Nioxin System 4 Therapy Conditioner - 10.1 fl oz: For All Hair Types, Hair Regrowth, Liquid Form
$26.49 ($2.62/fluid ounce)
In Stock
Free & easy returns
Return this item by mail or in store within 90 days for a full refund.
Eligible for registries and wish lists
About this item
Additional product information and recommendations
Discover more options
More to consider
Guests also viewed
Related Categories
Guests are saying
The Nioxin System 4 bundle is highly praised for its effectiveness in improving the health and appearance of colored thinning hair. Guests report noticeable improvements in hair thickness, strength, and shine within weeks of use. The shampoo gently cleanses without stripping color, while the conditioner refreshes the scalp and the serum adds fullness. The minty scent is refreshing, and the large bottle size offers great value. Overall, it is a salon-quality solution that delivers on its promises.
Summary created by AI from text of reviews reflecting recent feedback provided across different star ratings (includes incentivized reviews)
4.2 out of 5 stars with 469 reviews
effectiveness: 5 out of 5
quality: 3 out of 5
value: 5 out of 5
100% would recommend
1 recommendations
5 out of 5 stars
18 April, 2026
originally posted on influenster.com

Soft and frizz free hair
[This review was collected as part of a promotion.] This is the second step for the anti ageing system designed to maintain moisture, reduce breakage and deep hydration without feeling hair too heavy. I felt the conditioner was thick and left my hair soft and less frizzy. I liked the shine and smoothness.
5 out of 5 stars
8 April, 2026
originally posted on influenster.com

Lightweight conditioner that leaves hair healthy a
[This review was collected as part of a promotion.] Ive been using the nioxin conditioner and found it to be lightweight and nourishing when feeling my hair. It spreads easily without leaving residue. Ive noticed my hair feels softer, looks healthier and has more volume. A small amount goes a long way as well as applying consistently. Im happy with the results so far.
3 out of 5 stars
1 April, 2026
originally posted on influenster.com

Anti age hair care and Serum
[This review was collected as part of a promotion.] I'm using the range as it's a treatment. Shampoo, Conditioner, and Serum. The Conditioner feels very creamy, it coats the hair well, and it complements the shampoo. I prefer to use matching shampoo/conditioner as I feel they're designed to work better together. Just me?? The Conditioner made my hair feel quite silky when naturally air drying. Once dried and outdoors on a breezy day, I could see some curl formation too. 3B. The Conditioner alone is not rich enough to tame my frizz. I'm using thus range as my anti age scalp treatment. Less hair in the plughole 2nd wash.
5 out of 5 stars
25 March, 2026
originally posted on influenster.com

Nixon age defence collection
[This review was collected as part of a promotion.] Nixon age defence collection. I would Definitely recommend if you want to repair your old damaged hair. I tried for a week i love the fragrance it smells absolutely devine. My hair felt smoother and more moisturised helps to cover my grey hair. My hair is fuller less dull feels more alive. My hair has more volume, and more manageable
5 out of 5 stars
24 March, 2026
originally posted on influenster.com

Great packaging!
[This review was collected as part of a promotion.] If you struggle with dull and thinning hair you get older like me, then this is a great conditioner for you! I got the whole age defence set and I am absolutely blown away with my results, my hair looks fuller and healthier. The conditioner smells amazing and the packaging is great.
5 out of 5 stars
21 March, 2026
originally posted on influenster.com

Let's review
[This review was collected as part of a promotion.] I sue first shampoo and it make my hair soft and nice very nice so after use this make my hair more slimy beautiful plus strapping fell Relaly help My hair braise n Mabel it strong smell Nice also
5 out of 5 stars
19 March, 2026
originally posted on influenster.com

Nixon conditioner
[This review was collected as part of a promotion.] Nixon age defense conditioner for aging hair . Perfect for your scalp and smells good leaves your hair feeling and looking amazing . Packaging stands out in the shelf .
5 out of 5 stars
10 October, 2025
originally posted on influenster.com

Thicker and stronger looking hair!
[This review was collected as part of a promotion.] I’ve been using Nioxin Hair Thickening Conditioner on my thin hair, and it’s made a real difference over time. It feels refreshing on my scalp with a light tingle, and it doesn’t weigh my hair down. After a few weeks, my hair started to feel stronger and look a bit fuller, with less breakage when brushing. I also like that it leaves my hair smooth and easier to manage, even though it’s not a miracle thickener overnight—it works best as part of a consistent routine.
3 out of 5 stars
9 October, 2025
originally posted on influenster.com

Good
[This review was collected as part of a promotion.] A good conditioner that left my hair feeling great and fresh. A smooth creamy texture with a great scent. After using for several weeks I didn’t notice a difference
5 out of 5 stars
6 October, 2025
originally posted on influenster.com

Lightweight but nourishing
[This review was collected as part of a promotion.] I’ve been using the conditioner in conjunction with the shampoo and hair treatment from this Nixon line. I really appreciate the light weight conditioner, it leaves my hair feeling very nourished without feeling weighed down. The product smells great and is easy to spread through the hair.
2 out of 5 stars
5 October, 2025
originally posted on influenster.com

It didn't deliver promised results
[This review was collected as part of a promotion.] I’ve been using the Nioxin System 2 Hair Thickening regime for over a month now. I have followed the instructions but unfortunately I haven’t noticed any improvement in my hair thickness or volume. I’ve started experiencing more itchiness on the day after use in random parts of my scalp, which wasn’t an issue before. The conditioner(same as the whole regime) has a refreshing smell and desired consistency, it's very easy to use and it doesn't make my hair greasy, however for me personally, it hasn’t delivered the promised results.
5 out of 5 stars
2 October, 2025
originally posted on influenster.com

Unreal
[This review was collected as part of a promotion.] The huge bottles are absolute value for money, since using the product my hair has felt thicker and stronger only using twice a week. It does smell quite medicinal but does do what it says on the bottle. 100% feels like my hair is getting thicker by using.
5 out of 5 stars
2 October, 2025
originally posted on influenster.com

Not too heavy on hair
[This review was collected as part of a promotion.] Shampoo & Conditioner: I really like these. They leave my hair feeling fresh, clean, and light without any heavy residue. The scent is mild and not overpowering, which I appreciate since I don’t like strong fragrances in hair products. After washing, my scalp feels refreshed and my hair looks healthier and fuller.
5 out of 5 stars
1 September, 2025
originally posted on influenster.com

Smells lovely!
[This review was collected as part of a promotion.] Nice conditioner, it’s got a lovely minty smell and has left my curly hair lovely and soft after I’ve used it. It comes in a nice big bottle which I like as it makes it more cost effective. Recommended
5 out of 5 stars
20 August, 2025
originally posted on influenster.com

Great system.
[This review was collected as part of a promotion.] I started using the Nioxin System 4 bundle for my coloured, thinning hair and noticed a difference within weeks. The shampoo cleans gently without stripping colour, the conditioner leaves my scalp refreshed, and the serum adds a healthy fullness. My hair feels stronger, looks thicker, and has a lovely shine. It’s a salon-quality solution that really delivers on its promise to improve scalp health and encourage thicker-looking hair. Great smell. Big bottles to last too.
4 out of 5 stars
18 August, 2025
originally posted on influenster.com

Nourishes sensitive scalp
[This review was collected as part of a promotion.] Same results as shampoo not too thick consistency, nourishes dryness after using product frequently I have found my hair looks less damaged and my scalp has really improved, only downfall would be the scent strange chemical smell
5 out of 5 stars
18 August, 2025
originally posted on influenster.com

Impressed!
[This review was collected as part of a promotion.] I am amazed by this product, I was very impressed by the size of the bottle, and after multiple uses, I am very pleased with how my hair looks and feels. It has a peppermint smell, which is very refreshing and the conditioner definitely leaves my hair smooth, silky and shiny and feeling healthier. Combined with the other two products from the range, my hair has had a complete overhaul!
4 out of 5 stars
17 August, 2025
originally posted on influenster.com

Minty fresh conditioner and makes hair sooth.
[This review was collected as part of a promotion.] A minty fresh smell. Seems hair looks a bit thicker. Was amazed at the way this worked on my dandruff and kept my hair looking less greasy over a week. Unfortunately, it will run out of conditioner much quicker than the shampoo.
5 out of 5 stars
13 August, 2025
originally posted on influenster.com

Game changer
[This review was collected as part of a promotion.] I’ve been using the Nioxin System 4 Hair Thickening Conditioner for a while now, and I’m seriously impressed. First off, a little goes a long way — even with my long, constantly bleached hair, I barely need any to coat everything. The minty scent is refreshing without being overpowering, and I love that it leaves my scalp feeling clean and invigorated. I have blue hair, and one of my biggest concerns with any conditioner is colour stripping — this one doesn’t budge the colour at all. In fact, it makes my hair feel healthier and softer while also keeping it looking fresh for longer. I’ve noticed my hair gets less greasy between washes, which is a big bonus for me. Because my hair has been through a lot of bleaching, breakage is always a problem, but this conditioner has really helped strengthen and protect it. After regular use, I can see and feel the difference in the texture and resilience. It’s absolutely worth the money — I’ve been using it consistently and still haven’t even made it through a quarter of the bottle. Definitely a game-changer in my hair routine.
4 out of 5 stars
13 August, 2025
originally posted on influenster.com

Conditions well without hair being flyaway.
[This review was collected as part of a promotion.] Good conditioner, not too heavy. Would have liked more scent. Overall this left hair feeling light and silky without feeling fine and flyaway.