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Side by side

Function of Beauty Straight Hair Shampoo vs Matrix Instacure Build-A-Bond Mighty Bonds Shampoo

94% function match · 11 of the 13 functions we compared match Formula overlap 9%. Function of Beauty Straight Hair Shampoo and Matrix Instacure Build-A-Bond Mighty Bonds Shampoo 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.

  • Straight Hair Shampoo — colour-treated hair
  • Instacure Build-A-Bond Mighty Bonds Shampoo — colour-treated 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
Function of Beauty Straight Hair Shampoo — 11 oz container Function of Beauty

Straight Hair Shampoo

  • Shampoo
  • Drugstore
  • Sulfate-free
  • Protein-free
Matrix Instacure Build-A-Bond Mighty Bonds Shampoo — 10.1 oz container Matrix

Instacure Build-A-Bond Mighty Bonds Shampoo

  • Shampoo
  • Salon
  • Sulfate-free
  • Protein-free
Price, size & price per ounce
$9.97 11 oz · $0.94/oz
$10 10.1 oz · $1.53/oz
Value / price positioning
Priced with its peers $$$$$ Drugstore tier · costs less than 69% of the 817 shampoos we’ve priced
Upper-mid price for a shampoo $$$$$ Salon tier · costs more than 51% of the 817 shampoos 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
Cleansing strength Same
Moderate Removes oil and product; leaves some conditioning behind. Your hair
Moderate Removes oil and product; leaves some conditioning behind. Your hair
Slip / detangling Same
Moderate Conditioning agents are present, lower in the list. Your hair
Moderate Conditioning agents are present, lower in the list. Your hair
Weight on hair
Light Water-first and light: unlikely to flatten fine hair. Your hair
Light Water-first and light: unlikely to flatten fine 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
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
Expected lather Same
Moderate An ordinary shampoo lather. Your hair
Moderate An ordinary shampoo lather. Your hair
Scalp active Same
None No over-the-counter scalp active. Your hair
None No over-the-counter scalp active. Your hair
Hard-water defence Same
Chelators present Chelators are present — they bind hard-water and pool minerals. 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
  • Colour-treated hairthat fades faster in a sulfate wash
  • Protein-sensitive hairthat stiffens when protein is added
  • Hard waterand swimmers dealing with mineral deposit
  • Fine hairthat flattens under most products
  • Colour-treated hairthat fades faster in a sulfate wash
  • Protein-sensitive hairthat stiffens when protein is added
  • Hard waterand swimmers dealing with mineral deposit
  • Fine hairthat flattens under most products
Why you might skip it
  • Scents bother youthis product carries a scent
  • Curly-method routinesthese silicones need a detergent to remove
  • Hair that needs proteinthere is none in this list
  • 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
Shampoo
Shampoo
Line
Straight Hair
—
Where to buy
Brand website · Target
Salons · Ulta
Free of
  • sulfate-free
  • protein-free
  • sulfate-free
  • protein-free
Vegan
Vegan · label states
Vegan · label states
Cruelty-free
Cruelty-free · PETA-listed
Not cruelty-free · PETA-listed
Scent
Sweet & vanilla · Fresh & airy
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

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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

IngredientStraight Hair ShampooInstacure Build-A-Bond Mighty Bonds Shampoo
Water
Neutral
#1Leading
#1Leading
Glycerin
Moisturizes
#3Leading
#9Below the 1% line
Citric Acid
pH balancer
#30Below the 1% line
#5Below the 1% line
Fragrance
Fragrance
#31Below the 1% line
#8Below the 1% line
Sodium Benzoate
Stabilizes
#28Below the 1% line
#13Below the 1% line
Limonene
Fragrance
#34Below the 1% line
#18Below the 1% line

What only one of them carries

Straight Hair Shampoo

Instacure Build-A-Bond Mighty Bonds Shampoo

Full ingredient list — Straight Hair Shampoo (37)
Full ingredient list — Instacure Build-A-Bond Mighty Bonds Shampoo (34)

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.

VerdictsStraight Hair ShampooInstacure Build-A-Bond Mighty Bonds Shampoo
Supported
0
2
Partly supported
0
0
Stated by brand
2
2
Potential conflict
0
0

Straight Hair Shampoo

  • 93% naturally-derivedStated by brandOnly the brand’s testing shows this.
  • Sulfate-free, paraben-free, cruelty-free, 100% veganStated by brandOnly the brand’s testing shows this.

Instacure Build-A-Bond Mighty Bonds Shampoo

  • 83% say hair feels immediately revived after 1 useStated by brandOnly the brand’s testing shows this.
  • Free from sulfates, parabens and mineral oilSupportedGentler on colour and coils.
  • Vegan formulaSupportedMatches our researched record.
  • Luxurious texture for a rich latherStated by brandSubjective feel varies by hair.

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.

Function of Beauty Straight Hair Shampoo draws complaints about dryness and breakage; Matrix Instacure Build-A-Bond Mighty Bonds Shampoo draws complaints about the scent and curl definition.

Straight Hair Shampoo

Reviewers with sensitive skin/scalp report the formula worked well for them

sensitive-skin reviewers

Softness and shine without heavy product buildup are frequently praised

Some reviewers report dryness and brittleness despite the sulfate-free formulation

Scalp irritation and itching are mentioned by a subset of reviewers

A cluster of reviewers report significant hair loss and breakage after regular use

Instacure Build-A-Bond Mighty Bonds Shampoo

Reviewers with fine hair say it does not weigh hair down while still feeling hydrating, compared favorably to Pureology Strength Cure

fine hair

Reviewers using it regularly on roots/scalp report hair feels stronger and less prone to breakage after a few washes, with a rich lather

used 2-3x/week focused on roots

Some reviewers report hair shedding/falling out in clumps after starting to use the shampoo, despite low heat styling

isolated but described as severe

Reviewers report the shampoo dried their hair out and left a strong/off-putting chemical scent

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.

$0.94/oz vs $1.53/oz — Matrix Instacure Build-A-Bond Mighty Bonds Shampoo costs about 1.6× more per ounce than Function of Beauty Straight Hair Shampoo.

$0.00/oz median $1.48/oz $17.29/oz $0.94/oz Straight Hair Shampoo $1.53/oz Instacure Build-A-Bond Mig

Every mark sits on one distribution because these are compared against the same set: 817 shampoos with a computable unit price.

Value readStraight Hair ShampooInstacure Build-A-Bond Mighty Bonds Shampoo
Label
Priced with its peersSits in the middle of the range for shampoos per ounce.
Upper-mid price for a shampooSits in the middle of the range for shampoos 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.

Straight Hair Shampoo vs Acidic Bonding Concentrate ShampooRedken · 94% function matchInstacure Build-A-Bond Mighty Bonds Shampoo vs Acidic Bonding Concentrate ShampooRedken · 100% function matchStraight Hair Shampoo vs Bond-Building Repair ShampooBumble and bumble · 94% function matchInstacure Build-A-Bond Mighty Bonds Shampoo vs Legendary ShampooIGK Hair · 96% function matchStraight Hair Shampoo vs Damage Remedy Restructuring ShampooAveda · 94% function matchInstacure Build-A-Bond Mighty Bonds Shampoo vs Bond Rx ShampooPaul Mitchell · 96% function matchStraight Hair Shampoo vs Forget Frizz Anti-Frizz Shampooamika · 94% function matchInstacure Build-A-Bond Mighty Bonds Shampoo vs Nutrient Blends Sulfate-Free Miracle Moisture Rose Water ShampooPantene · 94% function match

Straight Hair Shampoo · Instacure Build-A-Bond Mighty Bonds Shampoo · All shampoos 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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