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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
Best For
Describe Yourself
Hair Type
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 ...
1016 results
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
Smells AMAZING
I've used a few products from Redken, comparing other shampoos from this line I would say this one is definitely my favorite. The smell is amazing, my hair feels clean, and it works with both curly and straight hair textures. My hair is normally dry, and in my opinion it's really helped bring moisture to my hair.
Questions
Q&A
Showing 5 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