Skip to main content

Side by side

amika Glass Action Universal Elixir vs Biolage Smooth Proof Hair Serum for Anti-Frizz and Hair Shine

96% function match · 11 of the 12 functions we compared match Formula overlap 41%. amika Glass Action Universal Elixir and Biolage Smooth Proof Hair Serum for Anti-Frizz and Hair Shine share 1 ingredient 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.

  • Glass Action Universal Elixir — protein-sensitive hair
  • Smooth Proof Hair Serum for Anti-Frizz and Hair Shine — protein-sensitive 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
amika Glass Action Universal Elixir — 1.7 oz container amika

Glass Action Universal Elixir

  • Finisher
  • Salon
  • Sulfate-free
  • Protein-free
Biolage Smooth Proof Hair Serum for Anti-Frizz and Hair Shine — 3.4 oz container Biolage

Smooth Proof Hair Serum for Anti-Frizz and Hair Shine

  • Finisher
  • Salon
  • Sulfate-free
  • Protein-free
Price, size & price per ounce
$27.95 1.7 oz · $17.04/oz
$27–28 3.4 oz · $7.94/oz
Value / price positioning
Same job for less elsewhere $$$$$ Salon tier · costs more than 76% of the 175 hair oils we’ve priced
Priced with its peers $$$$$ Salon tier · costs less than 55% of the 79 serums we’ve priced
Best for hair types
Curly–Coily A heavy formula: coarse, curlier strands carry it without flattening. 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
Some Some slip, mostly from esters or silicones rather than conditioners. Your hair
Weight on hair Differs
Rich Heavy butters and waxes in the first eight ingredients. Your hair
Medium Middle of the range — noticeable on fine hair, light on coarse hair. Your hair
Fragrance
Prominent Fragrance sits in the first eight ingredients — a larger share of the formula. Your hair
Prominent Fragrance sits in the first eight ingredients — a larger share of the formula. Your hair
Protein Same
None No protein or amino acids in the list. Your hair
None No protein or amino acids in the list. 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 Same
None No fast-drying alcohol in the list. Your hair
None No fast-drying alcohol in the list. Your hair
Humidity resistance
—
Claimed The brand claims humidity resistance; the ingredient list cannot confirm it. Your hair
Formula completeness
out of 10
Covers the core
out of 10
Complete for its job
Who should choose this
  • Protein-sensitive hairthat stiffens when protein is added
  • Dry, thirsty hairhumectants and emollients both sit up front
  • Coarse or dry hairthat absorbs everything you give it
  • Dull-looking haira recognised shine system is present
  • Protein-sensitive hairthat stiffens when protein is added
  • Dry, thirsty hairhumectants and emollients both sit up front
  • Dull-looking haira recognised shine system is present
  • Humid climatesthe brand claims humidity resistance
Why you might skip it
  • Scents bother youthis product carries a scent
  • Curly-method routinesthese silicones need a detergent to remove
  • Oily scalp or fine hairthat gets weighed down
  • Scents bother youthis product carries a scent
  • Curly-method routinesthese silicones need a detergent to remove
  • Tight budgetsit sits in the upper price tiers
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
Finisheroil
Finisherserum
Where to buy
Brand website · Walmart · Salons
Ulta · Brand website · Planet Beauty …
Free of
  • sulfate-free
  • protein-free
  • sulfate-free
  • protein-free
Cruelty-free
Cruelty-free · PETA-listed
—
Scent
Scented, not described
Scented, not described
Finish
shine
—
Humidity claim
—
Yes
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

IngredientGlass Action Universal ElixirSmooth Proof Hair Serum for Anti-Frizz and Hair Shine
Dimethicone
Buildup
#1Leading
#2Leading
Fragrance
Fragrance
#4Below the 1% line
#4Below the 1% line
Limonene
Fragrance
#10Below the 1% line
#5Below the 1% line
Hydroxycitronellal
Fragrance
#11Below the 1% line
#16Below the 1% line

What only one of them carries

Glass Action Universal Elixir

Smooth Proof Hair Serum for Anti-Frizz and Hair Shine

Full ingredient list — Glass Action Universal Elixir (13)
Full ingredient list — Smooth Proof Hair Serum for Anti-Frizz and Hair Shine (20)

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.

VerdictsGlass Action Universal ElixirSmooth Proof Hair Serum for Anti-Frizz and Hair Shine
Supported
1
0
Partly supported
0
0
Stated by brand
3
0
Potential conflict
0
0

Glass Action Universal Elixir

  • fortifies, elasticizes, adds shine, stops frizzStated by brandCan’t be confirmed from label.
  • highest concentration of amika's signature sea buckthorn ingredientStated by brandCan’t be confirmed from label.
  • safe for color-treated, Brazilian-treated, and keratin-treated hairSupportedLess fade per wash.
  • sulfate-, sodium chloride-, paraben-, and artificial-color-freeStated by brandCan’t be confirmed from label.

Smooth Proof Hair Serum for Anti-Frizz and Hair Shine

No claims recorded for this product beyond the ones above.

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.

Biolage Smooth Proof Hair Serum for Anti-Frizz and Hair Shine draws complaints about dryness and the price.

Glass Action Universal Elixir

Leaves hair feeling smoother, shinier, and hydrated without a heavy or greasy feel

Influenster reviewer

Adds visible shine without making hair look oily or weighed down

Influenster reviewer

Noticeably cuts down frizz and flyaways after use

Influenster reviewer

Smooth Proof Hair Serum for Anti-Frizz and Hair Shine

Makes hair soft, silky and smooth, general brand loyalty

Underwhelmed given the price point

Texture is thin/runny and left hair feeling dry

Longtime user reports the formula changed and dislikes the new version

reformulation complaint

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.

$7.94/oz vs $17.04/oz — amika Glass Action Universal Elixir costs about 2.1× more per ounce than Biolage Smooth Proof Hair Serum for Anti-Frizz and Hair Shine.

Glass Action Universal Elixir

Against 175 hair oils with a computable unit price.

Smooth Proof Hair Serum for Anti-Frizz and Hair Shine

Against 79 serums with a computable unit price.

Value readGlass Action Universal ElixirSmooth Proof Hair Serum for Anti-Frizz and Hair Shine
Label
Same job for less elsewhereYou are paying above the range for a formula close to several lower-priced options.
Priced with its peersSits in the middle of the range for serums per ounce.

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.

Glass Action Universal Elixir vs Osmanthus Perfumed Hair OilLADOR · 99% function matchSmooth Proof Hair Serum for Anti-Frizz and Hair Shine vs No.7 Bonding Hair OilOLAPLEX · 100% function matchGlass Action Universal Elixir vs Like A Virgin Miracle Hair ElixirCoco & Eve · 99% function matchSmooth Proof Hair Serum for Anti-Frizz and Hair Shine vs Glimmer Shine SprayMoroccanoil · 100% function matchGlass Action Universal Elixir vs Monoi Coconut Oil Nourishing Shine Hair OilHask · 99% function matchSmooth Proof Hair Serum for Anti-Frizz and Hair Shine vs Club Lights Clear Gloss Style PerfectorIGK · 96% function matchGlass Action Universal Elixir vs Glimmer Shine SprayMoroccanoil · 96% function matchSmooth Proof Hair Serum for Anti-Frizz and Hair Shine vs Caviar Anti-Aging Smoothing Anti-Frizz Dry Oil MistAlterna · 96% function match

Glass Action Universal Elixir · Smooth Proof Hair Serum for Anti-Frizz and Hair Shine · All hair oils 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.
  • 7 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.

Still unsure? Take your consultation or browse more products.

Your personalized hair plan

Tell us what’s going on with your hair, see what we understand, and get a plan built around it — with the reason behind every recommendation.

Free to start · $49.00 for your consultation and hair profile · No subscription · Nothing you must buy

Start your consultation