Clinically tested to hydrate the scalp for 24hrs in one use
A brand-run study. We report it as stated and do not repeat the number as fact.
—
Stated by brand
Only the brand’s testing shows this.
Biolage
Hydra Source Moisture Method Scalp & Hair Serum
Finisher / Serum, lightweight
- Finisher
- serum
- Sulfate-free
- Silicone-free
- Protein-free
- Vegan · label states
Size3.04 fl oz
Price$40seen at one store · 3.04 oz
Price / oz$13.33/ozat 3.04 oz
Where to buy2 stores · $40.00–40.00
Scent:
The ingredient list declares fragrance. What it smells of is not stated, and we do not guess.
Listing used for research: ulta.com
Personal fit
Is this right for you?
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Factor
Your profile
Fit
Best for hair types
All types
Not in your profile
Moisture level
High
Not in your profile
Oils and butters
None
Not in your profile
Slip / detangling
Little
Not in your profile
Weight on hair
Light
Not in your profile
Fragrance
Present
Not in your profile
Protein
None
Not in your profile
Silicone / wax buildup
None
Not in your profile
Clarifying wash needed
Low
Not in your profile
Parabens / preservatives
None of these listed
Not in your profile
Show all 22 factors we check
The rest of what your plan weighs on this product.
Essential oils
Present
Not in your profile
Fast-drying alcohol
None
Not in your profile
Vegan / cruelty-free
Vegan · label states
Not in your profile
Animal-derived ingredients
Vegan · label states
Not in your profile
Aerosol can
Pump or tube
Not in your profile
Needs heat to set
Not determined
Not in your profile
Heavy humectants
Heavy
Not in your profile
Hard-water defence
High
Not in your profile
UV filter
None listed
Not in your profile
Ingredient list
31 ingredientsA long list
Not in your profile
Price tier
Salon
Not in your profile
Where to buy it
Salons · Specialty beauty
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.
Start your consultation$49.00 once, for your consultation and hair profile. No subscription, no required purchases.
Your avoid-list
Upper-mid price for a serum
$13.33/oz at 3.04 oz — more than 66% of the 77 serums , which mostly run $3.25–14.50/oz. The cost less.
Great for
Protein-sensitive hairthat stiffens when protein is added
Fine hairthat flattens under most products
Silicone-free routinesno silicones appear in the list
Stretching wash daysnothing here needs a detergent to remove
Very dry hairno fast-drying alcohol in the list
Aerosol avoidancea pump or tube, not a pressurised can
Maybe skip if
this product carries a scent
Hair that reads dullno recognised shine system in the list
Dry or very humid airwhere heavy humectants work against you
Tight budgetsit sits in the upper price tiers
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.
Weight on the hair
Light
Water-first and light: unlikely to flatten fine hair.
Oils and butters
None
No oils or butters in the list.
Needs detergent to remove
No
Nothing here needs a detergent wash to remove.
Fast-drying alcohol
None
No fast-drying alcohol in the list.
Fragrance
Present
Fragrance is listed; it sits below the working ingredients.
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 |
|---|---|---|---|
| Water | solvent | The base everything else is dissolved in | Neutral |
| Glycerin | humectant | Pulls water into the hair | Moisturizes |
| Sodium Hyaluronate | humectant | Pulls water into the hair | Moisturizes |
| Sodium PCA | humectant | Pulls water into the hair | Moisturizes |
| Phenoxyethanol | preservative | Keeps the product from spoiling | Stabilizes |
| Caprylyl/Capryl Glucoside | nonionic cleanser | — | Cleanses |
| Citric Acid | pH adjuster | Fine-tunes the pH | pH balancer |
| Aloe Barbadensis Leaf Juice | humectant | Adds a little water-binding | Moisturizes |
| Fragrance | fragrance | The scent | Fragrance |
| Chlorphenesin | preservative | Keeps the product from spoiling | Stabilizes |
| Carvone | fragrance | The scent | Fragrance |
| Limonene | fragrance | The scent | Fragrance |
What the list leaves out, and what it carriesNo sulfates, silicones, or drying alcohols. Protein-free: this is built for moisture rather than for strengthening. Contains fragrance. Chelators for hard water.
Full ingredient list (31)
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
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
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.
Leading ingredientListed in the first three ingredients, it is likely a structural part of this formula.
Scientific ReportsMay suitDry, coarse, or high-porosity hairHigh-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 hairBinds 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 hairWater moves both ways. Measured across concentrations, glycerin solutions give water up in some conditions and take it from the air in others. What it does for you depends on how much of it is there and on the air around it.
- humectant
-
3
Sodium Hyaluronate
General function
A large water-binding molecule that sits on the surface holding moisture.
Leading ingredientListed in the first three ingredients, it is likely a structural part of this formula.
May suitDry, coarse, or high-porosity hairHigh-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 hairBinds 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 hairA 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.
- humectant
-
4
Sodium PCA
General function
A moisture-binding ingredient that occurs naturally in hair and skin.
Supporting ingredientListed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.
PubChemMay suitDry, coarse, or high-porosity hairHigh-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 hairBinds 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 hairA 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.
- humectant
- ▾Below about this point, order stops being meaningful — these are typically used at 1% or less.
-
5
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 zonePubChemIt appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
- preservative
-
6
Caprylyl/Capryl Glucoside
General function
A very mild sugar-derived cleanser, often used to boost the foam of other gentle surfactants.
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.
May suitDry, coarse, or high-porosity hairMild cleansing leaves more surface lubrication in place on hair that dries out quickly.
May suitVery dry or highly damaged hairA sugar-derived non-ionic detergent, among the gentlest in use. It cleanses with little foam of its own and little sebum removal.
May not suitBuild-up-sensitive routinesGentle cleansing leaves water-insoluble deposits largely in place; they come off with a stronger wash, not this one.
- nonionic cleanser
- cleanser
-
7
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
-
8
Aloe Barbadensis Leaf Juice
General function
Aloe gel, used for light moisture and slip. High in the list it also contributes a little natural hold.
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.
May suitCurls or waves needing flexible holdGums thicken and set soft, which gives definition that bends rather than a rigid cast.
May suitFine or easily flattened hairHydration with no oil attached, so it adds very little weight even high on a list.
May suitVery dry or highly damaged hairAloe is mostly water carrying sugars that bind more of it, which is why it turns up as the base of moisture-first formulas.
- humectant
- botanical extract
- gum
-
9
Fragrance
General function
An undisclosed blend of scent ingredients. Regulations let it stay unlisted, so a fragrance-free product is the only way to be certain what is not in it.
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.
May not suitFragrance-sensitive routinesDeclared fragrance. On a fragrance-sensitive routine this is the line that decides it, wherever it sits on the label.
- fragrance
- declared fragrance
-
10
Chlorphenesin
- preservative
-
11
Tetrasodium Glutamate Diacetate
General function
A biodegradable hard-water chelator used in place of EDTA.
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
-
12
Butylene Glycol
General function
A light humectant and carrier that helps extracts dissolve.
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
-
13
Carvone
General function
A mint- or caraway-scented fragrance component.
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.
May not suitFragrance-sensitive routinesDeclared fragrance. On a fragrance-sensitive routine this is the line that decides it, wherever it sits on the label.
- fragrance
-
14
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 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 not suitFragrance-sensitive routinesOne 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.
- fragrance
- named fragrance allergen
-
15
Citrus Aurantium Peel Oil
General function
A cold-pressed orange peel oil used for scent. Citrus oils are naturally high in limonene.
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.
May not suitFragrance-sensitive routinesEssential 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
-
16
Helianthus Annuus Seed Extract
- botanical extract
-
17
Hexyl Cinnamal
General function
A jasmine-like fragrance component named separately as a recognised allergen.
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 not suitFragrance-sensitive routinesOne 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.
- fragrance
- named fragrance allergen
-
18
Coumarin
General function
A sweet, hay-like fragrance component listed separately as a recognised allergen.
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 not suitFragrance-sensitive routinesOne 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.
- fragrance
- named fragrance allergen
-
19
Benzyl Alcohol
- preservative
- solvent
-
20
Amyl Cinnamal
General function
A jasmine-like fragrance component named separately as a recognised allergen.
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 not suitFragrance-sensitive routinesOne 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.
- fragrance
- named fragrance allergen
-
21
Linalool
General function
A floral fragrance component listed separately as a recognised contact allergen.
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 not suitFragrance-sensitive routinesOne 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.
- fragrance
- named fragrance allergen
-
22
Citrus Limon (Lemon) Peel Oil
· Citrus Limon Peel Oil
General function
A cold-pressed citrus oil used for a fresh scent; naturally high in limonene.
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.
May not suitFragrance-sensitive routinesEssential 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
-
23
Linalyl Acetate
General function
A lavender-like fragrance component, related to linalool and listed for the same allergen reason.
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.
May not suitFragrance-sensitive routinesOne 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.
- fragrance
- named fragrance allergen
-
24
Vanillin
General function
The main scent compound in vanilla, used as a fragrance note.
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 not suitFragrance-sensitive routinesDeclared fragrance. On a fragrance-sensitive routine this is the line that decides it, wherever it sits on the label.
- fragrance
-
25
Isoeugenol
General function
A spicy floral fragrance component named separately as a recognised allergen.
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.
May not suitFragrance-sensitive routinesOne 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.
- fragrance
- named fragrance allergen
-
26
Geraniol
General function
A rose-scented fragrance component, listed on its own because some people react to it.
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.
May not suitFragrance-sensitive routinesOne 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.
- fragrance
- named fragrance allergen
-
27
Alpha-Isomethyl Ionone
General function
A violet-like fragrance component named separately as a recognised allergen.
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 not suitFragrance-sensitive routinesOne 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.
- fragrance
- named fragrance allergen
-
28
Hydroxycitronellal
General function
A soft floral fragrance component named separately as a recognised allergen.
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 not suitFragrance-sensitive routinesOne 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.
- fragrance
- named fragrance allergen
-
29
Pinene
General function
A pine-scented component of essential oils, declared as part of the fragrance.
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.
May not suitFragrance-sensitive routinesDeclared fragrance. On a fragrance-sensitive routine this is the line that decides it, wherever it sits on the label.
- fragrance
-
30
Potassium Sorbate
- preservative
-
31
Sodium Benzoate
- preservative
What the whole list adds up to
- 16 fragrances
- 10 named fragrance allergens
- 5 humectants
- 5 preservatives
- 4 botanical extracts
- 3 solvents
- 2 hard-water chelators
- 2 essential oils
- 1 nonionic cleanser
- 1 cleanser
- 1 pH adjuster
- 1 gum
- 1 declared fragrance
Ingredient list captured 2026-09-08. Formulas change — check the package in your hand when an ingredient matters to you.
Price · 3.04 oz
Seen at
$40
Good value under
$8
Priced above the products that do the same job. Stores sell it above the $8 line; products that do this job typically go for about $12 at this size.
Show the price ladder
Where we’ve seen it2 listings · 2 stores
-
Ulta Beauty
$40.003.04 oz · $13.16/ozSep 8Lowest per oz
-
JCPenney
$40.003 oz · $13.33/ozSep 8
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
- 3.04 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 $40 is the price we have observed for the 3.04 oz. We need three stores before we call a price commonly seen.
- Good value under $8 comes from the 7 products we score as doing the same job as this one. A quarter of them cost less than $2.66/oz; at 3.04 oz that is $8. Under that line you are paying less than most of them.
- About $12 is what those same products typically cost at this size — the midpoint of their prices per ounce, scaled to 3.04 oz.
Formula
4
Formula score
4 of 10
It costs about what other serums cost per ounce, but the formula leaves out shine system, which most of the format carries.
How the score is counted
- 3 products we score as doing the same job cost less per ounce
- Costs more per ounce than 66% of the 77 serums we’ve priced
- No shine system in the formula
- No oils or butters in the working zone either
- A shine systemThe silicone, oil, or ester that produces gloss.3 pts
- A weightless carrierDelivers the shine without leaving grease.2 pts
- Oils or butters in the working zoneSoftens the strand rather than just coating it.2 pts
- An antioxidantKeeps the oils in the bottle from going off.1 pt
- No drying alcohol in the first threeFast drying without leading on alcohol.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.
LolaVieSame function
Glossing Detangler
$5.80/oz $7.53/oz less
- Protein-free
- Lightweight
- Silicone-free
- Differs
Sexy HairClose function
Healthy Sexy Hair Shine Show Blowout Spray - 5.1 oz
$4.50/oz $8.83/oz less
- Protein-free
- Silicone-free
- Rinses clean
- Function
- Also
VirtueLowest cost per oz
Damage Reverse Hair Serum
$0.02/oz $13.31/oz less
- Protein
- Silicone-free
- Rinses clean
- Function
- Also
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?
A solid pick for the hair it suitsBest user
Hair that stiffens on protein who want a protein-free formula and something that will not weigh hair down
Biggest tradeoff
Worth skipping for anyone sensitive to fragrance, hair that reads dull, or very dry or very humid climates
Best alternative if not
LolaVie Glossing Detangler, 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.
4
SupportedBacked by ingredients
0
Partly supportedSome supporting logic
1
Stated by brandNo clear evidence
0
Potential conflictFormula works against claim
Lightweight formula that won't weigh hair down
Light silicones and low wax content help it avoid visible residue.
- Water
- Butylene Glycol
- Benzyl Alcohol
Supported
Less likely to weigh hair down.
Vegan formula: No animal-derived ingredients or byproducts
Our researched record has this brand or product as vegan.
—
Supported
Matches our researched record.
Paraben-free
No parabens appear in the ingredient list.
—
Supported
Preserved without parabens.
Silicone-free
No silicones appear in the ingredient list.
—
Supported
Nothing that needs a strong wash.
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.
Has a pleasant, mild fragrance and premium glass bottle packaging with easy dropper
Users appreciating both the scent and the thoughtful product presentationLeaves hair feeling soft, smooth, and noticeably more manageable
Users experiencing improved hair texture and feel after applicationDelivers hydration and moisture to hair without leaving it feeling heavy or oily
Users with dry hair noting improved hydration while maintaining lightness and avoiding residueTames frizz and imparts visible shine to dull, dry hair
Users with frizzy, dull hair noticing frizz control and increased luminosityAddresses scalp dryness, itchiness, and flakiness with regular use
Users with dry, irritated scalps reporting relief and improvement in scalp healthMore from Biolage
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.
- 4 sources consulted for this product (2 manufacturer or regulatory, 1 retailer, 1 editorial), last checked 2026-09-08.
- Ingredient references are linked for 13 of 24 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 2026-09-08.