US Beauty & Personal Care / Hair Care / Styling Products / Serums

An overnight leave-in hair serum built on plant-based proteins and niacinamide. Independent multi-source analysis of the US listing, ingredient dossiers and long-run price record.

Brand Kerastase Sold by Kerastase Size 90 ml / 3.04 fl oz Rating 4.6 / 5 Ratings 11,394 Price $64.00 Snapshot 2026-11-01

1. Product Information

Kerastase Nutritive 8H Magic Night Serum is an overnight leave-in treatment positioned for dry hair. The formula is built around two headline actives the listing repeats throughout: plant-based proteins, described as nourishing the hair with essential nutrients while retaining moisture, and niacinamide, described as locking in hydration for long-lasting hair strength. It is the night-time step of the wider Nutritive routine, intended to sit alongside a conditioner or mask and a daytime heat protectant. Within the US catalogue it is filed under Hair Care > Styling Products > Serums, and at capture it ranked #2 in Hair Styling Serums and #1,027 in Beauty & Personal Care.

Use is deliberately low-effort and low-frequency: one to two pumps massaged into the lengths and ends of dry or damp hair before sleep, left in overnight, and not rinsed out in the morning, with the listing suggesting a three-nights-a-week cadence. The claimed mechanism is that the serum absorbs during the night rather than sitting on the surface, so it protects the hair from pillow friction, reduces frizz, detangles and adds shine by morning without transferring onto bedding.

1.1 Product Imagery

Kerastase Nutritive 8H Magic Night Serum 90 ml pump bottle, studio pack shot — Studio pack shot: 90 ml / 3.04 fl oz pump bottle with a red-to-peach gradient body, silver collar and dark maroon cap. **Source: Amazon**

Before and after hair comparison for the Nutritive routine — Before/after hair comparison with inset strand close-ups: frizzier, duller waves versus smoother, glossier, more defined waves. **Source: Amazon**

Kerastase 8H Magic Night Serum bottle with French claim copy — Lifestyle pack shot with claim copy: 72H humidity protection, 72H long-lasting nutrition, +48% softness, for dry hair. **Source: Amazon**

1.2 Listing Specifications

Attribute	Value	Attribute	Value
Product benefits	Nourishing	Hair type	All
Material type free	Paraben free	Scent	Floral
Liquid volume	90 ml	Number of items	1
Unit count	3.04 fluid ounces	Item volume	3.04 fluid ounces
Item weight	90 g	Product dimensions	6.22 x 4.25 x 6.65 in; 3.17 oz
Brand / Manufacturer	Kerastase	Item model number	Nutritive - 8H Magic Night
GTIN	03474637155025	EAN	347463715502
Availability	In Stock	Delivery reference	New York 10001
Best Sellers Rank	#1,027 in Beauty & Personal Care; #2 in Hair Styling Serums

1.3 Declared Benefits and Directions

What the listing claims

Nourishing leave-in serum that hydrates, adds deep nutrition, moisturises and detangles, leaving hair soft and shiny by morning.
Protects from pillow friction, reduces frizz and hydrates hair in eight hours while you sleep.
Plant-based proteins nourish with essential nutrients while retaining moisture; niacinamide locks in hydration for long-lasting strength.
Intensely nourishes and detangles, strengthens, hydrates and enhances shine.
Absorbs overnight without transferring onto the pillow.
Paraben free, floral scent, suitable for all hair types prone to dryness.

Directions and routine placement

Before sleep, apply one to two pumps and massage into lengths and ends of dry or damp hair.
Leave in overnight. No rinse needed in the morning.
Repeat three nights a week.
Use with a Nutritive conditioner and/or mask plus a daytime heat protectant for best results.
Brand FAQ: "Apply 2 to 4 pumps to mid lengths and ends, leave in overnight, do not rinse, use as often as needed."
Instrumental claims carried in the listing imagery: 72H humidity protection, 72H long-lasting nutrition, +48% softness.

1.4 Brand Questions Answered

Question	Brand answer
What does the 8H Magic Night Serum do?	An overnight leave-in treatment that deeply nourishes dry hair, reduces frizz and enhances shine while you sleep.
What are the key ingredients?	Formulated with plant-based proteins and vitamins to provide intense hydration and restore the hair fibre.
Will it leave residue on the pillow?	No. The lightweight formula is described as absorbing completely into the hair overnight, leaving no greasy residue on bedding.
Does it need to be washed out in the morning?	No. You wake up with soft, detangled, nourished hair ready to style.
How does it compare within the range?	Positioned against Nectar Thermique (heat protection to 450 F, conditioning, detangling), Scalp Serum (immediate scalp hydration) and Split Ends Serum (seals split ends, reduces breakage, adds shine).

2. Product Rating and Buyer Sentiment

Average rating

4.6 / 5

11,394 ratings

Positive share

89%

4-star and above

Top rating share

81%

Five-star ratings

Negative tail

1-star and 2-star combined

2.1 Rating Distribution

Reading the distribution. The curve is strongly top-loaded and unusually polarised at the bottom. Five-star ratings account for 81% of 11,394 ratings and four-star for a further 8%, so 89% of raters sit at four stars or above, and the 4.6 mean is anchored by a very large satisfied majority. The middle is thin - three stars is 4% - while the negative tail re-weights upward: two stars is 3% and one star is 4%, meaning one-star ratings outnumber two- and three-star ratings combined. That inverted tail is the signature of a product most buyers rate highly but a minority reject outright, rather than one that delivers a mediocre average experience. Buckets are rounded integer percentages, so a stated 3% or 4% is not an exact count, and with a base of 11,394 a single point is roughly 114 ratings.

2.2 Aspect Sentiment

Eight aspects carry sentiment counts. Each bar shows the positive share of mentions; the count behind each aspect is printed at the right.

Aspect	Mentions	Positive	Negative	Positive share	Reading
Effectiveness	545	433	112	79%	Strongly positive
Fragrance	261	200	61	77%	Strongly positive
Value for money	254	111	143	44%	Split - the one weak spot
Softness	244	232	12	95%	Near-unanimous
Frizz control	227	181	46	80%	Strongly positive
Shine	109	105	4	96%	Near-unanimous
Non-greasy	96	88	8	92%	Near-unanimous
Lightweight	48	45	3	94%	Near-unanimous

Value for money at 44% positive is close enough to the halfway line to read as a genuinely divided aspect rather than a negative one, while every other aspect sits at 77% or better. The complaint, where it exists, is about what the product costs, not about what it does.

2.3 What Buyers Say

"Customers find this hair serum effective, noting that a little goes a long way and it smells fabulous. The product receives positive feedback for its softness, making hair feel like silk, and its ability to reduce frizz and moisturise bleached ends. They appreciate its shine-enhancing properties, with hair looking fresh and styled, and its non-greasy formula that doesn't weigh it down. While many customers consider it worth the price, some find it overpriced."

Aggregate summary published on the listing. No individual reviewer is named, quoted by handle, or linked.

Recurring positives and complaints

Recurring positives

Effectiveness - 433 of 545 mentions positive. "A little goes a long way" is the recurring phrasing.
Softness - 232 of 244 positive (95%); the "hair feels like silk" theme.
Shine - 105 of 109 positive (96%), the highest-scoring aspect.
Non-greasy and lightweight - 92% and 94% positive; "doesn't weigh it down".
Frizz control - 181 of 227 positive (80%).
Fragrance - 200 of 261 positive (77%); "smells fabulous".

Recurring complaints

Price - the only complaint with real volume. Value for money is the sole aspect below 50% positive, at 44% (111 positive against 143 negative across 254 mentions).
No other aspect falls below 77% positive, so value is a single isolated objection rather than part of a broader quality problem.

Capture limitation. No individual US review text could be retrieved in this run - the desktop listing, the mobile listing and the review-endpoint fallbacks all returned zero inline reviews. The themes above come from the aggregate summary and the aspect-level sentiment counts, not from verbatim reviews. No buyer photo gallery was rendered on the listing either, so no user-submitted imagery is presented.

3. Ingredient Analysis

Two independent ingredient dossiers were captured and merged for this section: an ingredient database carrying 27 rated entries, and a claim-and-benefit database carrying 29 entries including the two colorants. Merging them yields a 29-ingredient list in INCI order, with function from the claim database and safety, comedogenic and irritancy ratings from the ingredient database. Twenty-seven of the 29 entries carry a safety rating; the two colorants do not.

3.1 What's Inside - Claim Matrix

Twelve claims were tested. Six pass and six fail. Read the polarity carefully: a claim marked means the product is not that thing.

Oil-free

Oil Free

Paraben-free

Confirmed

Sulfate-free

Sulfate free

Fungal-acne-safe

Fungal Acne-Safe

Pore-clogger-free

No potential pore cloggers found

Reef-safe

Reef safe

Not alcohol-free

Contains benzyl alcohol

Not EU-allergen-free

Nine declarable fragrance allergens present

Not fragrance-free

Contains Fragrance - see 3.5

Not silicone-free

Dimethicone at position 2

Not cruelty-free

Flagged as not cruelty free

Not vegan

Flagged as not vegan

3.2 Ingredients List - 29 Entries in INCI Order

Level is derived from the safety rating's upper bound: 1 is the safest figure and a higher value calls for more caution. Comedogenic and irritancy run the other way, where 0 is safest. A dash means not rated - which is missing data, not a clean bill of health.

#	Ingredient	Function	Comedogenic	Irritancy	Safety	Level
1	Water	Skin conditioning	-	-	1	Level 1
2	Dimethicone	Emollient	1	0	2-5	Level 5
3	C13-16 Isoparaffin	Solvent	-	-	1	Level 1
4	Niacinamide	Smoothing	-	-	1	Level 1
5	Glycerin	Humectant	0	0	1-2	Level 2
6	Polyacrylamide	Viscosity control, antistatic	-	-	2-6	Level 6
7	Phenoxyethanol	Preservative	-	-	2-4	Level 4
8	C13-14 Isoparaffin	Emollient	-	-	1	Level 1
9	Laureth-7	Emulsifying	-	-	1-2	Level 2
10	Panthenol	Skin conditioning	0	0	1	Level 1
11	Ascorbyl Glucoside	Antioxidant	-	-	1	Level 1
12	Butylene Glycol	Humectant	1	0	1	Level 1
13	Linalool	Perfuming	-	-	3-4	Level 4
14	Hydroxycitronellal	Perfuming	-	-	3	Level 3
15	Benzyl Salicylate	Perfuming	-	-	3-4	Level 4
16	Benzyl Alcohol	Perfuming, preservative, solvent	-	-	4	Level 4
17	Hexyl Cinnamal	Perfuming	-	-	4	Level 4
18	Citronellol	Perfuming	-	-	3-4	Level 4
19	Hydrolyzed Wheat Protein	Skin conditioning, antistatic	-	-	1-4	Level 4
20	Alpha-Isomethyl Ionone	Perfuming	-	-	3	Level 3
21	Coumarin	Perfuming	-	-	4	Level 4
22	Hydrolyzed Corn Protein	Skin conditioning, antistatic	-	-	1	Level 1
23	Hydrolyzed Soy Protein	Humectant, antistatic	-	-	Not rated	Not rated
24	Limonene	Perfuming	-	-	3	Level 3
25	Iris Florentina Root Extract	Masking	-	-	1	Level 1
26	Citric Acid	Buffering	-	-	1-2	Level 2
27	CI 19140 / Yellow 5	Cosmetic colorant	-	-	Not rated	Not rated
28	CI 14700 / Red 4	Cosmetic colorant	2	1	Not rated	Not rated
29	Parfum / Fragrance	Masking	-	-	4	Level 4

3.3 Ingredient Count by Safety Level

Level	Meaning	Count	Share	Representative ingredients
Level 1	Lowest concern band	9	31.0%	Water, Niacinamide, Glycerin-free base; Panthenol, Ascorbyl Glucoside, Butylene Glycol
Level 2	Low concern	3	10.3%	Glycerin, Laureth-7, Citric Acid
Level 3	Moderate caution	3	10.3%	Hydroxycitronellal, Alpha-Isomethyl Ionone, Limonene
Level 4	Elevated caution	9	31.0%	Parfum, Benzyl Alcohol, Hexyl Cinnamal, Citronellol, Linalool, Coumarin
Level 5	Higher caution	1	3.4%	Dimethicone (2-5)
Level 6	Highest band in this list	1	3.4%	Polyacrylamide (2-6)
Not rated	No data	3	10.3%	Hydrolyzed Soy Protein, CI 19140, CI 14700

The distribution is barbelled: 12 ingredients sit at Level 1-2 and 10 at Level 4-6, with only three in the Level 3 middle. That shape is not random - the low band is the solvent and humectant base plus the marketed actives, and the high band is almost entirely the fragrance system. Two ingredients carry a range (Dimethicone 2-5, Polyacrylamide 2-6), which means the underlying sources disagree; both are classified on the upper bound, so neither is understated.

3.4 Functional Composition

Functional group	Ingredients	Count	Role in the formula
Perfuming and masking	Linalool, Hydroxycitronellal, Benzyl Salicylate, Benzyl Alcohol, Hexyl Cinnamal, Citronellol, Alpha-Isomethyl Ionone, Coumarin, Limonene, Parfum, Iris Florentina Root Extract	11	The signature Nutritive floral scent and its declarable allergens
Skin conditioning and proteins	Water, Panthenol, Hydrolyzed Wheat Protein, Hydrolyzed Corn Protein	4	Conditioning base and the marketed plant-protein payload
Humectants	Glycerin, Butylene Glycol, Hydrolyzed Soy Protein	3	Water binding and hydration performance
Emollients and solvents	Dimethicone, C13-16 Isoparaffin, C13-14 Isoparaffin, Benzyl Alcohol	4	Smoothing film plus the volatile carrier that keeps it light
Emulsifying and texture	Laureth-7, Polyacrylamide	2	The gel network that suspends the silicone phase
Preservative, pH and antioxidant	Phenoxyethanol, Citric Acid, Ascorbyl Glucoside	3	Shelf stability, pH adjustment, antioxidant support
Actives and colorants	Niacinamide, CI 19140, CI 14700	3	The headline vitamin B3 derivative and the two dyes

Structural read. The fragrance system is the single largest functional group - 11 of 29 entries, or 38% of the list. That is consistent with the brand's positioning of the Nutritive scent as a signature element and with the floral scent claim on the listing. The formula is also silicone-led: Dimethicone sits at position 2, immediately after water, so the smoothing film is delivered at real concentration. The volatile isoparaffin pair (C13-16 and C13-14) is what lets a dimethicone film read as non-greasy - which is exactly the aspect buyers rate at 92% positive.

3.5 Flagged Ingredients

All ten flagged entries are fragrance materials. The single highest safety figure in the list is 4, and it is reached only inside the fragrance block.

Level 4 - elevated caution

Ingredient	Safety	Function
Parfum / Fragrance	4	Masking
Benzyl Alcohol	4	Perfuming, preservative, solvent
Hexyl Cinnamal	4	Perfuming
Coumarin	4	Perfuming
Linalool	3-4	Perfuming
Benzyl Salicylate	3-4	Perfuming, UV absorber
Citronellol	3-4	Perfuming
Hydrolyzed Wheat Protein	1-4	Conditioning, antistatic
Phenoxyethanol	2-4	Preservative

Level 3 - moderate caution

Ingredient	Safety	Function
Hydroxycitronellal	3	Perfuming
Alpha-Isomethyl Ionone	3	Perfuming
Limonene	3	Perfuming, solvent

Declared EU fragrance allergens

Nine of them: Linalool, Hydroxycitronellal, Benzyl Salicylate, Benzyl Alcohol, Hexyl Cinnamal, Citronellol, Alpha-Isomethyl Ionone, Coumarin and Limonene. Three - Linalool, Citronellol and Limonene - are also recognised essential-oil allergens. Their separate declaration means the listing is properly labelled, not that the fragrance load is low.

The fragrance verdict is not ambiguous here. Both the umbrella entry (Parfum / Fragrance at position 29) and eight individually named allergens are declared, so "contains fragrance" rests on named entries rather than on inference from function labels. Overnight contact with a pillow also extends exposure well beyond that of a rinse-off conditioner.

3.6 Benefit and Concern Signals

Benefits by supporting ingredient count

Community sentiment on the ingredient list

Benefit labels are generated by the claim database from ingredient-function matching and are skin-oriented vocabulary applied to a hair product - the database was built for facial skincare. Names such as "Scar Healing", "Dark Spots" or "Reduces Large Pores" are not claims the brand makes for this serum and should not be read as such. The ingredient counts behind each benefit are the useful part: benefits backed by four or five ingredients rest on real formulation depth, while those backed by one are weak evidence.

Class-level concerns flagged

Concern	Description
May worsen irritation	May cause stinging, redness, or sensitivity.
May worsen eczema	May worsen itching or irritation for eczema.
May worsen rosacea	Can trigger flare-ups in rosacea-prone skin.
May worsen oily skin	May increase shine or excess oil.

These are ingredient-class warnings - "this formula contains ingredients capable of ..." - not a verdict on the product or on any individual. Every one of them traces back to the fragrance system or to the silicone and humectant load.

Key ingredient groups recognised

Group	Mechanism	Ingredients
Vitamin C	Brightens, evens tone, supports collagen	1
Niacinamide	Strengthens, smooths, brightens	1
Antioxidants	Shields from free radical damage	1

The Vitamin C and antioxidant groups both resolve to the same single entry, Ascorbyl Glucoside at position 11. The database does not separately recognise the hydrolysed wheat, corn and soy protein trio that the brand markets as its plant-based protein complex, because protein conditioning is not a category this skin-oriented database scores.

3.7 Formula Logic

Group	Ingredients	Role
Solvent base	Water; C13-16 Isoparaffin; C13-14 Isoparaffin; Butylene Glycol	Carries the formula and sets initial slip and spread
Conditioning film	Dimethicone; Polyacrylamide; Laureth-7	Dimethicone forms the smoothing, frizz-reducing film; the polyacrylamide / laureth-7 pair is the classic emulsified gel network that suspends and stabilises it
Humectants and actives	Glycerin; Niacinamide; Panthenol; Ascorbyl Glucoside; hydrolysed wheat, corn and soy proteins	Water binding, barrier support and the marketed protein payload
Preservation and pH	Phenoxyethanol; Benzyl Alcohol; Citric Acid	Preservation and pH adjustment
Fragrance system	Nine declared allergens plus Parfum	The signature Nutritive scent

The official brand ingredient list publishes the same 29 entries in the same order as the merged list above, so there is no formula-version gap: this is a single, current formulation. Extract content is minimal - Iris Florentina Root Extract at position 25 is the only botanical extract in the formula.

4. Price Analysis

The US listing was captured with a New York delivery reference (ZIP 10001) and priced natively in USD - no conversion, no estimation. All long-run figures below come from a third-party Amazon price tracker that has monitored this product since 14 November 2023, roughly three years of history.

Current price

$64.00

Buy box, captured 2026-11-01

Subscribe & Save

$60.80

5% below the one-off price

Tracked average

$58.52

All-time, 3rd party new

Unit price

$21.05

Per fluid ounce, as listed

4.1 Live Listing Snapshot

Item	Value	Note
Current price	$64.00	Buy box with a New York 10001 delivery reference
List price	Not shown on the listing	The tracker records a $62.00 list price for the product
Subscribe & Save	$60.80	5% below the one-off price
Discount or coupon	None active	No percentage-off or coupon was rendered at capture
Unit price	$21.05 per fluid ounce	Amazon derives this from a unit count that is often hard-coded; the real figure for a 3.04 fl oz bottle is about $21.05, so the two agree here
Availability	In Stock	Free delivery quoted for Thursday, 5 November; same-day for Prime
Sold by	Kerastase	Brand-operated offer

4.2 Long-Run Price Record

Price type	Lowest ever	Highest ever	Current	Average
Amazon (sold and shipped by Amazon)	No data	No data	No data	No data
3rd party new	$49.60 (23 Jun 2026)	$64.00 (1 Sep 2026)	$64.00 (1 Sep 2026)	$58.52
3rd party used	No data	No data	No data	No data

Empty rows are a finding, not a gap. No first-party Amazon offer and no used-condition offer has ever been tracked for this product - it has been monitored exclusively through third-party new-condition marketplace sellers. Every figure in this table is all-time since 14 November 2023. Period-specific lows, highs and averages are not obtainable from this record: the chart-window control re-scales the chart only, and the summary block returns identical values at every window.

4.3 Price Level Comparison

Bar comparison of every price in the long-run record plus the list price. The current price sits level with the all-time high.

4.4 Position Against Benchmarks

Benchmark	Value	Current vs benchmark	Reading
Lowest ever	$49.60	+29.0%	Well above the floor
Highest ever	$64.00	0.0%	Exactly at the ceiling
Tracked average	$58.52	+9.4%	Moderately above the long-run mean
List price	$62.00	+3.2%	Small premium to list

4.5 Volatility and Timeline

Volatility measures

Metric	Value
Spread (high - low)	$14.40
Spread as a share of the low	29.0%
Dated extremes recorded	2 (one low, one high)
Tracked average vs list price	-5.6%
Monitoring window	14 Nov 2023 to 1 Nov 2026

A 29% spread over roughly three years is moderate for a prestige hair-care item, but the shape matters more than the width: only two dated extremes exist, and the ceiling is the current value. There is no recorded excursion above $64.00 and no return to the floor once the ceiling was set.

Timeline of dated extremes

Date	Event	Price
14 Nov 2023	Monitoring begins	Not recorded
23 Jun 2026	Lowest ever observed	$49.60
1 Sep 2026	Highest ever observed - and the current value	$64.00
1 Nov 2026	This capture	$64.00 (last observation, 61 days old)

The low and the high are about 70 days apart and both fall in 2026; nothing in the earlier two-plus years produced a dated extreme. The price movement on this item is concentrated in the recent window rather than spread across its history - though the record does not expose enough observations to say more than that.

Buy-timing read. The product is sitting at the highest price ever recorded. The tracked average of $58.52 is a credible reference level here - unusually, the extreme high is not a launch-date artefact, because it is dated nearly three years after monitoring began - so the current $64.00 is a genuine premium of about 9% to the long-run mean and about 29% to the observed floor. The single $49.60 observation in June 2026, never repeated, reads more like a short promotional event than a structural price level. Both statements are inferential. Note also that the tracked "current" value is 61 days old at capture; the live listing confirms $64.00, but the price should be re-verified before any transaction.

5. Positioning and Who It Suits

The case for it

Category standing. #2 in Hair Styling Serums and #1,027 in Beauty & Personal Care at capture - a genuine top-of-category position, not a niche listing.
Sentiment depth. 11,394 ratings at 4.6, with 89% at four stars or better and near-unanimous scores on softness (95%), shine (96%), non-greasy feel (92%) and lightweight feel (94%).
Coherent formula. The three marketed actives - niacinamide, the hydrolysed wheat/corn/soy protein trio, and glycerin - are all present, and the silicone-plus-volatile-solvent system explains the "doesn't weigh it down" feedback mechanically.
Claim compliance. Six of twelve tested claims pass, including paraben-free, sulfate-free, fungal-acne-safe and pore-clogger-free.
Brand-operated offer. Sold by Kerastase itself.

The case against it

Fragrance load. 11 of 29 entries are perfume or masking materials, including nine declarable EU allergens. All ten flagged ingredients are fragrance-related.
Price objection. Value for money is the only aspect below 50% positive (44%), and the item is currently at its all-time high - 9.4% above the tracked average and 29.0% above the observed floor.
Not a clean-label product. Not fragrance-free, not silicone-free, not alcohol-free, not vegan, not cruelty-free.
Synthetic colorants. CI 19140 and CI 14700 are present and unrated in the ingredient database.
Class-level warnings. Four concern flags, all traceable to the fragrance system or the silicone and humectant load.

Suitability guidance

Audience	Verdict	Basis
Dry to very dry hair wanting overnight conditioning, frizz reduction and shine	Good fit	Formulation intent matches; frizz control 80% and softness 95% positive
Buyers who enjoy a floral, salon-style fragrance	Good fit	Fragrance aspect 77% positive; scent is a marketed feature
Fragrance-sensitive or essential-oil-reactive users	Avoid	Nine declarable allergens including linalool, citronellol and limonene; overnight contact extends exposure
Contact dermatitis history on scalp or hairline	Caution	Four class-level concern flags, all fragrance or silicone driven
Silicone-free or fragrance-free seekers	Not suitable	Dimethicone at position 2; Parfum declared at position 29
Vegan or cruelty-free requirement	Not suitable	Both claims flagged as failing
Value-driven buyers	Consider timing	Current price is the all-time high; the tracked average is $58.52

6. Method, Confidence and Limitations

6.1 Confidence by Element

Element	Confidence	Basis
Title, brand, specifications, availability, sold-by	High	Read directly from the live US listing with a US delivery reference
Price, Subscribe & Save, unit price	High	Native USD from the live listing, no conversion
Rating, rating count, distribution	High	Published on the listing; buckets are rounded percentages
Aspect sentiment counts	High	Published aggregate, but not attributable to readable individual reviews
Merged ingredient list (29 entries)	High	Two independent dossiers agree name-for-name and order-for-order, and both match the official brand list
Claim matrix (12 badges)	High	Complete badge block captured; polarity read from the printed prefix
Safety, comedogenic and irritancy ratings	Medium	Community-aggregated reference data; most rows carry no comedogenic or irritancy value at all
Long-run price low / high / average	High	Verbatim from the tracking record
Current tracked price as a live quote	Low	61 days stale at capture; corroborated but not replaced by the live listing read
Individual buyer reviews	Not available	Zero inline reviews rendered on any page variant in this run
Buyer photos	Not available	The listing exposed no customer image tiles
Period-specific price statistics	Not available	The tracking record exposes all-time summary values only

6.2 Limitations

Snapshot, not a series. Every figure is a capture taken on 1 November 2026. Rank, price and rating counts move between captures.
No individual review text. The desktop listing, the mobile listing and the review-endpoint fallbacks all returned zero inline reviews, so Section 2 rests on published aggregates and aspect counts rather than on verbatim buyer quotes. No reviewer is named, handled or linked anywhere in this report.
No buyer photography. The listing exposed no customer image tiles. All imagery shown is listing-supplied and labelled as such.
All-time price only. The tracking record's summary block is identical at every chart window, so no 1-month, 3-month, 6-month or 1-year low, high or average can be produced. Nothing in Section 4 is a period statistic.
No observation-level price history. The record holds five values per price type, not a row-per-change table, so nothing can be said about how many times the price moved or how long it spent at any level.
Single tracked channel. Only third-party new carries data, so no first-party versus marketplace comparison, no marketplace premium and no parity assessment is possible.
Reference data, not regulation. Ingredient ratings come from community databases. They are reference material, not a compliance determination and not a substitute for a patch test.
Unrated is not safe. A dash in any ingredient column means no data. Twenty-five of 29 entries carry no comedogenic value and 25 carry no irritancy value.
Skin vocabulary on a hair product. Benefit and concern labels are generated by a skincare database. They describe ingredient classes, not product performance on hair.
Regional formula caveat. The official ingredient list used for cross-checking is the brand's regional site listing; the US listing does not publish a full INCI. Regional formulas can differ.

Analysis compiled 1 November 2026. Pricing is native USD captured against a New York (10001) delivery reference. Rank and price are live values and will move. Ingredient ratings are aggregated reference data and are not a regulatory or clinical determination.