The Redken Extreme Length Shampoo is worth buying if your hair breaks before it gets long. It’s a gentle gel with biotin and 1% Length Care Complex, pH balanced, and safe on keratin-treated hair. I’m on my fourth bottle. Buy it for breakage. Skip it if your scalp is oily and needs a deep clarifying wash.
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How this review was made: written from my own video review of this product. Every opinion here is my own, from using it myself.
| Formula | Gentle gel shampoo |
|---|---|
| Key ingredients | Biotin, castor oil, 1% Length Care Complex |
| Breakage claim | 81% less breakage |
| Split ends | Look of split ends reduced 78% |
| Hair type | Normal, damaged, all textures |
| Use | On wash days |
Fourth Bottle, and I Need Another
Three people with completely different hair, my husband’s short, mine keratin-treated, my daughter’s fine and long, have burned through four bottles of the Redken Extreme Length Shampoo without a single complaint. Nobody in my house agrees on anything involving hair. This shampoo is the exception.
I do my hair. I do keratin. This one didn’t fight any of it, because it’s pH balanced and it’s a gentle gel rather than a stripping wash. A little bit goes on wet hair and it’s really foamy right away, more lather than I expected from something marketed as gentle. It smells delicious. And your hair is gonna be so soft after.
Where This Extreme Length Shampoo Doesn’t Fit
It’s built for hair that breaks, not hair that’s greasy. The whole formula, biotin plus castor oil plus the 1% Length Care Complex, is aimed at fortifying lengths so they survive long enough to get long. Redken lists it for normal and damaged hair, fragile and breakage-prone. If your problem is a heavy, oily scalp that needs a clarifying reset every week, this gel is going to feel too kind to you.
Same with color. The split-end number Redken quotes, 92% visible reduction, comes from the full system of shampoo plus conditioner plus leave-in. One bottle on its own is doing a share of that work, not all of it. Worth knowing before you expect the headline result from a single purchase.
What You’re Paying For Versus the Drugstore Aisle
The lather is aggressive enough that a palmful is genuinely too much, which sounds like a complaint but is actually why four bottles have stretched across three people’s wash days without disappearing in a few weeks. Salon pricing stings less when you’re using a third of what you’d squeeze out of a drugstore buy.
The price moves on this one, a lot. It’s sitting right around its normal three-month level as I write this, and it’s been well under that at points. So check the live price rather than assuming today is the day. It’s ranked around #2,000 in Beauty & Personal Care with more than 10,000 bought in the past month, which tells you the repurchase crowd is real and not just me restocking.
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The Running Cost Nobody Budgets For
The shampoo is the cheap part of this system. Redken sells four pieces in the Extreme Length family: the shampoo, the matching extreme length conditioner, a weekly Triple Action Treatment mask, and a leave-in. The conditioner is the one I’d call non-optional, because the lightweight cream is what carries the split-end claim alongside the wash.
The mask is weekly, so it lasts. The leave-in is a wash-day product, so it burns at roughly shampoo pace. If you run the full system for a whole household the way we do, you’re restocking two bottles at a time, not one. Store it like any gel shampoo, cap closed, out of a hot windowsill, and it behaves.
It Foams Fast, Too Fast, Sometimes
The lather is the one thing I’d warn you about. It’s really foamy from a small amount, which sounds like a compliment until you’ve poured a normal palmful out of habit and spent an extra rinse cycle getting it out. You just add a little bit to your hair. Less than you think. That’s a learning curve of exactly one shower, but it’s a real one, and with three of us on the same bottle it’s also how a bottle disappears faster than it should.
Would I Buy the Fifth Bottle? Already Planning To
My husband grabs whatever’s in the shower. My daughter’s hair is fine and tangles fast. Mine is keratin-treated and particular. None of us have switched shampoos mid-bottle, not once across four of them, which is the most persuasive data point I have.
So what you’re getting is a biotin wash that doesn’t strip, works across all hair types, smells good enough that it doesn’t feel like a treatment, and leaves hair soft without a heavy coating. What you’re not getting is a miracle growth serum. It’s strength for length retention, which is a different promise, and a more believable one. If breakage is the reason your hair stalls at the same length every year, this is an easy one to try at the current price.
Frequently Asked Questions
Is it safe on keratin-treated or color-treated hair?
Yes on keratin, that’s exactly how I use it. It’s pH balanced and formulated for all hair types and textures, so it cleanses without the stripping feeling that undoes a treatment. If you’ve just had something done, give it the salon’s usual 48-hour wait before any wash.
How long before you see a difference?
Softness is immediate, length is not. The softness shows up the first wash. The breakage and split-end benefits are cumulative across wash days, so judge it over a bottle rather than a weekend, and expect the full claimed numbers only if you’re running the conditioner with it.
Can kids use it?
I use it for my daughter, so yes in my house. It’s a gentle gel rather than a harsh clarifying formula, which is why I was comfortable with it. It isn’t a tear-free baby shampoo though, so it’s not what I’d reach for with a toddler in the bath.
Do you need the whole Extreme Length system or just the shampoo?
Shampoo and conditioner at minimum. Redken’s split-end results are measured on the shampoo plus conditioner plus leave-in together, so a solo bottle gets you the cleanse and the biotin but not the published numbers. The weekly mask is optional, the shampoo and conditioner do the heavy lifting.
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Redken Extreme Length Shampoo
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