Side by side
K18 PEPTIDE PREP Detox Shampoo vs Nexxus Amino Bond Shampoo For Damaged
96% function match · 12 of the 13 functions we compared match Formula overlap 34%. K18 PEPTIDE PREP Detox Shampoo and Nexxus Amino Bond Shampoo For Damaged share 2 ingredients among each other's most prominent.
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.
- PEPTIDE PREP Detox Shampoo — colour-treated hair
- Amino Bond Shampoo For Damaged — 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”.
- Colour-treated hairthat fades faster in a sulfate wash
- Fast-oiling scalpsthat need a real reset wash
- Curly-method routinesno sulfates and no water-insoluble silicones
- Hard waterand swimmers dealing with mineral deposit
- Colour-treated hairthat fades faster in a sulfate wash
- Fast-oiling scalpsthat need a real reset wash
- Curly-method routinesno sulfates and no water-insoluble silicones
- Hard waterand swimmers dealing with mineral deposit
- Scents bother youthis product carries a scent
- Dry or damaged haira strong detergent system strips as it cleans
- Tight budgetsit sits in the upper price tiers
- Scents bother youthis product carries a scent
- Dry or damaged haira strong detergent system strips as it cleans
- Picking it up locallywe have it recorded in one channel only
More facts about each one
- sulfate-free
- silicone-free
- curly-method compatible
- sulfate-free
- silicone-free
- curly-method compatible
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.
$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
What only one of them carries
PEPTIDE PREP Detox Shampoo
Amino Bond Shampoo For Damaged
Full ingredient list — PEPTIDE PREP Detox Shampoo (24)
-
1
Water
- solvent
-
2
Sodium C14-16 Olefin Sulfonate
- olefin sulfonate cleanser
- cleanser
-
3
Cocamidopropyl Hydroxysultaine
- amphoteric cleanser
- secondary cleanser
- cleanser
-
4
Salicylic Acid
- active
- exfoliant
-
5
Charcoal Powder
- absorbent
- powder
-
6
SH-Oligopeptide-78
- protein
-
7
Panthenol
- humectant
- conditioning agent
- vitamin
-
8
Glycerin
- humectant
- Below about this point, order stops being meaningful — these are typically used at 1% or less.
-
9
Sodium Phytate
- hard-water chelator
-
10
Guar Hydroxypropyltrimonium Chloride
- conditioning agent
- polymer
- gum
-
11
Caprylyl Glycol
- preservative
- humectant
-
12
Caprylhydroxamic Acid
- preservative
- hard-water chelator
-
13
Citric Acid
- pH adjuster
- hard-water chelator
-
14
Potassium Hydroxide
- pH adjuster
-
15
Sodium Hydroxide
- pH adjuster
-
16
Sodium Chloride
- salt
- thickener
-
17
Fragrance
- fragrance
- declared fragrance
-
18
Benzyl Salicylate
- fragrance
- named fragrance allergen
-
19
Limonene
- fragrance
- named fragrance allergen
-
20
Hydroxycitronellal
- fragrance
- named fragrance allergen
-
21
Citrus Aurantium Dulcis Flower Oil
- botanical extract
- essential oil
- fragrance
-
22
Citrus Aurantium Peel Oil
- botanical extract
- essential oil
- fragrance
-
23
Citrus Limon (Lemon) Peel Oil
- botanical extract
- essential oil
- fragrance
-
24
Tetramethyl Acetyloctahydronaphthalenes
- fragrance
Full ingredient list — Amino Bond Shampoo For Damaged (26)
-
1
Water
- solvent
-
2
Sodium C14-16 Olefin Sulfonate
- olefin sulfonate cleanser
- cleanser
-
3
Cocamidopropyl Betaine
- amphoteric cleanser
- secondary cleanser
- cleanser
-
4
Sodium Chloride
- salt
- thickener
- Below about this point, order stops being meaningful — these are typically used at 1% or less.
-
5
Sodium Gluconate
- hard-water chelator
-
6
Glutamic Acid
- amino acid
- pH adjuster
-
7
Cysteine
- amino acid
-
8
Serine
- amino acid
-
9
Glycine
- amino acid
-
10
Histidine
- amino acid
-
11
Hydrolyzed Keratin
- film former
- protein
- hydrolysed protein
-
12
Collagen Amino Acids
- amino acid
- humectant
- protein
-
13
Hydrolyzed Elastin
- protein
- hydrolysed protein
-
14
Glycerin
- humectant
-
15
Fragrance
- fragrance
- declared fragrance
-
16
Citric Acid
- pH adjuster
- hard-water chelator
-
17
Glycol Distearate
- opacifier
- emollient
-
18
Sodium Benzoate
- preservative
-
19
Polyquaternium-10
- conditioning agent
- film former
- polymer
-
20
PPG-9
- humectant
- solvent
-
21
PEG-45m
- thickener
-
22
Propylene Glycol
- humectant
- solvent
-
23
Phenoxyethanol
- preservative
-
24
Hexyl Cinnamal
- fragrance
- named fragrance allergen
-
25
Yellow 5
- colourant
-
26
Red 33 (CI 17200)
- colourant
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.
PEPTIDE PREP Detox Shampoo
Deeply cleanses hair and scalp with a non-stripping, pH-optimized lather
Stated by brandCan’t be confirmed from label.Removes buildup without stripping color
SupportedResets a coated scalp.
Amino Bond Shampoo For Damaged
Helps repair up to 5 types of damage in minutes, rebuild broken bonds, and restore up to 2 years of protein loss
Partly supportedSupports the surface, not a treatment.2.7% HYDROLINK BONDER technology, Amino5 Complex, 96% less breakage
Stated by brandOnly the brand’s testing shows this.0% sulfates or silicones
Stated by brandOnly the brand’s testing shows this.
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.
Both praised for how it cleanses. Nexxus Amino Bond Shampoo For Damaged draws complaints about dryness and weight.
PEPTIDE PREP Detox Shampoo
Effectively removes product buildup and leaves scalp/hair feeling squeaky clean
general users, including some describing heavy stylers or hard water buildupDoes not strip color despite being a clarifying/detox formula
color-treated hair users, including blonde highlightsUsed as a prep step that reviewers feel improves absorption/results of the K18 leave-in mask afterward
multi-product K18 routine usersSome reviewers with fine or low-porosity hair report it is the first clarifying product that actually made a difference for them
fine/low-porosity hair reviewersAmino Bond Shampoo For Damaged
Reviewers frequently say it smells pleasant, lathers well and leaves hair feeling soft and healthy
Amazon verified purchasers, scent tagged in 30 of the AI-summarized review facetsSeveral reviewers with thinning or falling-out hair reported their hair became fuller and shed less after switching to this shampoo
reviewers describing prior hair loss or thinningOne reviewer with dry, chemically damaged hair found the effect plateaued over time, the lather was thin, and it built up a waxy layer requiring a clarifying shampoo
a reviewer with dry, color-treated/bleached hairA number of reviewers say it leaves hair greasy or oily at the roots, and hair condition feedback is mixed
retailer-generated review summary, greasiness tagged in 19 of the AI-summarized facetsPrice 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.
$4.14/oz vs $4.53/oz — within about the same cost per ounce.
Every mark sits on one distribution because these are compared against the same set: 835 shampoos with a computable unit price.
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.
PEPTIDE PREP Detox Shampoo · Amino Bond Shampoo For Damaged · 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.
- 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
