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Availability:
In Stock.
Arrives
Thursday, Oct 22
Recently Viewed
Color: 1 Month Supply | Trial Size
Style: System 4 | Colored Hair, Progressed Thinning
Features
- 85% of consumers noticed a thickening effect, 80% noticed an increase in hair density, 80% noticed an increase in hair fullness
- Thickens the hair: Nioxin System Kit 4 is clinically designed to add thickness and fullness to dry, damaged, color-treated hair with progressed thinning, with visible results in just 30 days.
- Supports scalp health: The advanced formula of Nioxin System Kit 4 gently cleanses the scalp, removing impurities and excess sebum that can clog hair follicles, creating a healthier environment for the scalp.
- Reduces hair thinning: By strengthening hair resilience, Nioxin System Kit 2 helps minimize hair breakage, promoting the appearance of fuller, thicker hair while protecting the hair color.
- Nourishes the scalp: Infused with nourishing botanicals, antioxidants, and UV protecting ingredients, this kit's Scalp + Hair Thickening Treatment can nourish and revitalize the scalp, improving its overall health and condition.
Description
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Product Dimensions : 4.33 x 2.17 x 7.28 inches; 14.1 ounces
Item model number : 99240009086
Manufacturer : Nioxin
Best Sellers Rank: #2,558 in Beauty & Personal Care (See Top 100 in Beauty & Personal Care) #29 in Shampoo & Conditioner Sets
#29 in Shampoo & Conditioner Sets:
Customer Reviews: 4.2 4.2 out of 5 stars (3,963)
Brand Name: NIOXIN
Age Range Description: Adult
Manufacturer: Nioxin
Model Number: 99240009086
Manufacturer Part Number: 99240009086
Scent Name: Unscented
Item Form: Lotion
Active Ingredients: salicylic_acid
Hair Type: thinning
Item Weight: 14.1 ounces
Number of Items: 1
Item Volume: 11.83 fluid ounces
Unit Count: 1 Count
Material Type Free: Dye Free
Recommended Uses For Product: Professional Salon & Spa
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Oct 22
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Similar Products
Top Amazon Reviews
Color: 1 Month Supply | Trial Size
Style: System 4 | Colored Hair, Progressed Thin...
I started this pack six weeks ago, and I did see a difference in one month. I'm on a Glp and all my white hair fell out, now I'm getting my Rogue stripes back at my temples, which I always liked. You do have to use it regularly. I also use the Nioxin ultimate hair fall defense serum, been using it for months. That's where I learned I had to use it regularly. It also was why I wanted to try the shampoo and cream rinse. I love the hair thickening foam, gives my hair body and volume. I've tried other products but they did not work or help. I highly recommend. Plus it's not the most expensive on the market. Goodluck friends!
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Reviewed in the United States on August 19, 2026 by Lynn
Color: 1 Month Supply | Trial Size
Style: System 4 | Colored Hair, Progressed Thin...
I was really hesitant to buy this because it's pricey, but I think its safe to say I won't be going back to any other shampoo/conditioner/product now. I'm on day 7. I wash and condition my hair daily (yeah I know, not supposed to. But my hair is oily AND dry. Worst combo ever.) I was blessed with my dads super fine, thin hair and it's only been getting thinner especially after having my first baby. I was feeling pretty down about it until I gave this system a shot. I bought the system 4 because my hair is also dry/damaged. Admittedly it did not work wonders after the first wash. I didn't even really notice any improvement until the 6th wash..and now on day 7 I'm like holy smokes.. idk how it works but it does. My hair is visibly thicker and feels thicker/heavier. I wash my hair normally, paying close attention to the scalp. Then condition and also scrub that into the scalp. The tingly sensation is amazing. Then towel dry, apply the foam to the roots and also scrub that into the scalp. Blow dry and apply some volumizing powder about midway down (my hair is slightly past my shoulders). I do this for some added texture because my hair has almost no texture at all. Pretty easy process..worth the money. I'll be buying the full sized products next.
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Reviewed in the United States on March 14, 2024 by Danielle Adelé
Color: 1 Month Supply | Trial Size
Style: System 4 | Colored Hair, Progressed Thin...
Let me preface my review by saying that I haven't used the Nioxin System 4:long enough to comment on growth results, but I want to comment what I have experience with this product within the first two weeks of usage. Hair Type and Texture: -Relaxed and colored afro-textured hair. Hair Issues: Dryness, breakage and thinning. Product con: Small amount of product for the price, particularly the foam. I don't know how long that small can will last given that you have to use it three times a week to get results. Product pro: Despite the bottles only being 5 oz, this is the highest quality, most concentrated shampoo I have ever bought. The bottle may be tiny but the shampoo is so concentrated that it only takes a pea-sized or even less to fully lather and cleanse the hair. Because the shampoo is so concentrated, if you take your time to lather, rub the shampoo down the hair shaft and scrub your scalp, there is no need to rinse and repeat. The peppermint smells great and feels amazing when it tingles on the scalp. The first time I used the shampoo, my hair felt soft immediately. Same thing after I used the conditioner. Because my hair is very coarse and sometimes feels hard, my hair felt so much softer after using the shampoo. Today was my second wash. And while I still have experienced shedding, my hair is not breaking as much. I did a major chop on my hair today. (2/2/2025) to get rid of the damaged hair and pretty much start over. I washed my hair with the nioxin before getting my haircut and my hair feel so much better and softer. I also noticed much less breaking as I combed through my hair. I will do an update to see if this product helps with the growth and thinning, but so far I'm loving the quality and how it has made my hair feel. You really do feel a difference in your hair the very first time you use it.
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Reviewed in the United States on February 3, 2025 by T. Brown
Color: 1 Month Supply | Trial Size
Style: System 4 | Colored Hair, Progressed Thin...
This works! I realize my hair was thinning at my hairline and it was also thinning at my part. I ordered this, as well as Nature's Bounty hair skin nails capsules. I am so happy to say that I have baby spiky hairs growing where i had lost hair. This stuff absolutely works. I I would highly recommend this. Because I have dyed hair (black) , I purchased the one safe for dye hair. However, one thing I will say though, is the foam that you put at your scalp aside from the shampoo and conditioner, it does fade the dye at the roots. So my hair tends to turn a little brown where I put the product. Not a big deal considering what it's doing. I ordered on May 15th, it is now July 23rd and I have about 1.5cm of new growth.
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Reviewed in the United States on July 24, 2026 by Jessica Carson
Color: 1 Month Supply | Trial Size
Style: System 4 | Colored Hair, Progressed Thin...
Zero stars. My hair was exactly where I wanted it to be for the first time in my life. Both in length and thickness. I thought using this product would help keep it there. I assumed I was being proactive to protect what finally grew in and became healthy. During the first wash I noticed excessive shedding. I thought maybe it’s my hormones. By second wash I could visibly see the effects of the excessive shedding both in and out of the shower. I was losing full strands from the root in clumps. I could see my scalp as if there was baldness occurring and I no longer had any baby hairs to brush down on sides of my head. That was a huge tell for me as I have to brush them down daily and enjoy doing so. Someone else even noticed and told me I should use something to regrow my hair along hairline for where they could see it had thinned out (not knowing that just two weeks prior I didn’t have this issue-this was result of the product). I have since read many comments on multiple forums stating this product causes shedding to “cleanse scalp” or “create a healthy environment for hair growth.” If you have hair on your scalp and want to keep it there, I DO NOT recommend this product. If you are patchy and the risks of losing hair to then wait to grow it back all over again seems worth it to you, choose wisely. I can’t believe I now have to wait for my hair to grow back all over again. It’s truly disheartening for me as this has been YEARS long journey to finally feel confident with health of my hair just to be worse off than I ever was when it felt to be at its worst. I have never experienced this amount of shedding and loss, not even when the dermatologist was startled at the pictures I showed her of shedding on wash days. This product caused much worse. Even after only using it twice, the shedding continued to the point I was worried to wash it and lose more when hair was wet since shedding continued when hair was dry. It also has dried out my hair completely to the point that it sounds crunchy. My curly hair was finally long and healthy for the first time ever, and now I’m starting from scratch due to this product. I will never use this product again nor will I ever recommend it to anyone.
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Reviewed in the United States on March 22, 2026 by EverEvolving
Color: 1 Month Supply | Trial Size
Style: System 4 | Colored Hair, Progressed Thin...
I like this hair combo product. The only complaint and the reason for 4 stars instead of 5 is that the foam, which is the main hair growth part, is not enough and doesn't last as long as the shampoo and conditioner do. I recommend doing a test before using it on your scalp. As it is mentioned in the product description and direction, the ingredients in the foam can cause a burning sensation and you skin can become red. For me it lasted about a few minutes the first time I used it and as I used it more the less the side effects got. The overall quality of my hair also increased. I just wished they had a bigger size foam.
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Reviewed in the United States on May 18, 2025 by Mira Y
Color: 1 Month Supply | Trial Size
Style: System 4 | Colored Hair, Progressed Thin...
In 1989, I first used Nioxin system 2C. My hairdresser said, this stuff will blow up because it WORKS. I have used it all my life. I was 20 in 1989, and very much had hair. I'm now 56, post menopause and thinning due to tossing hair in bun for two yrs. The crown and hormones and eating wrong, made me sick. I use a topical 5% foam from another business and this system 3 for hair thinning. We shall see. This shampoo tho!! Works, feels good, tingles, and smells amazeballs!!! I apply from ears down the conditioner. Light on scalp, use a wide tooth comb I got on here, wood and made in Italy, and the results are beautiful. I'll buy bigger next time.
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Reviewed in the United States on July 13, 2026 by Logical One
Color: 1 Month Supply | Trial Size
Style: System 4 | Colored Hair, Progressed Thin...
Ok so I have to do this review bc it works! I've been battling hair thinning and ive tried a lot of products both topically and orally ...this is it...after one wash i saw my hair more lively and vibrant and shiny just after one use...not sure how it will hold up as far as making my hair thicker but I can already tell its making my hair stronger as well lively, so very impressed had to share So I had to come back and add pics bc it works and the pic says it all!! As u can see on the left is before I started using it and the second one is after only two times of using the shampoo and conditioner and I have used the mousse once which is in second pic! I washed my hair the same day these were taken and the left was from valentines day and the right one is from a day ago. As u can see the volume is undeniable!!! And let me also add that i tease my hair for volume purposes which I did one the left but I didnt even have to with this stuff, this is carzy! I have spent so much money on different products and to think I haven't tried this sooner, well im kicking myself in the butt!!
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Reviewed in the United States on February 24, 2026 by Bella baker