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Nioxin ProfessionalScalp and Hair Thickening System 4 Leave on Treatment
We are Nioxin, the #1 Professional brand for thicker, fuller hair. We are pioneers of a hair movement that's never going to stop. We believe everyone should experience the uplift that comes from having hair that looks and feels the way they actually want it to: Thicker. Fuller. Healthier.
Built on a legacy of clinically proven solutions, we turn scalp science into true scalp care and hair thickening products. The kind of products with proven results. Because everyone, yes everyone, deserves to grow thicker, fuller hair they can see and feel. Nioxin Grows Results(TM).
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 minimise 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 revitalise the scalp, improving its overall health and condition.
Built on a legacy of clinically proven solutions, we turn scalp science into true scalp care and hair thickening products. The kind of products with proven results. Because everyone, yes everyone, deserves to grow thicker, fuller hair they can see and feel. Nioxin Grows Results(TM).
Directions
Apply the Scalp + Hair Thickening Treatment directly to the scalp. Shake it well before applying directly to the entire scalp. Gently massage it in. Do not rinse.
Test results
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 minimise 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 revitalise the scalp, improving its overall health and condition.
Ingredients
Aqua/Water/Eau, Niacinamide, Phenylbenzimidazole Sulfonic Acid, Caffeine, Polysorbate 20, Benzophenone-4, Phenoxyethanol, Sodium Benzoate, PEG-12 Dimethicone,
Benzyl Alcohol, Sodium Hydroxide, Cocamidopropyl Betaine, Acetamide MEA, Tetrasodium EDTA, Propylene Glycol, Methyl Nicotinate, Mentha Arvensis Leaf Oil,
Parfum/Fragrance, Polysorbate 80, Polysorbate 60, PEG-23M, Mentha Piperita (Peppermint) Oil, Limonene, Camellia Sinensis Leaf Extract, Cystine Bis-PG-Propyl
Silanetriol, Lecithin, Tocopheryl Acetate, Biotin, Foeniculum Vulgare (Fennel) Fruit Extract, Silica, Citrus Limon (Lemon) Peel Extract, Saccharum Officinarum/Sugar Cane
Extract/Extrait de canne à sucre, Acer Saccharum (Sugar Maple) Extract, Vaccinium Myrtillus Leaf Extract, Citric Acid, Faex Extract/Yeast Extract/Extrait de levure,
Propylparaben, Citrus Aurantium Dulcis (Orange) Fruit Extract, Maltodextrin, Methylparaben, Potassium Sorbate, Ethylparaben, Butylparaben, BHT.
This list of ingredients may be subject to change, please consult the packaging of the product purchased.
+Offer
FREE Instant Fullness 65ml, when you buy two NIOXIN products.*
*One free gift per order. Valid until the 23rd of February or whilst stock lasts. Simply add two NIOXIN products to your shopping bag and choose your gift on the order summary page. Choice of gift may change without notice. Cannot be used in conjunction with any other Promotion and this offer is not applicable to previously made or pending purchases.
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Rated 5 out of
5
by
daddydarren_6283 from
Bounce
[This review was collected as part of a promotion.] My hair after using it for a month seemed thicker and more full. Not sure if it helped the grey hair or not. But it feels different. Having the three products I think has made a difference.
Date published: 2025-10-23
Rated 5 out of
5
by
dawnieg78_1782 from
Hair serum
[This review was collected as part of a promotion.] I now love using these products, they was given to me as part of a review package and I have to say I'm impressed with the serum that I never used before
Date published: 2025-10-19
Rated 5 out of
5
by
28aphil_2527 from
Leaves hair thicker and stronger.
[This review was collected as part of a promotion.] I have been using the Nioxin System 2 Hair Loss Serum for Natural Hair with Progressed Thinning for around 6 weeks now, I use it 3 or 4 times a week after washing and conditioning my hair, I feel there is definitely a lot of improvement in my hair as it feels a lot thicker and I'm not noticing many bald spots anymore.
The serum is a leave-in formula that is a lightweight foam mousse, it nourishes the hair and scalp.
You just give the bottle a good shake, pump some out, the amount would depend on the amount of hair that you have, then massage the serum onto your head, there's no need to rinse it off.
It doesn't feel sticky or greasy and leaves my hair feeling thicker and smoother.
The bottle, with a pump top, is a good size, the serum lasts a long time as you don't need to use a lot for it to be effective.
Date published: 2025-10-17
Rated 5 out of
5
by
ahmetsercanc_7409 from
Noticeable fullness in thinning areas
[This review was collected as part of a promotion.] After a few uses, my hair felt thicker in areas that had thinned out. The lightweight foam absorbs easily and adds volume without residue. Easy to apply but be careful if you have eczema or scalp sensitivity.
Date published: 2025-10-14
Rated 1 out of
5
by
jermaineg5_3629 from
Wouldn't recommend
[This review was collected as part of a promotion.] Product left my hair dry and brittle with no visible new growth. Disappointed and wouldn’t recommend for thinning hair. I wouldn't purchase this product
Date published: 2025-10-13
Rated 4 out of
5
by
jamieb387_6389 from
Effective when using with shampoo & conditioner
[This review was collected as part of a promotion.] The serum is easy to use & work through my hair, and I love how quickly it absorbs. The scent is nice to use. Product so far has been pretty effective look forward to using it for a longer period of time. Was not one to use serums have just stuck to shampoo & conditioners but would definitely recommend this product
Date published: 2025-10-13
Rated 5 out of
5
by
mandeepb9_9724 from
Body, fullness hair
[This review was collected as part of a promotion.] Applying the leave-in treatment directly to the scalp is a breeze because to its frothy nature. It gives my hair a slight boost of fullness at the roots without making it oily. My hair already has more body, and my scalp feels healthier. All things considered, I'm having a great time with this method and intend to continue using it to observe the longer-term effects. I heartily recommend it if you're struggling with hair loss and want a product that promotes a healthy scalp.
Date published: 2025-10-12
Rated 5 out of
5
by
alexp362_7308 from
Great addition to my regular routine!
[This review was collected as part of a promotion.] I’ve been using the Nioxin Hair Thinning Serum as part of my daily routine, and I really like how light it feels on my scalp. The fresh, tingling sensation makes me feel like it’s doing something straight away, and it doesn’t leave any greasy residue. After a few weeks, my hair feels a bit stronger at the roots, and I’ve noticed less breakage when brushing. It’s a slow, patient process, but it’s become a simple step I look forward to because my scalp feels healthier and more refreshed overall.
Date published: 2025-10-10
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