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Highlights
Summary
Redken Extreme Length Shampoo helps strengthen damaged and weak hair to promote healthy hair growth to reach its maximum length potential. This biotin shampoo prevents hair breakage, fortifies hair, and reduces the look of split ends while gently cleansing your strands.
Benefits
- Helps achieve maximum hair length with up to 6 inches of growth in one year
- Fortifies and strengthens hair for 81% less breakage*
- Promotes healthy, strong hair from root to tip
- Helps prevent split ends and reduce the look of split ends by 78%**
- Gently cleanses hair
- Ideal for all hair types and textures who want to grow longer hair
- *When used as a system of Extreme Length Shampoo, Conditioner and Sealer vs non-conditioning shampoo**When used as a system of Extreme Length Shampoo, Conditioner and Sealer
Key Ingredients
- Biotin, a B-vitamin that helps promote healthy hair growth, and a blend of proteins, to help strengthen and fortify hair.
Item 2580398
Use as a complete system with Extreme Length Conditioner with Biotin and Extreme Length Leave-In Treatment. Apply to wet hair, lather, and rinse. Follow with Extreme Length Conditioner with Biotin and Extreme Length Leave-In Treatment. In case of contact with eyes, rinse them immediately.
Aqua/Water/Eau, Sodium Laureth Sulfate, Sodium Chloride, Cocamidopropyl Betaine, Citric Acid, Sodium Hydroxide, Parfum/Fragrance, Propylene Glycol, Polyquaternium-10, Sodium Benzoate, Hexylene Glycol, Salicylic Acid, Benzyl Benzoate, Limonene, Benzyl Alcohol, Linalool, 2-Oleamido-1,3-Octadecanediol, Biotin.
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Reviews
Review Snapshot
by PowerReviews
Ratings Distribution
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Most Helpful Positive Review
My Fave!!
About 9 months ago I was sent this shampoo, conditioner and leave in treatment to review by a third party company. I have to admit, the first thing I noticed was the scent. It's marvelous!! The second thing I noticed is that after a couple of uses, my hair didn't break near as much. There wasn't a l...
Most Helpful Critical Review
Scent is wonderful, overall product not as much
I received this product to try for free in exchange for sharing my opinion about it. I have fine hair that lacks volume, as well as certain pieces that don't really seem to be growing at all, so I was very excited to try this product. The first thing that I noticed about it was the scent. Wow! This ...
1017 results
Make my hair thin and fall out way too much
I brought the shampoo and conditioner because I heard great things about it from 2 of my coworkers however, I only wash my hair 2 time away and I noticed after 3 months of use my hair falling out ALOT, now it's thin. I wish I could return it.
HAIR FELL OUT
Ive been using the shampoo and conditioner combo for a few months. My hair fell out more than normal. While detangling, my hair SNAPPED midway. i had a whole handful for hair that fell out in just ONE wash. My hair is so dry and thin. Im SO dissapointed and it will take me so long to grow my hair back.
Helped reduce split end and grows my hair healthier !!
Its a bit too pricy but ive used this product since May 2025. You HAVE to be consistent and you WILL see results with this shampoo. WAY BETTER than the drugstore shampoos I double cleanse my hair. This shampoo has helped reduced my split ends, friziness, and increased the look of a healthy hair.
I recommend this shampoo. I don't recommend the conditioner.
This shampoo leaves hair clean. It has a lot of slip so a little goes a long way. It has lasted me more than 4 months. It would of lasted me a whole year if my brother and dad werent using it as bodywash every time i forgot it in the shower. I wash my hair every week and use this 3x a month. As far as if it helps with hair growth. My hair has grown. Its past my boobs, at my ribs. I damaged my hair using 450 heat on the flat iron. My curls are still perfect but my hair is thinner, falling out, i can see that theres alot of breakage all thoughout my hair. Ive been growing out my hair and doing cuts and trims often. I have less fall out. Although its still alot for my liking it is less then before. I cant atribute all the hair growth, and less fall out to just this shampoo. I do hydation masks after every wash. Ive used the k18 treatment 3x. Ive been trying my best to keep up with my wash/ hair care routine to keep it clean and tangle free ass that is the only way to retain length. Its not a miracle product that going to give crazy results but it does work with a good hair routine. The biggest tip i would give if you try it and find it drying is follow with a hydration shampoo and a hydration mask. NO NEED FOR THE EXPENSIVE CONDITIONER. Save your money.
The best
I have tried every shampoo out there this is the best one for my fine long straight hair. So light and its the only shampoo that has not made my hair feel greasy and heavy. Love it
Questions
Q&A
Showing 20 out of 173 Questions
- Q
Hello i have short curly hair. I am planning to buy shampoo and conditioner. Do i have to but the mask and leave in treatment for this or is it optional. Whats the results if i do and dont?
- Asked by Anelys
- Official Answer By Redken - BEThe mask and leave-in treatments are completely optional—starting with just the shampoo and conditioner will give you a great foundation of basic strength and cleansing, while adding the full routine provides maximum repair and protection against breakage. However, since you have curly hair, keep in mind that the Extreme line is heavily focused on protein; if your curls are mostly in need of moisture, you might want to consider a hydrating collection instead to keep your curls soft and bouncy!Was this answer helpful to you
- Q
Is this line color safe? My color lifts easily, and I need color safe guaranteed.
- Asked by michelle
- Official Answer By Redken - BEHi there! Yes, Redken Extreme Length Shampoo is suitable and safe for color-treated hair. Our Extreme Length system (formulated with Biotin and Castor Oil) is specifically designed to fortify and strengthen damaged or chemically treated hair, helping you prevent breakage so you can reach your length goals without compromising health. However, because you mentioned your color lifts easily and you are looking for a guaranteed color-protection guarantee, we want to share a quick recommendation: For maximum color longevity: While Extreme Length is safe for color, it is primarily formulated for strength and growth. If preserving delicate or easily faded color is your top priority, we recommend Redken Color Extend Magnetics Shampoo or Redken Acidic Color Gloss Shampoo. Both of these lines are 100% sulfate-free and engineered specifically to lock in color vibrancy, seal the cuticle, and prevent premature fading. If your primary goal is growing longer, stronger hair that has been weakened by color services, Extreme Length Shampoo is a great choice! Feel free to consult your Redken stylist to tailor the perfect routine for your specific color needs.Was this answer helpful to you
- Q
Would you recomend using this product after using the Redken Pink Volumizing Shampoo/Conditioner? I would try to like a new shampoo just becuase I have used the pink bottle for almost a year now .
- Asked by Jocy
- Official Answer By Redken - BEHi there! Absolutely! We definitely recommend trying Redken Extreme Length Shampoo! It’s a fantastic choice, especially if you're looking for a change after using our Volume Injection line (the pink bottle). Switching up your routine is a great way to give your hair a fresh boost. While Volume Injection is formulated to add instant body and root lift, Extreme Length Shampoo (infused with Biotin and Castor Oil) focuses on fortifying your hair structure to prevent breakage and help you achieve longer, stronger, and healthier-looking hair. Pro-Tip for exact customization: You can even mix and match! If you still love the weightless body from your Volume Injection line, try pairing the Extreme Length Shampoo with your Volume Injection Conditioner, or alternate between the two routines depending on whether your hair needs extra strength or extra lift on a given day.Was this answer helpful to you
- Q
What does shampoo smell like?
- Asked by Liz
- Official Answer By Redken - BEHi there! Redken's Extreme Length Shampoo features a delightfully sweet, fresh, and uplifting fragrance! Officially, its scent profile is a beautiful Mixed Berry blend. When you use it, you can expect: Sweet & Sugary Notes: A warm, comforting base that many customers describe as smelling like soft marshmallow, vanilla, or spun sugar. Bright Fruity Accents: A cheerful pop of sweet berries and light citrus that makes your shower feel energized. Clean & Powdery Finish: A soft, "salon-fresh" dry-down that leaves your hair smelling clean and beautifully feminine long after your wash. It is a sweet and warm gourmand fragrance that is noticeable in the shower but fades to a lovely, subtle scent once your hair is dry!Was this answer helpful to you
- Q
Why does the Redken shampoos have such a strong scent to them? It flairs up my allergies. I have tried the one in the red bottle and the blue bottle.
- Asked by green eyes 777
- Official Answer By Redken - BEHi there! We are so sorry to hear that our fragrances have triggered your allergies. At Redken, we use professional-grade, signature fragrances in our formulas—including our blue bottle (Extreme/Extreme Length) and red bottle (Acidic Bonding Concentrate)—to deliver the luxurious, lingering "salon-fresh" experience that many of our clients expect. However, we completely understand that strong scents can be highly sensitizing for those with allergies or ingredient sensitivities. Because we want you to feel comfortable and safe using our products, here is how we can help: Full Ingredient Transparency: We list all fragrance components (like Limonene, Linalool, or Hexyl Cinnamal) on our bottles and product pages so you can cross-reference them with any known personal triggers. No Hypoallergenic Claims: Because we formulate for professional high-performance, Redken products are not classified as hypoallergenic or fragrance-free. We Want to Help You Directly: If you have a specific allergy or would like to share the details of your experience, please reach out to our Consumer Care team at 1-800-423-5280. We would love to help you find a more suitable solution or assist you further!Was this answer helpful to you
- Q
This this good for colored hair
- Asked by A
- Official Answer By Redken - BEHi there! Our Extreme Length Shampoo helps strengthen damaged and weak hair to promote healthy hair growth to reach its maximum length potential. This biotin shampoo prevents hair breakage, fortifies hair, and reduces the look of split ends while gently cleansing your strands. This shampoo is color safe. We hope you can give it a try and love it!Was this answer helpful to you
- Q
Is this good for low prosperity hair?
- Asked by Says
- Official Answer By Redken - BEHi there! We appreciate your interest in our Extreme Length Shampoo. Yes! This shampoo is designed for all hair types, wanting to reduce breakage and maximize hair length. We hope this helps!Was this answer helpful to you
- Q
Does it help soften dry hair? My hair is normally dry, coarse, frizzy. Length is down to my waist.
- Asked by T
- Official Answer By Redken - BEHi there! We appreciate your interest in our Extreme Length Shampoo! This biotin shampoo is designed to prevent hair breakage, fortifies hair, and reduces the look of split ends while gently cleansing your strands. If your main concern in your haircare routine is softening and nourishing dry hair, we suggest our All Soft Shampoo and Conditioner. Redken's All Soft Shampoo cleanses, restores, and softens dry, brittle hair. This professional product provides 15x more conditioning when used with the complete All Soft System of Shampoo, Conditioner and Argan Oil. Check it our here: https://tinyurl.com/26vrzjjk. We hope this information helps!Was this answer helpful to you
- Q
How many times a week should this product be used?
- Asked by nico
- Official Answer By Redken - BEHi there! We appreciate your interest in our Extreme Length Shampoo. This product is safe for daily use or as frequently as you wish. We hope this helps!Was this answer helpful to you
- Q
Can you use this as a daily shampoo?
- Asked by Bae
- Official Answer By Redken - BEHi there! We appreciate your interest in our Extreme Length Shampoo. Yes! This product is safe for daily use or as frequently as you wish. We hope this helps!Was this answer helpful to you
- Q
is this product good for high porosity hair?
- Asked by angie
- Official Answer By Redken - BEHi there! Thank you for reaching out about our Extreme Length Shampoo For Longer, Stronger Hair. That is a great question! Yes, Redken Extreme Length is an excellent choice for high porosity hair. High porosity hair often has gaps in the cuticle, which causes it to lose moisture quickly and break easily. Our Extreme Length Shampoo is infused with Biotin and Soy Protein, which help to 'fill' those gaps and reinforce the hair fiber from the inside out. This strengthening action is exactly what high porosity hair needs to reduce breakage and successfully reach longer lengths. Pro-Tip: Because high porosity hair also craves intense moisture, we recommend following your shampoo with the Extreme Length Conditioner and a weekly treatment like our Acidic Bonding Concentrate Mask to lock in that hydration and seal the cuticle for maximum shine!Was this answer helpful to you
- Q
How long is the sale for?
- Asked by Barbie
- Official Answer By Redken - BEHi there! Thank you for reaching out about our Extreme Length Shampoo. Because we are sold through various professional salons and retail partners (like Ulta, Sephora, Amazon, and local salons), the duration of a sale is determined by the individual retailer where you are shopping. To find out exactly when the promotion ends, we recommend: Checking the promotional banner on the website where you are currently viewing the product. Looking at your email inbox for any 'Sale Ends' notifications from that retailer. Reaching out to that store's customer service directly for the specific end date. Don't wait too long—we want to make sure you get that extra length and strength for your hair at a great price!Was this answer helpful to you
- Q
Is this color safe?
- Asked by tiffany
- Official Answer By Redken - BEHi there! Thank you for reaching out about our Extreme Length Shampoo. Yes, we're pleased to confirm that our Redken Extreme Length Shampoo For Longer, Stronger Hair is indeed color-safe! We understand the importance of protecting your vibrant hair color, and this shampoo has been specifically formulated with color-treated hair in mind. It's designed to gently cleanse and strengthen your hair from root to tip, preventing breakage and promoting healthy hair growth, all without compromising your beautiful hair color. So, you can confidently use our Extreme Length Shampoo as part of your routine to achieve longer, stronger hair, knowing that it's safe for your colored strands!Was this answer helpful to you
- Q
Is it safe to use on extensions
- Asked by Xoxoxo
- Official Answer By Redken - BEHi there! We appreciate your interest in our Extreme Length Shampoo. We do not believe that there should be any issue with using our products; however, since our products have not been tested in conjunction with hair extensions or hair pieces, we cannot provide you with usage information. We suggest you contact the manufacturer of that product and follow their advice.Was this answer helpful to you
- Q
What does it smell like?
- Asked by arudloff1
- Official Answer By Redken - BEHi there! We appreciate your interest in our Extreme Length Shampoo. This This biotin shampoo has a light blueberry fragrance. It prevents hair breakage, fortifies hair, and reduces the look of split ends while gently cleansing your strands. We hope this helps!Was this answer helpful to you
- Q
Is the Redken extreme length shampoo phthalate-free?
- Asked by Marie
- Official Answer By Redken - BEHi there! Thank you for reaching out about our Extreme Length Shampoo. Based on our current information, there isn't an explicit statement or certification from Redken confirming that the Extreme Length Shampoo is phthalate-free. While the product is highlighted as being free of other substances like parabens, gluten, silicones, and dyes, phthalates are not specifically mentioned in these "free from" lists. We understand that ingredient transparency is very important to our customers. If you require a definitive answer, we recommend reaching out directly to Redken's customer care team. They would be able to provide the most precise and up-to-date information regarding the specific formulation of their Extreme Length Shampoo.Was this answer helpful to you
- Q
Is the Redken Extreme Length Shampoo (and conditioner) safe for those with celiac disease?
- Asked by JJ74
- Official Answer By Redken - BEHi there! Thank you for reaching out about our Extreme Length Shampoo For Longer, Stronger Hair. We can confirm that Redken Extreme Length Shampoo with Biotin is considered gluten-free, as assessed by SkinSAFE. For the Redken Extreme Length Conditioner, we always recommend checking the most current ingredient list directly on the product packaging, as formulations can sometimes vary. We are committed to providing safe products for our consumers.Was this answer helpful to you
- Q
Hi, is this shampoo sulfate free ?
- Asked by JQ
- Official Answer By Redken - BEHi there! We appreciate your interest in our Extreme Length Shampoo. is formulated with Biotin, Castor Oil & Redken's Length Care Complex to strengthen damaged and weak hair and promote healthy hair growth. Extreme Length Shampoo helps prevent hair breakage to achieve your desired length. This shampoo is not sulfate-free. We hope you can give it a try and love it!Was this answer helpful to you
- Q
Is this product good for natural curly gray hair?
- Asked by Look
- Official Answer By Redken - BEHi there! We appreciate your interest in our Extreme Length Shampoo. It is formulated with Biotin, Castor Oil & Redken's Length Care Complex to strengthen damaged and weak hair and promote healthy hair growth. Extreme Length Shampoo With Biotin is best for those seeking to strengthen damaged hair and reduce breakage for all hair types.Was this answer helpful to you
- Q
Will this work on dyed hair?
- Asked by V
- Official Answer By Redken - BEHi there! We appreciate your interest in our Extreme Length Shampoo. It is formulated with Biotin, Castor Oil & Redken's Length Care Complex to strengthen damaged and weak hair and promote healthy hair growth. Extreme Length Shampoo helps prevent hair breakage to achieve your desired length. This shampoo is best for those seeking to strengthen damaged hair and reduce breakage. We hope you can give it a try and love it!Was this answer helpful to you