20 Best Deep Conditioner For Keratin Treated Hair [2024]

Are you looking for the best deep conditioner for keratin treated hair? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling deep conditioner for keratin treated hair.

We Recommended:

# Preview Product
1 Vitamins Keratin Hair Mask Deep Conditioner - Biotin Protein with Castor Oil Repair for Dry Damaged... Vitamins Keratin Hair Mask Deep Conditioner - Biotin Protein with Castor Oil Repair for Dry...
2 artnaturals Argan Hair Mask Conditioner - (8 Oz/226g) - Deep Conditioning Treatment - Organic Jojoba... artnaturals Argan Hair Mask Conditioner - (8 Oz/226g) - Deep Conditioning Treatment - Organic...
3 Hair Mask For Dry Damaged Hair: Takes Hair from Super-Dry to Soft and Silky. Organic Coconut Oil,... Hair Mask For Dry Damaged Hair: Takes Hair from Super-Dry to Soft and Silky. Organic Coconut Oil,...
4 It's A 10 Miracle Deep Conditioner Plus Keratin for Unisex, 17.5 Ounce It's A 10 Miracle Deep Conditioner Plus Keratin for Unisex, 17.5 Ounce
5 Purple Hair Mask for Blonde Hair - No ​More​ Yellow ​or Copper Tones ​- Deep Conditioner... Purple Hair Mask for Blonde Hair - No ​More​ Yellow ​or Copper Tones ​- Deep Conditioner...
6 Argan Oil Shampoo and Conditioner Set Sulfate Free – Deep Nourishing Hair Products for Men and... Argan Oil Shampoo and Conditioner Set Sulfate Free – Deep Nourishing Hair Products for Men and...
7 Argan Oil Hair Mask - Deep Conditioner Sulfate Free for Dry or Damaged Hair with Jojoba Kernel Oil... Argan Oil Hair Mask - Deep Conditioner Sulfate Free for Dry or Damaged Hair with Jojoba Kernel...
8 GK HAIR Global Keratin Deep Conditioner Masque (7.05 Fl Oz/200 g) Intense Hydrating Repair Treatment... GK HAIR Global Keratin Deep Conditioner Masque (7.05 Fl Oz/200 g) Intense Hydrating Repair...
9 RUSK Deepshine Smooth Keratin Care Smoothing Conditioner, 12 Oz, Daily Conditioner for Chemically... RUSK Deepshine Smooth Keratin Care Smoothing Conditioner, 12 Oz, Daily Conditioner for Chemically...
10 Nexxus Keraphix ProteinFusion Conditioner with Keratin Protein and Black Rice Conditioner for... Nexxus Keraphix ProteinFusion Conditioner with Keratin Protein and Black Rice Conditioner for...
11 GK HAIR Global Keratin Colored Shield Shampoo and Conditioner Sets (22 Fl Oz/650ml) - Deep Cleansing... GK HAIR Global Keratin Colored Shield Shampoo and Conditioner Sets (22 Fl Oz/650ml) - Deep...
12 Moroccan Gold Series Treatment Mask – Deep Hydrating Argan Oil Hair Mask for Dry, Damaged, Color... Moroccan Gold Series Treatment Mask – Deep Hydrating Argan Oil Hair Mask for Dry, Damaged,...
13 Luseta Purple Hair Mask 16.9 Oz, Deep Conditioner for Color Treated Hair- Biotin, Hydrolyzed... Luseta Purple Hair Mask 16.9 Oz, Deep Conditioner for Color Treated Hair- Biotin, Hydrolyzed...
14 Damila Salt & Sulfate Free Shampoo & Conditioner for Keratin and Color Treated Hair - Professional... Damila Salt & Sulfate Free Shampoo & Conditioner for Keratin and Color Treated Hair -...
15 HASK KERATIN PROTEIN Smoothing Deep Conditioner Treatments for all hair types, color safe,... HASK KERATIN PROTEIN Smoothing Deep Conditioner Treatments for all hair types, color safe,...
16 Nexxus Keraphix Conditioner for Damaged Hair Keraphix with ProteinFusion Silicone-Free With Keratin... Nexxus Keraphix Conditioner for Damaged Hair Keraphix with ProteinFusion Silicone-Free With...
17 Keratin Repair Hair Mask - Keratin-Infused Anti-Frizz Moisturizing Hair Mask - Deep Conditioning and... Keratin Repair Hair Mask - Keratin-Infused Anti-Frizz Moisturizing Hair Mask - Deep Conditioning...
18 Olaplex Hair Perfector No 3 Repairing Treatment Olaplex Hair Perfector No 3 Repairing Treatment
19 Moroccanoil Intense Hydrating Hair Mask, 2.53 Fl. Oz Moroccanoil Intense Hydrating Hair Mask, 2.53 Fl. Oz
20 BIOLAGE Color Last Shampoo | Color Safe Shampoo | Helps Protect Hair & Maintain Vibrant Color |... BIOLAGE Color Last Shampoo | Color Safe Shampoo | Helps Protect Hair & Maintain Vibrant Color |...
SaleBestseller No. 1
Vitamins Keratin Hair Mask Deep Conditioner - Biotin Protein with Castor Oil Repair for Dry Damaged...
  • STUNNING SOFT SHINY SILKY HAIR IN MINUTES - Professional Renewing Silk Softener With Keratin Collagen Moroccan Argan & Coconut Oils for Sleek Smooth...
  • INTENSIVE DEEP CONDITIONING REPAIR FOR DAMAGED HAIR - Nourishing Therapy Solution Restores & Hydrates Color Treated Dry Hair to Health. Best Intense...
  • BIOTIN & CASTOR OIL COMPLEX STRENGTHENING MOISTURIZER - Ultra Moisturizing Pro Hydrating Nourishment Boost for Healthy Mane. Repairing Spa Like After...
  • ADVANCED FRIZZ CONTROL & LONG LASTING MOISTURE - Antifrizz Hydration Ease for Frizzy Hair. Curl Booster & Split Ends Tamer for Smoother Styling. Anti...
  • SAFE WEIGHTLESS FORMULA WON'T WEIGH DOWN THIN FINE HAIR - Non Oily Volumizing Product for Wavy & Normal Textures. Sulfate Paraben & Cruelty Free. No...
SaleBestseller No. 2
artnaturals Argan Hair Mask Conditioner - (8 Oz/226g) - Deep Conditioning Treatment - Organic Jojoba...
  • ARGAN OIL : Argan oil is known for its ability to help hair restore, enhance and grow. The natural moisturizer will help repair, dry, brittle and...
  • FOR ALL HAIR TYPES : artnaturals argan oil hair mask is for both men and women, straight or curly hair, blondes or brunettes. This hair mask is the...
  • RESTORATIVE FORMULA : Our natural and organic ingredients help repair hair damage and prevent any effects from heat and excess styling. The hydrating...
  • DEEP CONDITIONING AND MOISTURIZING : This powerful moisturizer will wash away all of the excess oils and dirt from your hair to get that beautiful...
  • SATISFACTION GUARANTEED : ArtNaturals offers a 100% satisfaction guaranteed or your money back. Try it risk free with no questions asked and top...
Bestseller No. 3
Hair Mask For Dry Damaged Hair: Takes Hair from Super-Dry to Soft and Silky. Organic Coconut Oil,...
  • REVIVES LIFELESS, DRY HAIR WITHOUT THE STRONG ODOR: A scent as refreshing as a tall glass of water, this damaged hair treatment is formulated with...
  • REPAIRS DAMAGE IN YOUR HAIR FROM EXCESSIVE HAIR COLORING: This bond-repairing hair mask for color treated hair can’t help you fix things with your...
  • TRANSFORM YOUR BRITTLE, STIFF HAIR INTO SOFT, DEFINED CURLS: This ultra-hydrating hair mask for curly hair is formulated with organic fair trade shea...
  • SOFTEN AND HYDRATE YOUR HAIR WITHOUT WEIGHING IT DOWN: You don’t need a million products to get the full, shiny hair of your dreams. With the...
  • WE STAND BEHIND OUR CUSTOMERS AND PRODUCTS: Experience the benefits of this organic hair mask for yourself. If you're not delighted, our highly...
SaleBestseller No. 4
It's A 10 Miracle Deep Conditioner Plus Keratin for Unisex, 17.5 Ounce
  • Miracle deep conditioner plus keratin was launched by the design house of it's a 10
  • It is recommended for casual wear
  • Miracle deep conditioner plus keratin by it's a 10 for unisex - 175 oz conditioner
SaleBestseller No. 5
Purple Hair Mask for Blonde Hair - No ​More​ Yellow ​or Copper Tones ​- Deep Conditioner...
  • NO MORE YELLOW: Say goodbye to unsightly copper and artificial yellow shimmer with this blonde toner​ purple hair mask from Bellisso; Balance out...
  • BOTANICAL ESSENCES: This Bellisso ​purple mask ​is also enriched with herbal extracts to bring your hair to life; With ​Morrocan argan oil​...
  • DEEPLY HYDRATING: Aside from balancing tone, we’ve formulated our ​purple hair mask​ to penetrate deep into every follicle to hydrate and...
  • SULFATE FREE: Say goodbye to questionable sulfates and parabens with our purple ​hair mask for color treated hair​; Better yet, our purple ​hair...
  • SUPERIOR PROTECTION: Our purple ​hydrating hair mask​ binds a protective coating to each strand of hair to help stop breakage, split ends and...
SaleBestseller No. 6
Argan Oil Shampoo and Conditioner Set Sulfate Free – Deep Nourishing Hair Products for Men and...
  • NATURAL ARGAN OIL: Bellisso ​shampoo and conditioner​ contains natural ​argan oil​ and is rich in nourishing botanicals; Argan, a natural...
  • DEEPLY CLEANSING: Our ​argan oil shampoo​ has been engineered for a powerful deep clean; Remove dirt buildup and grime with this women’s and...
  • HYDRATING CONDITIONER: Bellisso ​deep conditioner ​has been specifically formulated to nourish and moisturize frizzy locks and split ends;...
  • SULFATE FREE: Our ​sulfate free shampoo​ and conditioner leave a lighter footprint on the planet and are better for your skin; In addition,...
  • ALL HAIR TYPES: This is the best shampoo and conditioner set for all hair types; Containing pure argan oil for normal, oily, curly, dry and damaged,...
SaleBestseller No. 7
Argan Oil Hair Mask - Deep Conditioner Sulfate Free for Dry or Damaged Hair with Jojoba Kernel Oil...
  • RESTORES HAIR BREAKAGE WITH DEEP CONDITIONER. Repairs and strengthens weak, damaged, and over-processed hair to restore a healthy look
  • THE HIGHEST STANDARDS OF EXCELLENCE. Extra deep conditioner moisturizes, protects and smooths hair with unique combination of natural oils, proteins...
  • NATURAL INGREDIENTS. It contains natural ingredients: Jojoba Oil, Argan Kernel Oil, Collagen Protein, Hydrolyzed Keratin. Argan Oil Hair Mask is...
  • EFFECTIVE FOR ALL TYPES OF HAIR: It is a perfect hair mask for men and women. It is a luxurious elixir hair growth mask for damaged, dry, curly or...
  • 100% SATISFACTION GUARANTEED: We invest much needed time into finding and researching the best ingredients to use in our Argan Oil Hair Masque. If for...
Bestseller No. 8
GK HAIR Global Keratin Deep Conditioner Masque (7.05 Fl Oz/200 g) Intense Hydrating Repair Treatment...
  • DRY DAMAGE HAIR TREATMENT: Helps treat damaged hair by penetrating deep into the cuticles, conditions hair into shape. Repairs, Restores, and...
  • FORMULATED FOR ALL HAIR TYPES: This creamy rich and luxurious conditioning treatment helps revive dry, damaged weak or chemically treated hair,...
  • KERATIN PROTEIN AND JOJOBA SEED OILS: Our Protein Hair Masque is formulated with Jojoba Seed Oils as well as keratin proteins to help moisturize and...
  • HELPS MAKE HAIR SMOOTH AND MANAGEABLE: Our Deep Conditioning Mask reconstructs, nourishes and smooths the hair by coating each strand and strengthens...
  • All GK HAIR products including this deep conditioner are sustainably produced and cruelty-free and all our products are formulated with no silicone,...
SaleBestseller No. 9
RUSK Deepshine Smooth Keratin Care Smoothing Conditioner, 12 Oz, Daily Conditioner for Chemically...
  • With a sodium chloride-free, color-safe formula
  • Contains natural Keratin, vitamins and hydrating marine botanicals
  • Offers thermal protection and fights against humidity
SaleBestseller No. 10
Nexxus Keraphix ProteinFusion Conditioner with Keratin Protein and Black Rice Conditioner for...
  • DAMAGE REPAIR SYSTEM: Visibly heal signs of severe hair damage, when used as a system after the first use. This conditioner helps repair from within...
  • SMOOTHING KERATIN: This conditioner for damaged hair reaches into the hair fiber to help repair from within and deliver a smooth, conditioned feel.
  • PROTEINFUSION BLEND: Nexxus conditioner is formulated with an exclusive ProteinFusion blend with Keratin Protein and Black Rice that helps replenish...
  • SALON-CRAFTED HAIR CARE: Achieve salon quality results at home when you use the Nexxus Keraphix conditioner of keratin hair treatments.
  • SEE THE SCIENCE: Nexxus scientists used advance protein science and custom crafted our Keraphix conditioner to replenish the nutrients damaged hair...
Bestseller No. 11
GK HAIR Global Keratin Colored Shield Shampoo and Conditioner Sets (22 Fl Oz/650ml) - Deep Cleansing...
  • UV/ UVA Shield Protection: Shield Shampoo and Conditioner keeps your hair vibrant and strong look by our All-Natural Formula, that helps protect...
  • Color Protection: This shampoo and conditioner not only helps protect your hair, but also helps your hair color lasts longer. It cleanses the scalp,...
  • Repairs Split Ends: With added aloe vera and rich in natural flower seed Oil’s ingredients, shield shampoo and conditioner repairs hair from the...
  • No Harsh Chemicals: GKhair shield shampoo and conditioner is free from any harmful chemicals. like sulfate, paraben, gluten, silicone and cruelty-free...
  • For Best Results: GK hair shield shampoo can be applied on wet hair after any hair color while you can use the GK hair shield conditioner after using...
SaleBestseller No. 12
Moroccan Gold Series Treatment Mask – Deep Hydrating Argan Oil Hair Mask for Dry, Damaged, Color...
  • Moroccan Gold Series Treatment Mask fortifies hair with hydration, nourishing each strand of hair and sealing split ends for complete repair and...
  • The revitalizing formula of Argan Oil Hair Mask strengthens hair to make it more manageable and resistant to breakage, while creating silky, soft and...
  • Conditions, nourishes and locks in moisture. Strengthens hair to make it more manageable.
  • Protects hair against breakage, dryness, and damage
  • Creates silky, soft and flexible hair with a healthy, beautiful shine
SaleBestseller No. 13
Luseta Purple Hair Mask 16.9 Oz, Deep Conditioner for Color Treated Hair- Biotin, Hydrolyzed...
  • Color Brightening Hair Mask conditions and provides moisture to blond and gray hair. It neutralizes unwanted yellow tones and removes brassiness from...
  • Biotin: Also known as Vitamin B7, is a water-soluble vitamin that acts as a coenzyme in the body, which contributes to the production of healthy hair.
  • Hydrolyzed Collagen: The most abundant protein in the human body that helps renew cells, improves the health of skin and hair and ensures the...
  • Keratin Protein: The essential component of hair. It is a protein formed by the combination of 18 amino acids, which helps refresh dryness and damaged...
  • 100% Money Back Guarantee --If for any reason at all you are unsatisfied with your purchase of Color brightening Hair Mask, you are eligible for a...
Bestseller No. 14
Damila Salt & Sulfate Free Shampoo & Conditioner for Keratin and Color Treated Hair - Professional...
  • SALT, SULFATE & SLS FREE SHAMPOO AND CONDITIONER SET - Hydrates and provides intense nourishment; Safe for color and keratin treated hair; Contains...
  • HEALTHY & SAFE KERATIN ENHANCEMENT - Contains ZERO Salt (Sodium Chloride), Sulfates, Parabens, or Phthalates; A natural shampoo and conditioner...
  • BRINGS HAIR BACK TO LIFE - Nourishing shampoo and conditioner moisturizes & gently cleanses hair; Removes hair frizz, softens and defines curls;...
  • WORKS ON ALL HAIR TYPES & BEST VALUE FOR YOUR MONEY - Safe on Keratin and Color treated hair; Can be used on a daily basis by women and men; 16.9 Fl...
  • 100% NO RISK MONEY BACK GUARANTEE - Our mission is to provide you with the best hair care products; we want you to be completely satisfied with the...
Bestseller No. 15
HASK KERATIN PROTEIN Smoothing Deep Conditioner Treatments for all hair types, color safe,...
  • Smoothing Keratin Protein | This deep conditioner is an ultra-restorative smoothing treatment that leaves all hair types feeling moisturized, looking...
  • Reduce Breakage | Keratin helps to repair damage, reduce breakage and static. Perfect for over-processed and color-treated hair.
  • Fruity Floral Scent | Experience the fresh fruity floral scent of HASK Keratin Protein Smoothing collection to awaken your senses.
  • How to Use | Apply a generous amount of deep conditioner to clean, wet hair. Massage into hair focusing on damaged areas. Leave on for 10 minutes....
  • Free Of | Silicones, sulfates, parabens, phthalates, gluten, drying alcohol and artificial colors.
SaleBestseller No. 16
Nexxus Keraphix Conditioner for Damaged Hair Keraphix with ProteinFusion Silicone-Free With Keratin...
  • POWERFUL PROTEIN INFUSION: Visibly heal signs of hair damage with Nexxus Keraphix Conditioner for Damaged Hair. Bring the salon experience home with...
  • SMOOTHING KERATIN: Conditioner reaches into the hair fiber to help repair from within and deliver a smooth, conditioned feel. Continued use enables...
  • KERATIN TREATMENT INFUSED WITH PROTEINFUSION: Inspired by Nexxus New York City salon, Nexxus conditioner with Keratin Protein and Black Rice is your...
  • SALON-CRAFTED HAIR CARE: Take the first step to rejuvenated hair with our hair repair treatment for damaged hair. Nexxus Conditioner helps repair...
  • THE SCIENCE OF PROTEIN: Nexxus knows hair structure consists of up to 90% protein, so Nexxus scientists use leading-edge research called Proteomics to...
Bestseller No. 17
Keratin Repair Hair Mask - Keratin-Infused Anti-Frizz Moisturizing Hair Mask - Deep Conditioning and...
  • Keratin Hair Serum & Intense Repair Hair Mask: This bundle includes Keratin Intense Hair Serum, formulated to rebuild strands from within and forms a...
  • Keratin Intense Hair Serum: This keratin repair treatment helps rebuild and restore the structure of the hair to renew elasticity, hair-shine, and...
  • Intense Repair Hair Mask: Enriched with pentanol, which enhances the effects of keratin, this hair straightening mask retains hair-straightening...
  • Sodium Chloride Salt Free: Expertly formulated to meet all the needs of damaged hair, this gentle keratin treatment repair serum is perfect for hair...
  • Make Every Day A Great Hair Day: Natural Formula launched in 1987 fostering the belief that every woman deserves beautiful hair that will give her...
Bestseller No. 18
Olaplex Hair Perfector No 3 Repairing Treatment
  • Repairs damaged and compromised hair, strengthens and protects hair structure, restores healthy appearance and texture
  • Apply a generous amount from roots to ends on unwashed towel-dried hair.
  • Comb through once and leave on for a minimum of 10 minutes or more. Rinse from hair, shampoo, and condition.Healthy hair
  • Use by date: This product’s use by date is determined by the Period After Opening symbol. The Period After Opening symbol is marked by a box with a...
Bestseller No. 19
Moroccanoil Intense Hydrating Hair Mask, 2.53 Fl. Oz
  • High performance
  • Conditions dryness to improve texture
  • Argan oil rich treatment
Bestseller No. 20
BIOLAGE Color Last Shampoo | Color Safe Shampoo | Helps Protect Hair & Maintain Vibrant Color |...
  • Paraben Free Shampoo: Low pH shampoo for color-treated hair helps prolong color vibrancy. Gently cleanses to prevent unnecessary stripping of color....
  • Benefits: Inspired by nature's orchid, Color Last helps maintain the color, depth, tone and shine for vivid color-treated hair. Gives hair...
  • Additional Benefits: A professional inspired hair treatment to help protect hair balance moisture and even out the hairs surface for saturated shiny...
  • Suggested Use: Apply to wet hair and lather with a massaging motion. We recommend that you pair Color Last Shampoo with Color Last Conditioner to help...
  • Color Last Collection: Color Last system of Shampoo and Conditioner, nourishes and protects to help maintain the shine of color-treated hair. Color...

Having trouble finding a great deep conditioner for keratin treated hair?

This problem is well understood by us because we have gone through the entire deep conditioner for keratin treated hair research process ourselves, which is why we have put together a comprehensive list of the best deep conditioner for keratin treated hairs available in the market today.

After hours of searching and using all the models on the market, we have found the best deep conditioner for keratin treated hair for 2023. See our ranking below!

How Do You Buy The Best Deep Conditioner For Keratin Treated Hair?

Do you get stressed out thinking about shopping for a great deep conditioner for keratin treated hair? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching deep conditioner for keratin treated hair, which is why we have assembled a comprehensive list of the greatest deep conditioner for keratin treated hair available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for deep conditioner for keratin treated hair that you consider buying. Your questions might include the following:

  • Is it worth buying an deep conditioner for keratin treated hair?
  • What benefits are there with buying an deep conditioner for keratin treated hair?
  • What factors deserve consideration when shopping for an effective deep conditioner for keratin treated hair?
  • Why is it crucial to invest in any deep conditioner for keratin treated hair, much less the best one?
  • Which deep conditioner for keratin treated hair are good in the current market?
  • Where can you find information like this about deep conditioner for keratin treated hair?

We’re convinced that you likely have far more questions than just these regarding deep conditioner for keratin treated hair, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for deep conditioner for keratin treated hair, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible deep conditioner for keratin treated hair. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an deep conditioner for keratin treated hair buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available deep conditioner for keratin treated hair currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of deep conditioner for keratin treated hair has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an deep conditioner for keratin treated hair?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your deep conditioner for keratin treated hair.
  5. Customer Ratings: Number ratings grade deep conditioner for keratin treated hair objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their deep conditioner for keratin treated hair.
  7. Product Quality: You don’t always get what you pay for with an deep conditioner for keratin treated hair, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an deep conditioner for keratin treated hair is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining deep conditioner for keratin treated hair information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding deep conditioner for keratin treated hair is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

Related Post:

FAQ:

Q: What is the best keratin conditioner?

A: Professional keratin treatment. Salon-quality keratin treatments are extremely potent and are typically used to straighten and smooth the hair. Keratin oil treatment. A keratin oil treatment is similar to a leave-in treatment,so it can be applied daily. … Leave-in keratin treatment. … Deep conditioner keratin treatment. …

Q: Which keratin treatment is best?

A: KERATIN TREATMENT: Also known as Brazilian blow dry … Both treatments have to be followed up by a particular type of shampoo which goes with each treatment. It’s best to get both treatments done by a hairdresser at a salon.

Q: What is keratin shampoo and conditioner?

A: Keratin shampoo and conditioner is believed to improve the strength and durability of hair. There are two types of keratin conditioner — One that is intended to be used after shampooing and then rinsed out before the hair is dried and styles, and another that is intended to be left in the hair until the next shampoo.