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Side by side

Redken Acidic Grow Full System Densifying Conditioner vs Redken Extreme Conditioner

55% function match · 4 of the 10 functions we compared match Formula overlap 57%. Redken Acidic Grow Full System Densifying Conditioner and Redken Extreme Conditioner share 3 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.

  • Acidic Grow Full System Densifying Conditioner — protein-sensitive hair
  • Extreme Conditioner — maximum slip

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
Redken Acidic Grow Full System Densifying Conditioner — 10.1 oz container Redken

Acidic Grow Full System Densifying Conditioner

  • Conditioner
  • Salon
  • Sulfate-free
  • Silicone-free
Redken Extreme Conditioner — 10.1 oz container Redken

Extreme Conditioner

  • Conditioner
  • Salon
  • Sulfate-free
  • Moisture-rich
Price, size & price per ounce
$32–37 10.1 oz · $3.46/oz
$25–29 10.1 oz · $2.60/oz
Value / price positioning
Same job for less elsewhere $$$$$ Salon tier · costs more than 78% of the 689 conditioners we’ve priced
Upper-mid price for a conditioner $$$$$ Salon tier · costs more than 67% of the 689 conditioners 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 Differs
Moderate Humectants in the working part of the formula. Your hair
High Humectants near the top — water-binding is a headline mechanism here. Your hair
Oils and butters Differs
Low Oils are present, but low enough to be a finishing touch. Your hair
None No oils or butters in the list. Your hair
Slip / detangling Same
High Conditioning agents sit high in the list — this is a detangling formula. Your hair
High Conditioning agents sit high in the list — this is a detangling formula. Your hair
Weight on hair Same
Medium Middle of the range — noticeable on fine hair, light on coarse hair. 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
Present Fragrance is listed; it sits below the working ingredients. Your hair
Protein Differs
None No protein or amino acids in the list. Your hair
Minor Protein appears, low enough to be a supporting ingredient. Your hair
Silicone / wax buildup Differs
None Nothing here needs a detergent wash to remove. Your hair
High Water-insoluble silicones or waxes: a detergent wash is what removes them. Your hair
Clarifying wash needed
Moderate Your hair
High Your hair
Hard-water defence Differs
None No chelating agent in the list. Your hair
Chelators present Chelators are present — they bind hard-water and pool minerals. Your hair
Formula completeness
out of 10
Complete for its job
out of 10
Complete for its job
Who should choose this
  • Protein-sensitive hairthat stiffens when protein is added
  • Maximum slipfor hair that tangles the moment it is wet
  • Curly-method routinesno sulfates and no water-insoluble silicones
  • Silicone-free routinesno silicones appear in the list
  • Maximum slipfor hair that tangles the moment it is wet
  • Dry, thirsty hairhumectants and emollients both sit up front
  • Porous, damaged hairceramides are in the list
  • Cuticle-smoothing pHa pH adjuster brings it to the acidic range hair prefers
Why you might skip it
  • Scents bother youthis product carries a scent
  • Hair that needs proteinthere is none in this list
  • Vegan and cruelty-freeour record does not support both claims here
  • Scents bother youthis product carries a scent
  • Curly-method routinesthese silicones need a detergent to remove
  • Very dry or damaged hairit contains fast-drying alcohol
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
Conditioner
Conditioner
Line
Acidic Grow Full
Extreme
Where to buy
Target · Ulta
Ulta · Salons
Free of
  • sulfate-free
  • silicone-free
  • protein-free
  • curly-method compatible
  • sulfate-free
Cruelty-free
Not cruelty-free · PETA-listed
Not cruelty-free · PETA-listed
Scent
Scented, not described
Scented, not described

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

IngredientAcidic Grow Full System Densifying ConditionerExtreme Conditioner
Water
Neutral
#1Leading
#1Leading
Cetearyl Alcohol
Softens
#2Leading
#2Leading
Isopropyl Myristate
Softens
#4Supporting
#6Supporting
Cetyl Esters
Softens
#5Supporting
#5Supporting
Fragrance
Fragrance
#7Below the 1% line
#9Below the 1% line
Phenoxyethanol
Stabilizes
#26Below the 1% line
#8Below the 1% line

What only one of them carries

Acidic Grow Full System Densifying Conditioner

Extreme Conditioner

Full ingredient list — Acidic Grow Full System Densifying Conditioner (27)
Full ingredient list — Extreme Conditioner (30)

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.

VerdictsAcidic Grow Full System Densifying ConditionerExtreme Conditioner
Supported
1
1
Partly supported
1
1
Stated by brand
3
1
Potential conflict
0
0

Acidic Grow Full System Densifying Conditioner

  • Nourishes without weightPartly supportedSome hydration, at a low level.
  • Fast-rinsing formulaStated by brandCan’t be confirmed from label.
  • Strengthens fragile strandsStated by brandCan’t be confirmed from label.
  • Adds visible fullnessStated by brandCan’t be confirmed from label.
  • Smooths and detanglesSupportedEasier detangling, less breakage.

Extreme Conditioner

  • Detangles, strengthens, and protects distressed, brittle hairPartly supportedSupports the surface, not a treatment.
  • Leaves hair healthy, nourished, and resilient against hair damageSupportedHelps hair feel hydrated.
  • For all hair types and all types of damageStated by brandSee the fit panel instead.

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.

Redken Acidic Grow Full System Densifying Conditioner draws complaints about the scent and volume.

Acidic Grow Full System Densifying Conditioner

Reviewers with fine hair describe the formula as lightweight, not heavy on the scalp, and longer-lasting per use than their usual conditioner

fine hair

Some reviewers found it added little to no noticeable softness or fullness, calling it a generic-feeling conditioner despite a pleasant scent

general users

A subset of reviewers report increased hair breakage or a rough/sandpaper-like texture after using the paired shampoo+conditioner system

general users, some noting a stylist flagged visible breakage

Reviewers who used the full system for several weeks report modestly thicker-feeling hair, though some wanted more volume than delivered

fine/thinning hair, multi-week users

Extreme Conditioner

Long-term users report the conditioner (paired with Extreme Shampoo) reduces breakage and leaves hair visibly thicker over months of consistent use

multi-year repeat buyers

Reviewers describe hair feeling healthy, soft, and manageable after use

Reviewers with grey/silver or color-treated hair report noticeable frizz control and improved texture compared to higher-end brands they tried

natural grey/silver hair

Some reviewers say results reversed after switching away from the product for a few months, then returned once they resumed use

previously damaged/breaking hair

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.

$2.60/oz vs $3.46/oz — Redken Acidic Grow Full System Densifying Conditioner costs about 1.3× more per ounce than Redken Extreme Conditioner.

$0.09/oz median $1.60/oz $56.25/oz $3.46/oz Acidic Grow Full System De $2.60/oz Extreme Conditioner

Every mark sits on one distribution because these are compared against the same set: 689 conditioners with a computable unit price.

Value readAcidic Grow Full System Densifying ConditionerExtreme Conditioner
Label
Same job for less elsewhereYou are paying above the range for a formula close to several lower-priced options.
Upper-mid price for a conditionerSits in the middle of the range for conditioners 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.

Acidic Grow Full System Densifying Conditioner vs Frizz Ease Dream Curls ConditionerJohn Frieda · 95% function matchExtreme Conditioner vs L'Oreal Paris Elvive Color Vibrancy Protecting Conditioner with Anti-OxidantsL'Oreal Paris Elvive · 100% function matchAcidic Grow Full System Densifying Conditioner vs Seaweed Nourishing ConditionerBumble and bumble · 95% function matchExtreme Conditioner vs Dove Beauty Derma Scalp Density Boost ConditionerDove · 95% function matchAcidic Grow Full System Densifying Conditioner vs Superfoods Mango + Cherry Balancing ConditionerBriogeo · 95% function matchExtreme Conditioner vs Oat Milk Blend Daily Moisture ConditionerAveeno · 95% function matchAcidic Grow Full System Densifying Conditioner vs Frizz Dismiss Sulfate-Free ConditionerRedken · 95% function matchExtreme Conditioner vs Agave & Lavender Moisturizing & Detangling ConditionerDesign Essentials · 95% function match

Acidic Grow Full System Densifying Conditioner · Extreme Conditioner · All conditioners 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.
  • 8 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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