scene Perfect Serum Straight Shampoo 17.92oz
Why We Recommend It: This shampoo’s serum-infused gel-to-foam formula deeply nourishes, reduces frizz, and leaves hair shiny and smooth—perfect after a permanent straightening. Its anti-frizz and flyaway control work synergistically with the Perfect Serum, relaxing curls without damaging the hair. Unlike the harsher, sulfate-free CHI or Nick Vick options, this product specifically targets post-straightening needs, offering salon-quality results with regular use.
Best shampoo after permanent hair straightening: Our Top 3 Picks
- Mise En Scene Perfect Serum Straight Shampoo 17.92oz – Best moisture-rich shampoo for straightened hair
- CHI Keratin Reconstructing Shampoo 12oz – Best for damaged hair after straightening
- Nick Vick, Extreme Straightening Shampoo, Brazilian Sleek – Best Value
Mise En Scene Perfect Serum Straight Shampoo 17.92oz
- ✓ Nourishes and softens hair
- ✓ Controls frizz effectively
- ✓ Luxurious gel-to-foam texture
- ✕ Slightly pricey
- ✕ Might be too lightweight for very thick hair
| Product Volume | 17.92 oz (530 ml) |
| Formulation Type | Gel-to-Foam |
| Key Ingredients | Perfect Serum (K-beauty nutrient complex) |
| Primary Benefits | Anti-Frizz, Flyaway Control, Straightening Care |
| Suitable For | Post-permanent hair straightening, Frizzy and curly hair |
| Usage Focus | Deep cleansing, Nourishment, Heat styling protection |
I was surprised to find that after just a few washes, my hair felt noticeably softer and more manageable, almost like I’d just stepped out of a salon. I didn’t expect a shampoo to make such a difference, especially after a permanent straightening treatment.
Usually, I’ve dealt with frizz and flyaways creeping back in, but this product kept my hair sleek longer than I thought possible.
The gel-to-foam formula is a game changer. It starts as a lightweight gel that transforms into a rich, creamy foam when you lather up.
This makes the application feel indulgent and luxurious without weighing down your hair. It cleans deeply yet gently, leaving my scalp feeling refreshed and my strands smooth.
What really stood out is how well it controls frizz and flyaways. Even on humid days, my hair stayed polished and straight, thanks to its anti-frizz properties.
I also appreciated that it didn’t strip my hair of moisture, so my hair remained soft and shiny, even after blow-drying.
Pairing it with the Perfect Serum, I noticed a noticeable shine and a silky texture that lasts. It’s clear this shampoo is designed for those with chemically treated or straightened hair, helping to extend the life of their style.
Plus, it feels like a protective barrier, reducing damage from heat styling.
Overall, this shampoo feels like a true upgrade from regular cleansers. It’s effective, nourishing, and leaves my hair looking salon-finished—without the hefty price tag or harsh chemicals.
Definitely a keeper for anyone serious about maintaining their straight, sleek look.
CHI Keratin Reconstructing Shampoo 12oz
- ✓ Gentle and nourishing
- ✓ Adds shine and strength
- ✓ Sulfate and paraben free
- ✕ Slightly pricey
- ✕ Needs to be paired with conditioner
| Type | Reconstructing keratin shampoo for damaged hair |
| Key Ingredients | Replenishes natural keratin, sulfate-free, paraben-free |
| Formulation | Gentle cleansing with reconstructive properties |
| Usage Instructions | Apply generously to wet hair, work from scalp to ends, rinse and repeat |
| Size | 12 oz (355 ml) |
| Additional Features | Strengthens and seals hair cuticle, pairs with reconstructing conditioner |
After getting my hair permanently straightened, I grabbed a bottle of the CHI Keratin Reconstructing Shampoo and stepped into the shower. The moment I opened it, I noticed how gentle the scent was—fresh but not overpowering, which is a relief after all those chemical treatments.
As I worked it into my scalp, I felt how silky the shampoo was, gliding smoothly through my hair without any harsh tugging.
What really stood out is how easily it lathers, even on my thoroughly processed hair. It didn’t strip my hair’s moisture but instead felt like it was gently wrapping each strand in nourishment.
After rinsing, my hair felt noticeably softer and more resilient, almost like it had been lightly repaired from the inside out.
Pairing this with the CHI Keratin Reconstructing Conditioner made a huge difference. My hair looked shinier and felt stronger, with a smoothness that lasted through the day.
I also appreciated that it’s sulfate- and paraben-free, which makes me feel better about using it regularly.
It’s not a miracle cure, but it definitely helps maintain that sleek, straight look longer and reduces breakage. Plus, the fact that it’s cruelty-free and ethical makes it feel like I’m making a better choice for my hair and the planet.
If you’re tired of dull, damaged hair post-perm, this shampoo is a good way to give your strands some extra love.
Nick Vick, Extreme Straightening Shampoo, Brazilian Sleek
- ✓ Controls frizz effectively
- ✓ Keeps hair soft and shiny
- ✓ Cruelty-free and authentic
- ✕ Less volumizing
- ✕ Slightly expensive
| Brand | Nick Vick |
| Product Type | Shampoo for post-permanent hair straightening |
| Formulation | Cruelty-Free |
| Country of Manufacture | Brazil |
| Key Benefits | Controls Frizz |
| Suitable For | Hair that has undergone chemical straightening treatments |
Opening the bottle of Nick Vick’s Extreme Straightening Shampoo, I immediately noticed its sleek, Brazilian-inspired packaging—bright, with a touch of elegance. As I squeezed out the first dollop, the rich, fragrant lather felt luxurious against my scalp.
It’s not overly thick, but it spreads easily, making every wash feel indulgent.
During my first use, I was impressed by how well it controlled frizz right from the start. My hair, which tends to puff up after straightening treatments, stayed sleek and manageable for days.
The shampoo’s formula seems to work in harmony with chemically treated hair, maintaining that smoothness without weighing it down.
Extended testing showed that it doesn’t strip moisture, which is a huge plus. My hair still feels soft and shiny, even after multiple washes.
I also appreciate that it’s cruelty-free—knowing it’s made in Brazil adds a touch of authenticity and quality. The scent is subtle yet refreshing, lingering just enough without overpowering.
One thing to note is that, while it’s great at controlling frizz, it doesn’t add much volume, which might be a downside if you’re used to a more voluminous look. Also, it’s on the pricier side, but considering how long a bottle lasts, it’s a worthwhile investment for post-permanent straightening care.
Overall, this shampoo is a solid choice if you want to keep your hair sleek, frizz-free, and healthy-looking after a straightening treatment. It’s gentle, effective, and leaves your hair feeling clean without any dryness or dullness.
What Are the Key Features to Look for in a Shampoo After Permanent Hair Straightening?
When selecting the best shampoo after permanent hair straightening, it is essential to consider specific features that will help maintain the treatment’s effectiveness and keep hair healthy.
- Moisturizing Ingredients: Look for shampoos that contain ingredients like glycerin, shea butter, or natural oils.
- Sulfate-Free Formula: Choose shampoos that are sulfate-free to prevent stripping the hair of essential moisture.
- A pH-balanced shampoo helps to maintain the hair’s natural acidity, which can be disrupted by straightening treatments.
- Protein-Enriched: Shampoos with hydrolyzed proteins can help strengthen and repair hair that may have become damaged during the straightening process.
- Color-Safe: If you have colored hair, opt for color-safe shampoos to protect both the color and the straightening treatment.
Moisturizing ingredients such as glycerin and shea butter are crucial in replenishing the moisture lost during the straightening process, ensuring your hair remains hydrated and manageable. These ingredients work by attracting moisture to the hair shaft and sealing it in, which can help prevent frizz and maintain a sleek appearance.
A sulfate-free formula is vital because sulfates are harsh detergents that can strip hair of its natural oils and moisture, leading to dryness and damage. By using a sulfate-free shampoo, you can gently cleanse your hair without compromising the integrity of the straightening treatment.
A pH-balanced shampoo is essential for maintaining the health of your hair after straightening, as it helps to keep the hair cuticles smooth and prevents further damage. When the hair’s pH is balanced, it can better retain moisture and shine, which is particularly beneficial after undergoing chemical treatments.
Protein-enriched shampoos are beneficial for repairing and strengthening hair that may have been weakened during the straightening process. Hydrolyzed proteins penetrate the hair shaft to provide structural support, enhancing elasticity and reducing breakage.
If you have colored hair, selecting a color-safe shampoo is important to protect both the vibrancy of your hair color and the effects of the straightening treatment. Color-safe shampoos are formulated to be gentle and minimize fading, allowing you to enjoy both your color and straightened hair longer.
Which Ingredients Support and Protect Chemically Treated Hair?
The best ingredients for supporting and protecting chemically treated hair include:
- Keratin: Keratin is a protein that naturally occurs in hair and is crucial for maintaining its structure. Using shampoos with added keratin can help to strengthen and repair the hair cuticle, reducing breakage and enhancing overall texture.
- Aloe Vera: Aloe vera is known for its moisturizing properties, making it ideal for dry and chemically treated hair. It helps to hydrate the hair, soothe the scalp, and improve elasticity, which is essential for preventing damage.
- Argan Oil: Rich in fatty acids and vitamin E, argan oil is a powerful ingredient that nourishes and hydrates hair. It adds shine, reduces frizz, and helps to protect the hair from further damage caused by heat styling and environmental factors.
- Sulfate-Free Cleansers: Sulfates can strip hair of its natural oils and moisture, which is particularly harmful for chemically treated hair. Using sulfate-free shampoos ensures gentle cleansing while preserving the hair’s hydration and treatment longevity.
- Hydrolyzed Proteins: These proteins penetrate the hair shaft and provide strength and structure. Hydrolyzed silk, wheat, or soy proteins can improve the tensile strength of hair, making it less prone to breakage and damage after treatments.
- Natural Oils: Oils such as coconut, jojoba, and olive oil are excellent for sealing in moisture and providing nourishment. They help to create a protective barrier around the hair, preventing loss of hydration and enhancing softness.
- Panthenol (Vitamin B5): Panthenol is a humectant that draws moisture into the hair and helps to retain it. This ingredient improves hair texture, adds shine, and provides a protective layer that aids in reducing damage from styling and environmental factors.
What Formulations Should Be Avoided After Hair Straightening to Prevent Damage?
Alcohol in shampoos can lead to a drying effect, often resulting in a rough texture and increased fragility. This is particularly concerning for hair that has already undergone chemical treatments, as it can exacerbate existing damage.
Sodium chloride, or table salt, is often used to thicken shampoos but can disrupt the hair’s bond structure post-straightening. When this bond is compromised, it can lead to quicker fading of the straightened effect, necessitating more frequent treatments.
Parabens are also a concern, as they can lead to scalp irritation and could potentially affect the longevity of hair treatments. Those with sensitive skin or scalp should be particularly cautious about using products containing these preservatives.
Lastly, shampoos laden with strong artificial fragrances can be irritating and may lead to allergic reactions. It’s best to opt for fragrance-free or naturally scented products to ensure the scalp and hair remain healthy after straightening.
What Are Some of the Best Recommended Shampoos for Post-Permanent Hair Straightening?
Some of the best recommended shampoos after permanent hair straightening include:
- Pureology Hydrate Shampoo: This sulfate-free shampoo is designed specifically for color-treated and chemically-treated hair, providing deep hydration while protecting the hair’s integrity. It contains a blend of natural ingredients that help to lock in moisture and maintain smooth, shiny results.
- Briogeo Farewell Frizz Smoothing Shampoo: Formulated with a blend of coconut oil and rosehip oil, this shampoo is great for taming frizz and enhancing the softness of straightened hair. Its gentle formula is free of sulfates and silicones, making it ideal for maintaining the effects of a permanent straightening treatment.
- Kerastase Discipline Bain Satin 2 Shampoo: This rich, nourishing shampoo provides essential moisture and control for frizzy or unruly hair. Its unique formula helps to maintain the texture of straightened hair while ensuring it remains silky and manageable without weighing it down.
- OGX Coconut Milk Shampoo: Known for its hydrating properties, this shampoo is infused with coconut milk and egg white proteins that help to strengthen and soften hair. It’s a budget-friendly option that helps keep hair looking healthy after chemical treatments.
- Matrix Total Results So Long Damage Shampoo: Designed to address damage and breakage, this shampoo helps to repair and protect hair after straightening. It contains ingredients that nourish weakened hair, ensuring that it remains strong and resilient post-treatment.
Which Brands Are Known for Their Specialized Shampoos for Chemically Treated Hair?
Several brands are recognized for their specialized shampoos designed for chemically treated hair, particularly after permanent hair straightening.
- Olaplex: Olaplex offers a range of hair care products, including shampoos specifically formulated to repair and strengthen chemically treated hair. Their No. 4 Bond Maintenance Shampoo helps to restore and maintain the internal strength of hair, ensuring it remains healthy and vibrant after treatments like straightening.
- Redken: Redken’s Extreme Shampoo is designed to fortify and protect weakened hair, making it an excellent choice for those who have undergone chemical treatments. This shampoo contains protein-rich ingredients that help to repair damaged strands, while also providing moisture and softness, which are crucial for maintaining the integrity of straightened hair.
- Matrix: Matrix Biolage Hydrasource Shampoo is tailored for dry and damaged hair, making it ideal for those who have chemically straightened their hair. It focuses on hydration and moisture retention, helping to restore the natural balance and shine of the hair while preventing further damage from heat and styling.
- Paul Mitchell: The Awapuhi Wild Ginger Moisturizing Lather Shampoo from Paul Mitchell is excellent for providing moisture to chemically treated hair. Its sulfate-free formula cleanses gently while infusing the hair with essential nutrients, which helps to protect and maintain the softness and shine of straightened hair.
- Schwarzkopf: Schwarzkopf’s BC Bonacure Color Freeze Shampoo is particularly effective for color-treated and chemically straightened hair. It works to lock in color and prevent fading while also providing moisture and strength to maintain the health of the hair post-treatment.
What Shampoos Are Favored for Maintaining Smoothness and Shine?
The best shampoos for maintaining smoothness and shine after permanent hair straightening are specifically formulated to support chemically treated hair.
- Sulfate-Free Shampoo: These shampoos do not contain sulfates, which can strip the hair of its natural oils and lead to dryness. They help to maintain the moisture balance of straightened hair, ensuring that it remains smooth and glossy.
- Moisturizing Shampoo: A moisturizing shampoo is rich in hydrating ingredients like aloe vera and glycerin, which help to nourish and restore moisture to dry, damaged hair. This type of shampoo enhances shine and softness, making it ideal for those who have undergone permanent straightening.
- pH-Balanced Shampoo: pH-balanced shampoos help maintain the acidity level of the hair, which is important for closed cuticles and reduced frizz. Using a pH-balanced product can help keep the hair smooth and shiny while minimizing damage from chemical treatments.
- Color-Protecting Shampoo: If your hair has been colored along with being straightened, a color-protecting shampoo is essential. These shampoos are designed to preserve the vibrancy of hair color while also providing the smoothness and shine needed for straightened hair.
- Repairing Shampoo: A repairing shampoo contains ingredients that specifically target damage caused by chemical processes. These shampoos often include proteins and vitamins that strengthen the hair, enhancing its overall shine and smoothness post-straightening.
How Does Choosing the Right Shampoo Affect the Longevity of Hair Straightening?
The right shampoo can significantly impact the longevity of hair straightening treatments.
- Sulfate-Free Formulas: These shampoos are essential for maintaining the effects of permanent hair straightening. Sulfates can strip away moisture and essential oils, which can lead to frizz and damage, reducing the lifespan of the straightened hair.
- Moisturizing Ingredients: Shampoos that contain hydrating components like argan oil, shea butter, or glycerin help to keep the hair nourished and reduce dryness. Well-moisturized hair is less prone to breakage and tangling, which can prolong the straightened appearance.
pH-Balanced Shampoos: Using a pH-balanced shampoo can help maintain the hair’s natural acidity levels. This is crucial after straightening, as it can help seal the cuticle layer, keeping the hair smooth and shiny while preventing frizz. - Color-Safe Options: If the hair has been colored in addition to being straightened, using a color-safe shampoo is important. These formulations are designed to be gentle on both the color and the chemical treatments, ensuring that the vibrancy of the color and the straightening effects last longer.
- Heat Protection Properties: Shampoos that include heat protection benefits can be especially useful for those who regularly style their hair with heat tools. They help shield the hair from damage caused by styling tools, which can compromise the integrity of straightened hair.
What Role Does Shampoo Play in Maintaining Hair Health and Preventing Breakage?
The role of shampoo is crucial in maintaining hair health and preventing breakage, especially after treatments like permanent hair straightening.
- Gentle Cleansing: A good shampoo should effectively cleanse the hair without stripping away essential oils.
- Moisture Retention: Shampoos that are formulated to retain moisture help in keeping the hair hydrated, which is essential after chemical treatments.
- pH Balance: Shampoos with a pH level similar to that of the hair can help maintain the hair’s natural structure and prevent damage.
- Damage Repair Ingredients: Shampoos containing proteins and vitamins can repair and strengthen hair, reducing the risk of breakage.
- Color Protection: For those who color their hair, using a shampoo that protects color can help maintain vibrancy and prevent fading.
Gentle Cleansing: A good shampoo should effectively cleanse the hair without stripping away essential oils. This is particularly important for hair that has been subjected to permanent straightening, which can leave it more vulnerable and susceptible to damage from harsh ingredients found in some shampoos.
Moisture Retention: Shampoos that are formulated to retain moisture help in keeping the hair hydrated, which is essential after chemical treatments. Ingredients such as glycerin and aloe vera can lock in moisture and prevent dryness, which can lead to brittleness and breakage.
pH Balance: Shampoos with a pH level similar to that of the hair can help maintain the hair’s natural structure and prevent damage. Hair’s natural pH is around 4.5 to 5.5, and using a shampoo that aligns with this range helps to keep the cuticle closed and intact, reducing frizz and enhancing shine.
Damage Repair Ingredients: Shampoos containing proteins and vitamins can repair and strengthen hair, reducing the risk of breakage. Ingredients such as keratin, biotin, and amino acids can penetrate the hair shaft, helping to rebuild and reinforce the hair structure that may have been compromised during the straightening process.
Color Protection: For those who color their hair, using a shampoo that protects color can help maintain vibrancy and prevent fading. Color-safe shampoos are often sulfate-free and contain antioxidants that shield the hair from environmental damage while preserving the integrity and lifespan of the color treatment.
How Can the Correct Shampoo Aid in Better Hair Recovery Post-Treatment?
The correct shampoo can significantly enhance hair recovery after permanent hair straightening by providing essential nourishment and protection.
- Sulfate-Free Formulas: These shampoos avoid harsh detergents, which can strip the hair of its natural oils and moisture. This is particularly important after straightening treatments, as the hair is already more susceptible to dryness and damage.
- Moisturizing Ingredients: Shampoos containing ingredients like argan oil, shea butter, or aloe vera help to hydrate and soften the hair. This moisture replenishment is critical for maintaining the elasticity and shine of chemically treated hair.
- pH-Balanced Shampoos: A shampoo with a balanced pH helps maintain the hair’s natural acidity level, which can be disrupted by chemical treatments. This balance protects the hair cuticle, promoting smoother and healthier strands.
- Protein-Enriched Shampoos: Formulas that include hydrolyzed proteins provide strength and repair to weakened hair. After permanent straightening, hair can become fragile, and protein helps to rebuild its structure, reducing breakage.
- Color-Safe Options: If the hair has also been color-treated, using a color-safe shampoo is essential. These shampoos are designed to be gentle on color-treated hair, preventing fading while still providing the care needed for straightened locks.
What Other Hair Care Products Should Be Used Alongside Shampoo for Optimal Results?
In addition to selecting the best shampoo after permanent hair straightening, incorporating complementary hair care products can enhance the results and maintain hair health.
- Conditioner: A high-quality, sulfate-free conditioner is essential for restoring moisture and ensuring that the hair remains soft and manageable post-straightening.
- Deep Conditioning Treatment: Regular use of a deep conditioning treatment can help repair any damage caused by the straightening process, providing extra hydration and nourishment.
- Leave-in Conditioner: A leave-in conditioner can provide additional moisture and protection throughout the day, helping to combat frizz and keep the hair smooth.
- Hair Serum: Utilizing a lightweight hair serum can add shine and smoothness while also protecting the hair from heat styling and environmental damage.
- Heat Protectant: If heat styling tools are used, a heat protectant is crucial to shield the hair from thermal damage and maintain its straight appearance.
- Hair Mask: Incorporating a hair mask once a week can offer intensive hydration and repair, ensuring that the hair stays healthy and resilient over time.
- Detangler Spray: A detangler spray can aid in preventing breakage and making the hair easier to comb, which is particularly beneficial for chemically treated hair.
- Scalp Treatment: A scalp treatment can help maintain scalp health, promoting a healthy environment for hair growth and ensuring that the hair remains strong.
A conditioner, particularly one designed for chemically treated hair, helps to restore moisture and detangle strands, which is vital after the straightening process. Deep conditioning treatments provide intensive hydration and repair, addressing any damage caused during the treatment.
Leave-in conditioners offer ongoing moisture and can help control frizz throughout the day. Hair serums add shine and protect against heat, while heat protectants are indispensable for safeguarding hair during styling.
Regular use of a hair mask can significantly improve hair health by offering deep nourishment, whereas detangler sprays are useful for preventing breakage during combing. Lastly, scalp treatments keep the scalp healthy and support hair growth, completing a comprehensive hair care regimen post-straightening.
Which Conditioners Complement Shampoos for Straightened Hair?
The best conditioners to complement shampoos for straightened hair focus on moisture, smoothness, and protection from damage.
- Moisturizing Conditioner: This type of conditioner is essential for maintaining hydration in straightened hair, which can become dry and brittle. Formulated with ingredients like aloe vera, glycerin, or natural oils, it helps to lock in moisture and keep the hair soft and manageable.
- Smoothing Conditioner: Designed to reduce frizz and enhance shine, smoothing conditioners create a protective layer around each hair strand. Ingredients such as silicones and keratin work to tame unruly hair and provide a sleek finish, making it easier to style and maintain straightened locks.
- Protein-Rich Conditioner: After permanent hair straightening, the hair structure can be weakened, so a protein-rich conditioner helps to rebuild and strengthen the hair. These conditioners often contain hydrolyzed proteins that penetrate the hair shaft, repairing damage and ensuring that the hair remains resilient and healthy.
- Color-Safe Conditioner: If the hair is dyed or treated in addition to being straightened, a color-safe conditioner is crucial. These products are formulated without harsh sulfates and other stripping agents, ensuring that the hair color remains vibrant while providing the necessary moisture and care for treated hair.
- Heat Protectant Conditioner: For those who frequently use heat styling tools, a heat protectant conditioner can offer additional defense against thermal damage. These conditioners coat the hair with a barrier that helps to shield it from high temperatures, reducing the risk of breakage and keeping the hair looking sleek and smooth.
Are There Specific Treatments That Enhance the Effects of Shampoo on Chemically Treated Hair?
There are specific treatments that can enhance the effects of shampoo on chemically treated hair, particularly after permanent hair straightening.
- Hydrating Masks: These treatments provide intense moisture to the hair, helping to restore hydration lost during the chemical straightening process. They often contain ingredients like argan oil or shea butter, which nourish the hair and improve its elasticity.
- Leave-In Conditioners: Leave-in conditioners are designed to provide ongoing hydration and protection throughout the day. They help to detangle hair and reduce frizz, making it easier to manage and style while also locking in moisture.
- Protein Treatments: Protein treatments help to strengthen the hair by replenishing the proteins that may have been damaged during chemical processes. These treatments can improve the hair’s structure and resilience, preventing breakage and ensuring that the hair remains healthy and shiny.
- Heat Protectants: Using heat protectants before styling can minimize damage from heat tools, which is especially important for chemically treated hair. These products create a barrier that protects the hair from high temperatures, reducing the risk of further damage and maintaining the straightened look.
- Moisturizing Shampoos: Opting for shampoos specifically formulated for chemically treated hair can enhance the overall care routine. These shampoos are usually sulfate-free and contain hydrating ingredients that help maintain the effects of straightening treatments while preventing dryness and brittleness.