Redken Extreme Length Shampoo with Biotin Review: Best Shampoo for Hair Growth?

If you are tired of watching your hair grow at a snail’s pace, it could be time to switch up your shower routine with a shampoo that delivers results you can see.

If you’re hoping for Rapunzel-esque lengths, but your hair seems to be perpetually hanging at “just past shoulders,” you’re not alone. After spending years dealing with hair that grows in sloth-like slow motion, and snaps to it at the slightest sign of damage, I’ve tried just about every product offering up the promise of long hair miracles. Which is why the new Redken Extreme Length range, and in particular the range’s biotin shampoo, which promises to bring back memories of the ultimate school hair trend, caught my eye –pro-level heritage and scientific claims? You BE the judge.

And that’s exactly what I’ll share with you in this thorough Redken Extreme Length Shampoo with Biotin review: from what’s inside the bottle and the technology behind the formula, to real users’ opinions on the product (including mine) and whether it’s worth the extra step in your hair growth journey. We’ll look into whether it  stands out in the crowded hair growth industry, or is it just another gorgeous bottle with big claims?

Did You Know?

Biotin (Vitamin B7) is crucial for the promotion of healthy hair, increasing the production of keratin, and supporting hair strength. If there is a lack, hair thins.

Also Read: BondiBoost HG Shampoo Review: Does This Hair Growth Shampoo Really Work?

At a Glance: What You Need to Know

A Closer Look: Redken Extreme Length Shampoo with Biotin

Redken Extreme Length Shampoo with Biotin is a hair care product that has become very popular for helping to fortify damaged hair and is believed to help hair grow longer and healthier.

Here is an explanation of what it is and what it hopes to accomplish:

• Made with Biotin: Biotin is a B vitamin known to support healthy hair growth. The shampoo intends to use this ingredient to strengthen hair from root to tip.
• Minimizes Breakage: One of the main aims of this shampoo is to minimize hair breakage. It prevents the strands from breaking by making the hair stronger, so hair can grow longer.
• Promoting Length: The formula helps prevent breakage and strengthens hair to promote your longest and healthiest hair; struck through to promote its best length with our nourishing system.
• Split End Reduction: The formula makes hair more resistant to damage, so you won’t have to worry about new split ends forming, further reducing the appearance of already damaged hair.
• For All Hair Types: It’s best for damaged hair or for those who are trying to grow their hair, but in all cases, it works and is safe for all hair types and textures.

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Key Ingredients and Their Functions

Knowing what’s in your shampoo is a non-negotiable step toward determining whether it works. Here’s what to know about what’s in Redken Extreme Length:

• Biotin (Vitamin B7): The star of the show. It reinforces hair, enhances elasticity, and promotes overall growth.
• Citric Acid: Aids in balancing pH and promotes scalp clarity.
• Hydrolyzed Soy Protein: Seeps into your hair shaft to effectively repair damage.
• Niacinamide: Encourages a healthy scalp and may help hair density.
• Sodium Laureth Sulfate: Though not sulfate-free, this cleanser makes for a great deep clean, especially on oily scalps. It’s not entirely natural or completely sulfate free, but the mixture is designed to achieve a sweet spot between strength and gentleness.

First Look: My Thoughts on the Packaging

Opening the smooth navy blue bottle, different from Redken’s signature orange containers, I was impressed. The pump nozzle is also mess-free and super convenient for use in the shower, a detail I particularly like in more expensive haircare. The bottle is weighty without being too heavy, and we love how the labeling prominently displays that this is both a biotin-packed formula on the front of the pack and length-focused on the back.

One drawback is that the packaging isn’t especially innovative or eco-­friendly — it’s run-of-the-mill plastic without any reference to post-consumer recycled material. For a luxury-priced good in 2024, I would have expected to see greater attention paid to sustainable packaging.

Who Should Try This Shampoo?

If you belong to one of the following groups, you’ll probably fall in love with this shampoo:

• You’re trying to grow out a haircut and would like longer hair faster.
• You don’t have strands that are prone to breakage, weak, or damaged.
• You use heat styling or chemical treatments frequently.
• You’re in the market for a salon-worthy shampoo with biotin.
• You’re okay with using a sulfate formula for a deep clean.
• For those who have curly, coily, or very dry hair, you might want to finish up with a very moisturizing conditioner or deep treatment.

How I Use It for Best Results

For best results with Redken Extreme Length Shampoo:

• Wet hair thoroughly with lukewarm water
• Apply a quarter-sized amount or adjust for hair length and thickness
• Massage gently into the scalp and distribute through the lengths
• Leave on for 1-2 minutes to allow biotin to work
• Rinse completely and follow with matching conditioner
• Use 2-3 times weekly as part of a hair growth routine

Pair It With

For best result, pair it with Redken Extreme Length Conditioner with Biotin and Redken Extreme Length Leave-In Treatment.

User Reviews: What People Are Saying

All in all, consumers seem extremely satisfied with Redken Extreme Length Shampoo with Biotin. Many users report:

• Less Breakage: Many users report less breakage and hair shedding with resulted in fuller hair.
• Softer, Shinier Hair: People love how smooth, soft, and shiny their hair is after using the shampoo.
• Nice Smell: The smell is said to be clean and fresh, not too strong.
• Healthier Hair: A lot of people have reported stronger, healthier hair as a result.
• Visible length increased: Results may vary, but many users notice that their hair has grown and it’s more possible for them to have longer hair compared to before.

Yet while daily washing is recommended by some users, particularly those with very fine hair, others counsel against it. Some sporadic negative reviews mention scalp sensitivity or more hair fall, but these appear to be outliers. Keep in mind, results vary for individuals.

Editor’s Note: My Skin Type & Experience

My hair is shoulder length, color-treated, and prone to breakage — especially at the ends. After using Redken’s Extreme Length Shampoo with Biotin for four weeks, I found less hair fall-out in the shower and silkier, smoother strands post-shower. My hair already felt healthier and looked noticeably stronger. Growth-wise? I also found that my roots looked fuller and shinier.

How It Stacks Up Against Other Shampoos

Redken Extreme Length compared to other popular hair growth shampoos in the following features:

Mini Shampoo Face-Off

For deep strengthening and growth, Redken Extreme Length Shampoo with Biotin wins on performance and ingredient quality. But if you prefer a sulfate-free shampoo with biotin, OGX is a more budget-friendly alternative.

Pros and Cons

Final Thoughts: Is It Worth Adding to Your Routine?

If you’re on a committed quest to have your hair grow longer, stronger, and healthier, Redken Extreme Length Shampoo with Biotin might be just what you’re looking for.

It’s not the least expensive shampoo, but its biotin-rich formula, strengthening proteins, and proven results make it a good value. That’s especially helpful if you use heat tools or have chemically treated hair that’s prone to snapping or breaking.

You might not wake up with hair down to your toes, but with regular use, you’ll soon notice you’re growing longer, stronger hair in as little as 4–6 weeks.

So if you’re tired of seeing your hair break away without any signs of it growing, this Redken shampoo for hair growth might just be the answer you’re looking for.

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