Hydrates scalp to support natural hair growth
Humectants or rich emollients sit in the first eight ingredients.
- Pentylene Glycol
- Panthenol
- Propanediol
Supported
Helps hair feel hydrated.
OGX
ProGrowth + Peptide Hair Strengthening Scalp Serum
Scalp treatment
- Scalp treatment
- Sulfate-free
- Silicone-free
- Not cruelty-free · PETA-listed
Size0.33 fl oz
Price$10.99seen at one store · 0.33 oz
Price / oz$34.82/ozat 0.33 oz
Where to buy6 stores · $10.47–11.99
Listing used for research: target.com
Personal fit
Is this right for you?
Complete the consultation to see exactly how well this product fits your hair and your goals. With 2,400+ products in our library we can match exactly the right products to you.
- In 10 minutes we can identify your exact hair condition and traits.
- Every product matched against your hair across the 18 factors we check.
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- Find products that do the same job at a lower cost.
- Your goals, scalp, damage history, water, budget, and scent preferences all shape your plan.
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Factor
Your profile
Fit
Best for hair types
Wavy–Coily
Not in your profile
Moisture level
High
Not in your profile
Slip / detangling
Little
Not in your profile
Weight on hair
Light
Not in your profile
Fragrance
None listed
Not in your profile
Protein
Prominent
Not in your profile
Silicone / wax buildup
None
Not in your profile
Clarifying wash needed
Moderate
Not in your profile
Parabens / preservatives
None of these listed
Not in your profile
Essential oils
None listed
Not in your profile
Show all 18 factors we check
The rest of what your plan weighs on this product.
Fast-drying alcohol
None
Not in your profile
Vegan / cruelty-free
Not cruelty-free · PETA-listed
Not in your profile
Animal-derived ingredients
Not yet verified
Not in your profile
Heavy humectants
Not heavy
Not in your profile
Hard-water defence
High
Not in your profile
UV filter
None listed
Not in your profile
Ingredient list
16 ingredientsAbout average
Not in your profile
Price tier
Drugstore
Not in your profile
The consultation builds your hair profile, then reads every factor in this table against it — and tells you where this product fits, or what to use instead.
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Your avoid-list
Same job for less elsewhere
$34.82/oz at 0.33 oz — more than 93% of the 154 scalp treatments , which mostly run $3.25–20.21/oz.
Great for
no fragrance (parfum) on the label
Protein-hungry hairthat stretches and stays stretched when wet
Fine hairthat flattens under most products
Silicone-free routinesno silicones appear in the list
Very dry hairno fast-drying alcohol in the list
Tight budgetsit sits in the lower price tiers
Maybe skip if
Protein-sensitive hairthat goes stiff or straw-like on protein
Vegan and cruelty-freeour record does not support both claims here
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.
Slip and detangling
Little
Nothing here is built to reduce combing force.
Oils and butters
None
No oils or butters in the list.
Weight on the hair
Light
Water-first and light: unlikely to flatten fine hair.
Water-binding (humectants)
High
Humectants near the top — water-binding is a headline mechanism here.
Protein
Prominent
Protein high in the list — a strengthening formula, not a moisture one.
Needs detergent to remove
No
Nothing here needs a detergent wash to remove.
Hard-water defence
Chelators present
Chelators are present — they bind hard-water and pool minerals.
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.
| Ingredient | What it does | Why it matters | Chip |
|---|---|---|---|
| WaterWater (Aqua) | solvent | The base everything else is dissolved in | Neutral |
| Pentylene Glycol | humectant | Pulls water into the hair | Moisturizes |
| Pisum Sativum (Pea) Peptide | protein | Firms up soft, over-stretchy hair | Protein |
| Niacinamide | vitamin | A marketed vitamin addition | Detangles |
| Hydrolyzed Rice Protein | film former | Lays down the film that holds a shape | Protein |
| Panthenol | humectant | Pulls water into the hair | Detangles |
| Caffeine | active | The over-the-counter active | Active |
| Feverfew flower, leaf and stem juiceChrysanthemum Parthenium (Feverfew) Flower/Leaf/Stem Juice | botanical extract | A trace plant extract | Stabilizes |
What the list leaves out, and what it carriesThe list carries no sulfates, silicones, or drying alcohols. Protein sits high: this is a strengthening step rather than a moisture one. Hard-water chelators are present.
Full ingredient list (16)
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
· Water (Aqua)
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 ingredientListed in the first three ingredients, it is likely a structural part of this formula.
- solvent
-
2
Pentylene Glycol
General function
A humectant that also helps preserve the formula, often used where a brand wants a short preservative list.
Leading ingredientListed in the first three ingredients, it is likely a structural part of this formula.
PubChemMay suitFine or easily flattened hairLight and water-binding rather than oily, so it hydrates without contributing weight.
May suitVery dry or highly damaged hairA small water-binding solvent. It holds moisture and helps the rest of the formula spread evenly over the strand.
DependsClimate-sensitive or frizz-prone hairA humectant follows the air: it holds water in humid conditions and can give it up in very dry ones. Climate decides what it does more than the label does.
- humectant
- solvent
- preservative
-
3
Pisum Sativum (Pea) Peptide
General function
A short-chain pea protein used for strength and body claims in vegan formulas.
Leading ingredientListed in the first three ingredients, it is likely a structural part of this formula.
May not suitProtein-sensitive hairA large surface-depositing protein. If protein reliably makes your hair feel rigid, this is the form most likely to do it.
DependsVery dry or highly damaged hairUnhydrolysed protein is too large to enter the strand. It sits on the surface, which is a coating effect rather than internal reinforcement.
- protein
-
4
Niacinamide
General function
Vitamin B3, used in scalp products for conditioning claims.
Supporting ingredientListed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.
PubChemMay suitFrizz-prone, damaged, or high-friction hairDeposits a lubricating layer that makes combing easier, which is most of what stops mechanical damage adding to frizz.
- vitamin
- conditioning agent
-
5
Hydrolyzed Rice Protein
General function
A light plant protein that adds body and shine, popular in volume products.
Supporting ingredientListed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.
May suitFrizz-prone, damaged, or high-friction hairFilling surface gaps evens out the cuticle, which is part of what makes damaged hair comb and reflect light more like undamaged hair.
May suitMaximum-hold stylingFilm formers are what hold a style: they dry into a connected film across the strands so the shape resists movement.
May suitVery dry or highly damaged hairHydrolysed fragments are small enough to sit in the gaps of a worn cuticle for a wash or two, temporarily restoring stiffness and cutting breakage in combing.
- film former
- protein
- hydrolysed protein
-
6
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.
Supporting ingredientListed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.
PubChemMay suitFine or easily flattened hairIt hydrates without adding oil or a film, which is the combination fine hair usually needs.
May suitFrizz-prone, damaged, or high-friction hairDeposits a lubricating layer that makes combing easier, which is most of what stops mechanical damage adding to frizz.
May suitVery dry or highly damaged hairA humectant that also penetrates the cuticle, so it holds water inside the strand rather than only on the surface.
- humectant
- conditioning agent
- vitamin
-
7
Caffeine
General function
Included in scalp and thickening products for label appeal. Evidence for applied caffeine changing hair growth is limited.
Supporting ingredientPubChemListed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.
- active
- ▾Below about this point, order stops being meaningful — these are typically used at 1% or less.
-
8
Feverfew flower, leaf and stem juice
· Chrysanthemum Parthenium (Feverfew) Flower/Leaf/Stem Juice
General function
Juice from feverfew flowers, leaves and stems, used for antioxidant and skin-conditioning functions in cosmetics.
Estimated lower-concentration zoneIt appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
- botanical extract
- antioxidant
- 9 Mangifera Indica (Mango) Leaf Extract
-
10
Isochrysis Galbana Extract
- botanical extract
-
11
Propanediol
General function
A corn-derived humectant and solvent, often chosen as a lighter-feeling alternative to propylene glycol.
Estimated lower-concentration zoneIt appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
PubChemMay suitFine or easily flattened hairLight and water-binding rather than oily, so it hydrates without contributing weight.
May suitVery dry or highly damaged hairA small water-binding solvent. It holds moisture and helps the rest of the formula spread evenly over the strand.
DependsClimate-sensitive or frizz-prone hairA humectant follows the air: it holds water in humid conditions and can give it up in very dry ones. Climate decides what it does more than the label does.
- humectant
- solvent
-
12
Hydroxyethylcellulose
General function
A cellulose thickener that gives gels and conditioners their body and adds a soft, flexible film.
Estimated lower-concentration zoneIt appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
PubChemMay suitCurls or waves needing flexible holdA polysaccharide film stays softer than a synthetic one as it dries, which is what leaves a curl defined but still able to move.
May suitFrizz-prone, damaged, or high-friction hairA soft film binds neighbouring strands together, which is most of what keeps flyaways lying down without stiffness.
May not suitMaximum-hold stylingGum films stay soft. A style that needs firm fixation usually wants a synthetic polymer doing the holding.
- gum
- thickener
- film former
-
13
Disodium EDTA
General function
Grabs metal ions from hard water so they cannot dull the hair or destabilise the formula.
Estimated lower-concentration zoneIt appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
PubChemMay suitBuild-up-sensitive routinesBinds the calcium and magnesium in hard water, which is what stops mineral deposits accumulating on the strand wash after wash.
May suitGray, silver, or brass-prone hairCopper and iron carried in tap water deposit on the strand and read as a dull, warm cast on gray or light hair. A chelator holds those metals in solution so the wash carries them off.
- hard-water chelator
-
14
Sodium Benzoate
- preservative
-
15
Citric Acid
General function
Used to bring the product to a slightly acidic pH, which helps the cuticle lie flat. It is almost always near the end of the list.
Estimated lower-concentration zoneIt appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
International Journal of TrichologyMay suitBuild-up-sensitive routinesHolds hard-water minerals in solution so they rinse away instead of depositing on the hair.
May suitFrizz-prone, damaged, or high-friction hairThe acid side of pH adjustment, and the reason it matters is measured: alkaline formulas raise the fibre's surface negative charge, increase friction between strands and lift the scales, while lower-pH ones do the reverse.
May suitGray, silver, or brass-prone hairWhere a warm cast comes from water minerals rather than from the hair itself, holding those metals in solution is what removes it.
- pH adjuster
- hard-water chelator
-
16
Sodium Hydroxide
General function
A strong base used in trace amounts to raise pH; fully neutralised in the finished product.
Estimated lower-concentration zoneIt appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
International Journal of TrichologyDependsFrizz-prone, damaged, or high-friction hairThe alkali half of a pH-adjusting pair, used in small amounts to bring a formula up to its target rather than to make it alkaline. Alkaline conditions raise the fibre's surface charge and lift the scales — but the finished pH is not on the label.
- pH adjuster
What the whole list adds up to
- 3 solvents
- 3 humectants
- 2 preservatives
- 2 proteins
- 2 vitamins
- 2 conditioning agents
- 2 film formers
- 2 botanical extracts
- 2 hard-water chelators
- 2 pH adjusters
- 1 hydrolysed protein
- 1 active
- 1 antioxidant
- 1 gum
Drug facts actives
- undefined
This product is an over-the-counter drug as well as a cosmetic. It treats a cosmetic scalp condition; it does not diagnose or treat disease.
Ingredient list captured 2026-09-13. Formulas change — check the package in your hand when an ingredient matters to you.
Price · 0.33 oz
Seen at
$10.99
Good value under
$1
Priced above the products that do the same job. Stores sell it above the $1 line; products that do this job typically go for about $3 at this size.
Show the price ladder
Where we’ve seen it6 listings · 5 stores
0.33 ozmost listed
-
Target
$10.490.33 oz · $31.79/ozSep 13Lowest per oz
-
Maceys
$10.990.33 oz · $33.30/ozSep 14
-
Ulta Beauty
$11.990.33 oz · $36.33/ozSep 14
6 oz
-
CVS
$10.996 oz · $1.83/ozSep 14Lowest per oz
6.5 ozBest per ounce
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. and 1 listing we don’t count — grey-market or unverified sellers.
How we work this out
- 0.33 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.
- Seen at $10.99 is the price we have observed for the 0.33 oz. We need three stores before we call a price commonly seen.
- Good value under $1 comes from the 8 products we score as doing the same job as this one. A quarter of them cost less than $3.06/oz; at 0.33 oz that is $1. Under that line you are paying less than most of them.
- About $3 is what those same products typically cost at this size — the midpoint of their prices per ounce, scaled to 0.33 oz.
Formula
3
Formula score
3 of 10
Above the range for scalp treatments per ounce for a shorter formula — there is no conditioning agents up front — with 5 close matches costing less.
How the score is counted
- 5 products that do the same job cost less per ounce
- Costs more per ounce than 93% of the 154 scalp treatments we’ve priced
- No conditioning agents up front in the formula
- No oils or butters in the working zone either
- Conditioning agents up frontWhat makes wet hair comb through.3 pts
- Oils or butters in the working zoneSoftens the strand rather than just coating it.2 pts
- Slip for detanglingReduces the force it takes to comb wet hair.2 pts
- A humectantBinds water into the hair.1 pt
- A pH adjusterBrings the formula to the acidic pH hair prefers.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.
Bounce CurlLowest cost per oz
Turmeric Purifying Hair & Scalp Mask
$3.25/oz $31.57/oz less
- Vegan & CF
- Differs
DrybarClose function
Crown Tonic Pre-Shampoo Scalp-Balancing Cleanser
$6.33/oz $28.49/oz less
- Differs
Paul MitchellClose function
Clean Beauty Scalp Therapy Drops
$13.40/oz $21.42/oz less
- Scalp active
- Differs
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
Final decision
Should you buy it?
Good for the right person, not the lowest costBest user
People sensitive to fragrance — for a formula with no added fragrance and protein high in the formula
Biggest tradeoff
Worth skipping for hair that stiffens on protein or vegan and cruelty-free shopping
Best alternative if not
Bounce Curl Turmeric Purifying Hair & Scalp Mask, for similar results at a lower price
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.
2
SupportedBacked by ingredients
0
Partly supportedSome supporting logic
2
Stated by brandNo clear evidence
0
Potential conflictFormula works against claim
Reinforces roots in just 1 use (with full routine)
This is a marketing claim; an ingredient list cannot speak to it.
—
Stated by brand
Can’t be confirmed from label.
Reduces hair fall due to breakage
Protein sits in the first eight ingredients.
- Pisum Sativum (Pea) Peptide
- Hydrolyzed Rice Protein
Supported
Reinforces a damaged strand.
Fast-absorbing, water-based formula
Nothing in the list settles how easily this rinses out.
- Water
- Pentylene Glycol
- Propanediol
Stated by brand
Can’t be confirmed from label.
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.
Many reviewers say results were inconclusive after weeks of consistent daily use, with no visible change in hair growth, thickness or density.
A recurring complaint targets the twist/push applicator, which many reviewers find hard to unlock, prone to leaking, or breaking after a short time.
Some reviewers report the serum left hair or scalp feeling greasy, itchy or irritated, and a few describe a small bottle that runs out quickly relative to the price.
Reviewers repeatedly describe the serum as lightweight, fast-absorbing and non-greasy, leaving little to no residue on the scalp.
The fragrance-free formula is appreciated by reviewers with scalp sensitivity, though a few wished it had some scent.
More from OGX
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.
- 5 sources consulted for this product (1 manufacturer or regulatory, 0 retailer, 4 editorial), last checked 2026-09-14.
- Ingredient references are linked for 8 of 10 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 2026-09-14.