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Side by side

Bumble and bumble Seaweed Nourishing Conditioner vs Redken Acidic Grow Full System Densifying Conditioner

95% function match · 9 of the 10 functions we compared match Formula overlap 54%. Bumble and bumble Seaweed Nourishing Conditioner and Redken Acidic Grow Full System Densifying 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.

  • Seaweed Nourishing Conditioner — protein-sensitive hair
  • Acidic Grow Full System Densifying Conditioner — 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
Bumble and bumble Seaweed Nourishing Conditioner — 6.7 oz container Bumble and bumble

Seaweed Nourishing Conditioner

  • Conditioner
  • Prestige
  • Sulfate-free
  • Silicone-free
Redken Acidic Grow Full System Densifying Conditioner — 10.1 oz container Redken

Acidic Grow Full System Densifying Conditioner

  • Conditioner
  • Salon
  • Sulfate-free
  • Silicone-free
Price, size & price per ounce
$38 6.7 oz · $5.67/oz
$32–37 10.1 oz · $3.46/oz
Value / price positioning
Same job for less elsewhere $$$$$ Prestige tier · costs more than 92% of the 689 conditioners we’ve priced
Same job for less elsewhere $$$$$ Salon tier · costs more than 78% 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
High Humectants near the top — water-binding is a headline mechanism here. Your hair
Moderate Humectants in the working part of the formula. Your hair
Oils and butters Same
Low Oils are present, but low enough to be a finishing touch. Your hair
Low Oils are present, but low enough to be a finishing touch. 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
Present Fragrance is listed; it sits below the working ingredients. 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
None Nothing here needs a detergent wash to remove. Your hair
None Nothing here needs a detergent wash to remove. Your hair
Clarifying wash needed
Moderate Your hair
Moderate Your hair
Hard-water defence Same
None No chelating agent in the list. Your hair
None No chelating agent 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
  • Protein-sensitive hairthat stiffens when protein is added
  • Maximum slipfor hair that tangles the moment it is wet
  • Dry, thirsty hairhumectants and emollients both sit up front
  • Curly-method routinesno sulfates and no water-insoluble silicones
  • 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
Why you might skip it
  • Scents bother youthis product carries a light scent
  • Hair that needs proteinthere is none in this list
  • Dry or very humid airwhere heavy humectants work against you
  • 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
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
Seaweed Nourishing
Acidic Grow Full
Where to buy
Ulta · Brand website · Sephora
Target · Ulta
Free of
  • sulfate-free
  • silicone-free
  • protein-free
  • curly-method compatible
  • sulfate-free
  • silicone-free
  • protein-free
  • curly-method compatible
Vegan
Vegan · label states
—
Cruelty-free
Cruelty-free · PETA-listed
Not cruelty-free · PETA-listed
Scent
Fresh & airy · Mint & herbalLight
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

IngredientSeaweed Nourishing ConditionerAcidic Grow Full System Densifying Conditioner
Water
Neutral
#1Leading
#1Leading
Cetearyl Alcohol
Softens
#2Leading
#2Leading
Stearamidopropyl Dimethylamine
Detangles
#5Supporting
#3Leading
Cetyl Esters
Softens
#7Supporting
#5Supporting
Fragrance
Fragrance
#29Below the 1% line
#7Below the 1% line
Limonene
Fragrance
#30Below the 1% line
#17Below the 1% line

What only one of them carries

Seaweed Nourishing Conditioner

Acidic Grow Full System Densifying Conditioner

Full ingredient list — Seaweed Nourishing Conditioner (37)
Full ingredient list — Acidic Grow Full System Densifying Conditioner (27)

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.

VerdictsSeaweed Nourishing ConditionerAcidic Grow Full System Densifying Conditioner
Supported
3
1
Partly supported
0
1
Stated by brand
1
3
Potential conflict
0
0

Seaweed Nourishing Conditioner

  • Balances scalp moisture and nurtures hair and scalpSupportedHelps hair feel hydrated.
  • Leaves hair feeling smooth and reduces frizzSupportedSmoother strands, less frizz.
  • Vegan formula made from 97% naturally derived ingredientsStated by brandOnly the brand’s testing shows this.
  • Safe for color-treated hairSupportedLess fade per wash.

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.

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.

Seaweed Nourishing Conditioner

The marine/botanical scent (kelp and algae notes) is repeatedly called fresh, subtle, and pleasant.

general reviewers

Several reviewers note it is safe for and works well on color-treated hair, and value the clean-ingredient positioning.

color-treated hair users

Reviewers with fine or wavy hair describe the conditioner as lightweight yet effectively hydrating, smoothing and detangling without weighing hair down.

fine/wavy hair

One reviewer notes the formula contains a silicone that gives shine and helps manage frizz, framing it as a meaningful ingredient callout rather than a complaint.

ingredient-aware reviewer

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

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.

$3.46/oz vs $5.67/oz — Bumble and bumble Seaweed Nourishing Conditioner costs about 1.6× more per ounce than Redken Acidic Grow Full System Densifying Conditioner.

$0.09/oz median $1.60/oz $56.25/oz $5.67/oz Seaweed Nourishing Conditi $3.46/oz Acidic Grow Full System De

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

Value readSeaweed Nourishing ConditionerAcidic Grow Full System Densifying Conditioner
Label
Same job for less elsewhereYou are paying above the range for a formula close to several lower-priced options.
Same job for less elsewhereYou are paying above the range for a formula close to several lower-priced options.

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.

Seaweed Nourishing Conditioner vs Superfoods Mango + Cherry Balancing ConditionerBriogeo · 100% function matchAcidic Grow Full System Densifying Conditioner vs Frizz Ease Dream Curls ConditionerJohn Frieda · 95% function matchSeaweed Nourishing Conditioner vs Buildup Balancing Hemp ACV ConditionerAcure · 100% function matchAcidic Grow Full System Densifying Conditioner vs Superfoods Mango + Cherry Balancing ConditionerBriogeo · 95% function matchSeaweed Nourishing Conditioner vs Superfoods Banana + Coconut Nourishing ConditionerBriogeo · 100% function matchAcidic Grow Full System Densifying Conditioner vs Frizz Dismiss Sulfate-Free ConditionerRedken · 95% function matchSeaweed Nourishing Conditioner vs Superfoods Kale + Apple Replenishing Superfood ConditionerBriogeo · 100% function matchAcidic Grow Full System Densifying Conditioner vs KILLER.CURLS RINSEKevin Murphy · 95% function match

Seaweed Nourishing Conditioner · Acidic Grow Full System Densifying 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.
  • 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.

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