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Nioxin

Hair Thickening Gel

Styler / Gel, medium-hold

  • Styler
  • gel
  • Sulfate-free
  • Protein-free
  • Not cruelty-free · PETA-listed
Size5.1 fl oz
Price$16–19commonly seen · 5.1 oz
Price / oz$3.23/ozat 5.1 oz

Scent:

No added fragrance on the label, but it carries scenting botanicals — essential oils smell even when they are not labelled as fragrance.

Manufacturer page: nioxin.com

Personal fit

Is this right for you?

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Upper-mid price for a gel

$3.23/oz at 5.1 oz — more than 69% of the 155 gels , which mostly run $1.19–3.51/oz. The cost less.

Price and stores

Great for

no fragrance (parfum) on the label — scented
Protein-sensitive hairthat stiffens when protein is added
Curl definitionfilm formers hold a clump together
Fine hairthat flattens under most products
Soft-hold stylesthat should stay touchable
Very dry hairno fast-drying alcohol in the list

Maybe skip if

this product carries a scent
Curly-method routinesthese silicones need a detergent to remove
Anyone who dislikes a castthe film formers here can set firm
Dry or very humid airwhere heavy humectants work against you
Vegan and cruelty-freeour record does not support both claims here

Whether this hold level is right for you depends on your density, porosity, and how long your style has to last — that is what the consultation works out.

What the formula actually does

Read from the label, not the marketing

Each row says where it comes from: F means we derived it from this product’s own ingredient list, S means it is a claim the brand makes that the formula neither confirms nor contradicts.

Hold (as stated) Medium

A medium hold, as stated by the brand.

Hold system Synthetic polymer

Synthetic hold polymers — the firmest of the hold systems.

Cast risk Likely

Film formers without much softening them — expect a cast to scrunch out.

Weight on the hair Light

Water-first and light: unlikely to flatten fine hair.

Oil absorption None

No absorbent powders or starches.

Oils and butters None

No oils or butters in the list.

Fast-drying alcohol None

No fast-drying alcohol in the list.

Needs detergent to remove Yes

Water-insoluble silicones or waxes: a detergent wash is what removes them.

Fragrance None listed

No fragrance is listed.

from the formula stated by the brand reported by reviewers Scale: 1 dot low · 5 dots high, within this product type.

Ingredients that matter

The ingredients that change a decision

The workhorse ingredients plus anything lower down that changes a decision. These chips name what an ingredient does — they are not safety scores, and no ingredient here is rated good or bad on its own.

IngredientWhat it doesWhy it mattersChip
WaterAqua/Water solvent The base everything else is dissolved in Neutral
Sorbitol humectant Pulls water into the hair Moisturizes
Glycerin humectant Pulls water into the hair Moisturizes
Aminomethyl Propanol pH adjuster Fine-tunes the pH pH balancer
Carbomer thickener Adjusts the texture Holds
Octylacrylamide/Acrylates/Butylaminoethyl Methacrylate Copolymer film former A supporting film former Holds
Phenoxyethanol preservative Keeps the product from spoiling Stabilizes
Panthenol humectant Adds a little water-binding Detangles
Amodimethicone silicone A little smoothing and shine Buildup
Mentha Arvensis Leaf Oil fragrance The scent Fragrance
Mentha Piperita (Peppermint) OilMentha Piperita Oil botanical extract A trace plant extract Fragrance
Linalool fragrance The scent Fragrance
What the list leaves out, and what it carriesNo sulfates, drying alcohols, or fragrance. Protein-free: this is built for moisture rather than for strengthening. The silicones here need a detergent wash to come off.
Full ingredient list (13)

US labelling rules put ingredients above 1% in descending order of amount; below 1% they may be listed in any order. Annotations keep three readings separate: the ingredient's general function, its role in this product type, and what its position can support.

  • 1 Water · Aqua/Water
    General function

    The base of almost every rinse-off and cream hair product. It carries everything else and is normally the first ingredient on the label.

    Leading ingredient

    Listed in the first three ingredients, it is likely a structural part of this formula.

    • solvent
  • 2 Sorbitol
    General function

    A sugar-based humectant that adds moisture and a slight cushiony feel.

    Leading ingredient

    Listed in the first three ingredients, it is likely a structural part of this formula.

    May suitDry, coarse, or high-porosity hair

    High-porosity hair loses water fast; a humectant holds some of it in place for longer than the wash itself would.

    May suitVery dry or highly damaged hair

    Binds water into the outer layers of the strand, and water is what makes dry hair flexible again rather than brittle.

    DependsClimate-sensitive or frizz-prone hair

    A humectant moves water in whichever direction the air allows: it holds moisture in humid conditions and can pull it back out of hair in very dry ones.

    PubChem
    • humectant
  • 3 Glycerin
    General function

    A small water-loving molecule that draws moisture into the hair and holds it there. It is the most common softening ingredient in conditioners and leave-ins.

    Role in this product type

    In styling gel, glycerin helps retain moisture as the product dries, supporting a softer, more flexible finish. The hold itself comes from the formula's film-forming polymers.

    Leading ingredient

    Listed in the first three ingredients, it is likely a structural part of this formula.

    May suitDry, coarse, or high-porosity hair

    May suit hair that benefits from added water retention and a softer, more flexible gel finish.

    May suitVery dry or highly damaged hair

    Binds water into the outer layers of the strand, and water is what makes dry hair flexible again rather than brittle.

    DependsClimate-sensitive or frizz-prone hair

    Consider the climate and the complete formula: prominent humectants can behave differently in very dry air and on frizz-prone hair in high humidity.

    Cosmetic Ingredient Review
    • humectant
  • Below about this point, order stops being meaningful — these are typically used at 1% or less.
  • 4 Aminomethyl Propanol
    General function

    A base used in trace amounts to neutralise acidic hold polymers so they thicken and set properly.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

    DependsFrizz-prone, damaged, or high-friction hair

    pH adjusters are how a formula is brought to a chosen acidity, and an acidic formula keeps the cuticle lying flatter than an alkaline one. Which way this one moves the pH depends on the formula, and the finished pH is not on the label.

    PubChem
    • pH adjuster
  • 5 Carbomer
    General function

    A thickener that turns a liquid into a clear gel. It also contributes a light hold.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

    May suitClimate-sensitive or frizz-prone hair

    A set polymer film is a physical barrier to humidity, so a style keeps its shape longer in damp conditions.

    May suitMaximum-hold styling

    Synthetic film formers dry into a continuous film, which is what holds a shape against movement and against humid air.

    DependsBuild-up-sensitive routines

    Some acrylate copolymers rinse with water and some need a detergent; the label alone does not say which one a formula used.

    • thickener
    • polymer
    • film former
  • 6 Octylacrylamide/Acrylates/Butylaminoethyl Methacrylate Copolymer
    General function

    A firm hold polymer used in hairsprays and gels. It holds well in humidity and brushes out.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

    May suitClimate-sensitive or frizz-prone hair

    A set polymer film is a physical barrier to humidity, so a style keeps its shape longer in damp conditions.

    May suitMaximum-hold styling

    Synthetic film formers dry into a continuous film, which is what holds a shape against movement and against humid air.

    DependsBuild-up-sensitive routines

    Some acrylate copolymers rinse with water and some need a detergent; the label alone does not say which one a formula used.

    • film former
    • polymer
  • 7 Phenoxyethanol
    General function

    The most common modern preservative; it keeps the product free of bacteria and mould. It sits well below 1% of the formula.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

    PubChem
    • preservative
  • 8 Panthenol
    General function

    Provitamin B5. It draws in water and penetrates the strand a little, which is why it is the standard ingredient for softness and shine claims.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

    May suitFine or easily flattened hair

    It hydrates without adding oil or a film, which is the combination fine hair usually needs.

    May suitFrizz-prone, damaged, or high-friction hair

    Deposits a lubricating layer that makes combing easier, which is most of what stops mechanical damage adding to frizz.

    May suitVery dry or highly damaged hair

    A humectant that also penetrates the cuticle, so it holds water inside the strand rather than only on the surface.

    PubChem
    • humectant
    • conditioning agent
    • vitamin
  • 9 Amodimethicone
    General function

    A silicone modified to stick where hair is damaged, so it smooths selectively instead of coating everything. It resists rinsing more than plain dimethicone.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

    May suitClimate-sensitive or frizz-prone hair

    A surface film slows how quickly humidity reaches the cortex, which is what limits swelling-driven frizz in damp air.

    May suitFrizz-prone, damaged, or high-friction hair

    Amino-functional silicone carries a positive charge, so it binds where the cuticle is worn rather than coating evenly. Damaged areas get most of it.

    May suitMaximum-hold styling

    Film formers are what hold a style: they dry into a connected film across the strands so the shape resists movement.

    International Journal of Trichology
    • silicone
    • conditioning agent
    • film former
  • 10 Mentha Arvensis Leaf Oil
    General function

    Cornmint oil, used for a cooling sensation and mint scent.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

    May not suitFragrance-sensitive routines

    Declared fragrance. On a fragrance-sensitive routine this is the line that decides it, wherever it sits on the label.

    • fragrance
    • botanical extract
  • 11 Mentha Piperita (Peppermint) Oil · Mentha Piperita Oil
    General function

    Peppermint essential oil, used for scent and the cooling feeling on the scalp.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

    May not suitFragrance-sensitive routines

    Essential oils are fragrance. Several carry constituents on the EU list of declared fragrance allergens, so a label with no fragrance line can still be a scented product.

    • botanical extract
    • essential oil
    • fragrance
  • 12 Linalool
    General function

    A floral fragrance component listed separately as a recognised contact allergen.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

    May not suitFragrance-sensitive routines

    One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.

    PubChem
    • fragrance
    • named fragrance allergen
  • 13 Limonene
    General function

    A citrus-smelling fragrance component that EU rules require to be named separately because some people react to it.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

    May not suitFragrance-sensitive routines

    One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.

    PubChem
    • fragrance
    • named fragrance allergen

What the whole list adds up to

  • 4 fragrances
  • 3 humectants
  • 3 film formers
  • 2 polymers
  • 2 conditioning agents
  • 2 botanical extracts
  • 2 named fragrance allergens
  • 1 solvent
  • 1 pH adjuster
  • 1 thickener
  • 1 preservative
  • 1 vitamin
  • 1 silicone
  • 1 essential oil

Ingredient list captured 2026-08-27. Formulas change — check the package in your hand when an ingredient matters to you.

Price · 5.1 oz

Commonly seen $16–19 Midpoint $16.49 · 3 stores · checked Sep 13
Good value under $16 Under $3.15/oz it costs less than three-quarters of the 8 products we score as doing the same job

Priced above the products that do the same job. Stores sell it above the $16 line; products that do this job typically go for about $19 at this size.

Show the price ladder
Where we’ve seen it6 listings · 5 stores

5.1 ozmost listedBest per ounce

4.73 oz

  • OneBioShop
    $39.00
    4.73 oz · $8.24/oz
    Aug 30Lowest per ozSale · was $47.00
  • Ulta
    $22.00
    Aug 25

Sorted by price per ounce. Dated observations from our research, not live prices. Direct store pages, no affiliate links. We don’t sell this product.

How we work this out
  1. 5.1 oz is the size stores list most often; every comparison on this page is made at it. Other sizes are shown in the Sizes row and the store list.
  2. Commonly seen is the middle half of current prices for the 5.1 oz at recognised stores — the cheapest quarter and the dearest quarter are left out, so one sale or one overpriced listing can’t move it.
  3. Good value under $16 comes from the 8 products we score as doing the same job as this one. A quarter of them cost less than $3.15/oz; at 5.1 oz that is $16. Under that line you are paying less than most of them.
  4. About $19 is what those same products typically cost at this size — the midpoint of their prices per ounce, scaled to 5.1 oz.

Formula

Formula score
8 of 10

The formula carries the systems a gel is built around, and it sits in the middle of the range for gels per ounce.

How the score is counted
  • 2 products we score as doing the same job cost less per ounce
  • Costs more per ounce than 69% of the 155 gels we’ve priced
  • Covers 5 of the 6 things a gel should do
  • Reviewers mention 2 things they like about how it performs
  • A hold systemThe polymer, gum, or wax that holds the shape.3 pts
  • Softeners alongside the holdWhat keeps a film flexible instead of brittle.2 pts
  • No drying alcohol in the first threeFast drying without leading on alcohol.2 pts
  • A humectantBinds water into the hair.1 pt
  • A humidity claim with a mechanismThe claim has a film former or silicone behind it.1 pt
  • Fragrance kept out of the top eightScent as a finishing touch, not a major share.1 pt

The formula score is completeness for the job: the share of the systems this product type is normally built around that we can find in this list, weighted. It is not efficacy, not quality, and it never compares across product types.

Does the same job, for less

Same derived functions — what it cleans, conditions, coats or holds — at a lower cost per ounce. Scent, texture and where you buy it can still differ.

L'Oréal ParisLowest cost per oz L'Oréal Paris Advanced Hairstyle BOOST IT Volume Inject Mousse $0.84/oz $2.39/oz less
  • Protein-free
  • Lightweight
  • Alcohol-free
· Close function
Function
  • Propellant
Also
  • Vegan
  • Drugstore tier
  • 8.3 oz bottle
Compare
MatrixClose function High Amplify Foam Volumizer Full Bodifying Mousse $2.00/oz $1.23/oz less
  • Protein-free
  • Lightweight
  • Alcohol-free
Function
  • Film formers
  • Slip and detangling
  • Propellant
Also
  • Salon tier
  • 11.3 oz bottle
Compare

See more alternatives in the product library

These are functional neighbours, not personal recommendations — they are close on formula, not chosen for anyone. Get the one that fits your hair, routine, and budget

Built for wavy to coily hair

Final decision

Should you buy it?

A solid pick for the hair it suits
Best user

People sensitive to fragrance, looking for a formula with no added fragrance and a protein-free formula

Biggest tradeoff

Worth skipping for anyone sensitive to fragrance, curly-method routines, or anyone who will not scrunch out a cast

We do not sell products or take placement fees. This page states what the formula and the prices show; the consultation is what matches it to a person.

Claims check

What the brand says, against what the formula shows

Claims are quoted from the brand. We only mark one supported, partly supported, or conflicting when the ingredient list actually speaks to it; everything else stays "stated by the brand", which is not a criticism — most claims simply cannot be read off a label.

1
SupportedBacked by ingredients
0
Partly supportedSome supporting logic
2
Stated by brandNo clear evidence
1
Potential conflictFormula works against claim
Flexible hold

Hold polymers appear without the emollients that usually keep a film from setting firm.

  • Carbomer
  • Octylacrylamide/Acrylates/Butylaminoethyl Methacrylate Copolymer
  • Amodimethicone
Potential conflict

Expect a cast you have to scrunch out.

Adds body and definition

It reads light on the strand, which is what volume claims depend on.

  • Carbomer
  • Octylacrylamide/Acrylates/Butylaminoethyl Methacrylate Copolymer
  • Amodimethicone
Supported

Leaves room for lift.

For all hair types

No formula reads the same on every texture; our fit panel is the better guide.

Stated by brand

See the fit panel instead.

Fuller-looking hair

Density and growth are cosmetic claims an ingredient list cannot settle.

  • Panthenol
  • Mentha Arvensis Leaf Oil
  • Mentha Piperita (Peppermint) Oil
Stated by brand

Not something a label can show.

How to read this

We look at the first 10–15 ingredients and what they do in a formula — not marketing. If the list doesn't speak to a claim, we don't assume.

Reviewers

What people report

Recurring themes our researchers wrote in their own words from sourced reviews. We do not store or scrape star ratings.

Wanted a hairspray/product that held side-swept bangs out of the face with strong but flexible hold, and it delivered

5-star reviewer with side-swept bangs

Compares favorably to Kenra for hold and volume without weighing hair down

3-star reviewer comparing to another brand

Review snapshot shows a large share of reviewers cite 'Strong Hold' as a pro, with a small minority calling it sticky

aggregated review snapshot (117 cited strong hold, 8 cited sticky)

More from Nioxin

How this page was made

  • Everything above is generated from our researched product record — identity, the ingredient list as printed, the brand's own claims, dated price observations, and review themes written in our researchers' own words. No part of this page is written per product.
  • The value band is a fixed label over two stored numbers: this product’s cost per ounce as a percentile of every product of this type we have priced, each at the size it is most often sold in, and how many products we score as doing the same job cost at least a quarter less per ounce.
  • Both scores out of ten are defined on this page. The formula score is completeness for the job, computed from a fixed per-format checklist shown beneath the gauge; the price score is cost per ounce against every product of this type we have priced.
  • The "Is this right for you?" panel reads only your own consultation answers, and it applies exactly the filters our recommendation engine applies. It is computed when you load the page and is never stored on it.
  • 3 sources consulted for this product (0 manufacturer or regulatory, 1 retailer, 2 editorial), last checked 2026-09-13.
  • Ingredient references are linked for 7 of 11 product-aware annotations on this page. Fit notes are conditional formulation guidance, not a conclusion about the finished product or about you.
  • We have not tested this product in a lab and we do not physically test your hair. Formula readings come from the ingredient list; behaviour claims are labelled as the brand's.
  • Ingredient order tells you relative amount only above roughly 1%. Prices are observations on the dates shown and change without notice.
  • Ingredient names link to our ingredient library, where each entry shows what it does, which product types use it, and where it usually sits on a label across everything we have researched.
  • This is cosmetic information, not medical advice, and nothing here diagnoses or treats a health condition.
  • Formula readings: derivation v22. Record last updated 2026-08-27.