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Side by side

CHI Deep Brilliance Shine Serum Lightweight Leave-In Treatment vs Hask Keratin Protein Smoothing Shine Hair Oil

90% function match · 8 of the 9 functions we compared match Formula overlap 52%. CHI Deep Brilliance Shine Serum Lightweight Leave-In Treatment and Hask Keratin Protein Smoothing Shine Hair Oil share 2 ingredients among each other's most prominent.

Based on your consultation

Which of these fits your hair?

We check your pattern, moisture need, scalp, fragrance tolerance, weight sensitivity and more against each formula — and say which one lines up.

Your profile at a glance

  • Your answers appear here
  • Your answers appear here
  • Your answers appear here
  • Your answers appear here

When each one is the right call

What each formula is built for, from its own ingredient list.

  • Deep Brilliance Shine Serum Lightweight Leave-In Treatment — dull-looking hair
  • Keratin Protein Smoothing Shine Hair Oil — protein-hungry hair

Side by side

Every trait, aligned

One row per trait, read from each product’s own ingredient list and record. A dash means we have not researched that field for that product — it is not a “no”.

Trait
CHI Deep Brilliance Shine Serum Lightweight Leave-In Treatment — 6 oz container CHI

Deep Brilliance Shine Serum Lightweight Leave-In Treatment

  • Finisher
  • Masstige
  • Sulfate-free
Hask Keratin Protein Smoothing Shine Hair Oil — container, alternate view Hask

Keratin Protein Smoothing Shine Hair Oil

  • Finisher
  • Value
Price, size & price per ounce
$16.78 6 oz · $2.80/oz
$2.39 5.8 oz · $0.41/oz
Value / price positioning
Lower cost than most serums $$$$$ Masstige tier · costs less than 79% of the 79 serums we’ve priced
Lower cost than most hair oils $$$$$ Value tier · costs less than 100% of the 175 hair oils we’ve priced
Best for hair types
All types Nothing in the formula or the claims narrows this to one pattern. Your hair
All types Nothing in the formula or the claims narrows this to one pattern. Your hair
Moisture level Same
Moderate Humectants in the working part of the formula. Your hair
Moderate Humectants in the working part of the formula. Your hair
Shine system Same
High A silicone or oil blend does the shine work here. Your hair
High A silicone or oil blend does the shine work here. Your hair
Slip / detangling
Some Some slip, mostly from esters or silicones rather than conditioners. Your hair
High Conditioning agents sit high in the list — this is a detangling formula. Your hair
Weight on hair
Medium Middle of the range — noticeable on fine hair, light on coarse hair. Your hair
—
Fragrance
Present Fragrance is listed; it sits below the working ingredients. Your hair
Present Fragrance is listed; it sits below the working ingredients. Your hair
Protein Differs
Minor Protein appears, low enough to be a supporting ingredient. Your hair
Prominent Protein high in the list — a strengthening formula, not a moisture one. Your hair
Silicone / wax buildup Same
High Water-insoluble silicones or waxes: a detergent wash is what removes them. Your hair
High Water-insoluble silicones or waxes: a detergent wash is what removes them. Your hair
Clarifying wash needed
Moderate Your hair
Moderate Your hair
Oils and butters Same
Present, high in the list Oils sit high in the list — a softening, coating formula. Your hair
Present, high in the list Oils sit high in the list — a softening, coating formula. Your hair
Fast-drying alcohol
None No fast-drying alcohol in the list. Your hair
—
Formula completeness
out of 10
Complete for its job
out of 10
Complete for its job
Who should choose this
  • Dull-looking haira recognised shine system is present
  • Very dry hairno fast-drying alcohol in the list
  • Sun and colour fadea UV filter is in the list
  • Aerosol avoidancea pump or tube, not a pressurised can
  • Protein-hungry hairthat stretches and stays stretched when wet
  • Maximum slipfor hair that tangles the moment it is wet
  • Dull-looking haira recognised shine system is present
  • Sun and colour fadea UV filter is in the list
Why you might skip it
  • Scents bother youthis product carries a scent
  • Curly-method routinesthese silicones need a detergent to remove
  • Scents bother youthis product carries a scent
  • Curly-method routinesthese silicones need a detergent to remove
  • Protein-sensitive hairthat goes stiff or straw-like on protein
from the formula stated by the brand reported by reviewers Scale: 1 dot low · 5 dots high, within this product type.
More facts about each one
Type
Finisherserum
Finisheroil
Where to buy
Brand website · Grocery / mass
Walmart · Amazon · Drugstore …
Free of
  • sulfate-free
—
Scent
Scented, not described
Scented, not described
Finish
—
shine
How often
—
as needed

Facts as we recorded them. A dash means we have not researched that field for that product — it is not a "no".

The bottom line

The bottom line depends on your hair

Which of these two suits you is a question about your hair, not about them. The consultation answers it — and tells you what your routine needs around it.

Take the consultation

$49.00 once, for your consultation and hair profile. No subscription, no required purchases.

The detail behind the table

Where the readings above come from: the ingredient lists themselves, each brand’s claims checked against them, what owners report, and cost per ounce in context.

Shared and distinct ingredients

Shared and distinct ingredients

Computed from the ingredient lists as printed. "Shared" means both lists carry it; where it sits on each label is stated, because position is what tells you how much.

What both formulas carry

IngredientDeep Brilliance Shine Serum Lightweight Leave-In TreatmentKeratin Protein Smoothing Shine Hair Oil
Cyclopentasiloxane
Buildup
#1Leading
#1Leading
Dimethiconol
Buildup
#2Leading
#2Leading
Fragrance
Fragrance
#27Below the 1% line
#25Below the 1% line
Linalool
Fragrance
#28Below the 1% line
#32Below the 1% line
Butylphenyl Methylpropional
Fragrance
#29Below the 1% line
#29Below the 1% line
Phenoxyethanol
Stabilizes
#24Below the 1% line
#23Below the 1% line

What only one of them carries

Deep Brilliance Shine Serum Lightweight Leave-In Treatment

Keratin Protein Smoothing Shine Hair Oil

Full ingredient list — Deep Brilliance Shine Serum Lightweight Leave-In Treatment (32)
Full ingredient list — Keratin Protein Smoothing Shine Hair Oil (32)

Claims check

What each brand says, against what each formula shows

Claims are quoted from each brand. We only mark one supported, partly supported, or conflicting when that product’s ingredient list actually speaks to it.

VerdictsDeep Brilliance Shine Serum Lightweight Leave-In TreatmentKeratin Protein Smoothing Shine Hair Oil
Supported
0
3
Partly supported
1
0
Stated by brand
0
5
Potential conflict
0
0

Deep Brilliance Shine Serum Lightweight Leave-In Treatment

  • Weightless leave-in treatment provides superior smoothness, manageability, and natural movement without buildupPartly supportedA little slip, not a lot.

Keratin Protein Smoothing Shine Hair Oil

  • incredible shine without oily residueSupportedReflects light for visible shine.
  • smooths frizzSupportedSmoother strands, less frizz.
  • sulfate-freeStated by brandCan’t be confirmed from label.
  • paraben-freeSupportedPreserved without parabens.
  • phthalate-freeStated by brandCan’t be confirmed from label.
  • gluten-freeStated by brandCan’t be confirmed from label.
  • color-safeStated by brandCan’t be confirmed from label.
  • cruelty-freeStated by brandWorth checking on the label.

What owners say

What people report

Recurring themes our researchers wrote in their own words from sourced reviews. We do not store or scrape star ratings, and we never balance one product’s themes against another’s by inventing them.

Deep Brilliance Shine Serum Lightweight Leave-In Treatment

No review themes researched for this product yet.

Keratin Protein Smoothing Shine Hair Oil

Used daily focused on the ends; absorbs quickly and doesn't leave a greasy residue, with a scent that lasts.

reviewer applying to hair ends

Effective at working out tangles and knots in dry, damaged hair.

reviewer with dry/damaged hair

Good value for the price, leaves hair smooth and shiny without weighing it down.

general reviewer

The scent is noticeable but not overpowering or long-lingering, the vial packaging is mess-free and easy to dose, and the oil feels light rather than greasy or heavy on hair.

general reviewer, retail product reviews

Price check

Cost per ounce, in context

Cost per ounce against every product of this type we have priced, each at the size it is most often sold in. Value labels are computed from that percentile and from how many products that do the same job cost less; they are comparisons, not judgements about a brand.

$0.41/oz vs $2.80/oz — CHI Deep Brilliance Shine Serum Lightweight Leave-In Treatment costs about 6.8× more per ounce than Hask Keratin Protein Smoothing Shine Hair Oil.

Deep Brilliance Shine Serum Lightweight Leave-In Treatment

Against 79 serums with a computable unit price.

Keratin Protein Smoothing Shine Hair Oil

Against 175 hair oils with a computable unit price.

Value readDeep Brilliance Shine Serum Lightweight Leave-In TreatmentKeratin Protein Smoothing Shine Hair Oil
Label
Lower cost than most serumsCosts less per ounce than most serums we have researched.
Lower cost than most hair oilsCosts less per ounce than most hair oils we have researched.

Computed from cost per ounce against every product of this type we have priced, and from how many products that do the same job cost less. It is a comparison, not a judgement about the brand.

Compare with something else

Close formulas to each of these, as their own comparison pages.

Deep Brilliance Shine Serum Lightweight Leave-In Treatment vs Verb Ghost OilVerb · 96% function matchKeratin Protein Smoothing Shine Hair Oil vs Gloss Gems Hair Oil Treatment Capsulesinh HAIR · 99% function matchDeep Brilliance Shine Serum Lightweight Leave-In Treatment vs Miracle Oil Plus KeratinIt's a 10 · 96% function matchKeratin Protein Smoothing Shine Hair Oil vs Hydrating OilNick Stenson Beauty · 95% function matchDeep Brilliance Shine Serum Lightweight Leave-In Treatment vs Gloss Gems Hair Oil Treatment Capsulesinh HAIR · 95% function matchKeratin Protein Smoothing Shine Hair Oil vs Crybaby Anti-Frizz Smoothing SerumIGK · 94% function matchDeep Brilliance Shine Serum Lightweight Leave-In Treatment vs Crybaby Anti-Frizz Smoothing SerumIGK · 94% function matchKeratin Protein Smoothing Shine Hair Oil vs Blonde Life Brilliant Glow Brightening OilJoico · 90% function match

Deep Brilliance Shine Serum Lightweight Leave-In Treatment · Keratin Protein Smoothing Shine Hair Oil · All serums in the library

How this page was made

  • This page is assembled from the same researched records the individual product pages render: identity, each ingredient list as printed, each brand's own claims, dated price observations, and review themes written in our researchers' own words. Nothing on it is written per comparison.
  • We do not rank these against each other. Which of them suits you depends on your hair, and that is what the consultation works out.
  • The formula similarity percentage is a stored, precomputed number: position-weighted overlap of the two ingredient lists blended with agreement on the attributes we derive. It measures how alike two formulas are, not how well either works.
  • 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.
  • 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.
  • 12 sources were consulted across the products on this page.
  • Ingredient order tells you relative amount only above roughly 1%. Prices are observations on the dates shown and change without notice. We do not sell these products and take no placement fees.
  • This is cosmetic information, not medical advice, and nothing here diagnoses or treats a health condition.

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