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CHI

BioSilk Color Therapy Lock and Protect

Leave-in / Everyday leave-in, medium-weight

Leave-in
cream
Sulfate-free
Moisture-rich
Not vegan · ingredient list

Size5.64 fl oz

Price$11.99seen at one store · 5.64 oz

Price / oz$2.13/ozat 5.64 oz

Where to buy1 store · $11.99–11.99

Scent:

The ingredient list declares fragrance. What it smells of is not stated, and we do not guess.

Manufacturer page: imagebeauty.com

Personal fit

Is this right for you?

Factor Your profile Fit

Best for hair types All types Not in your profile

Moisture level High Not in your profile

Oils and butters Moderate Not in your profile

Slip / detangling Moderate Not in your profile

Weight on hair Medium Not in your profile

Fragrance Present Not in your profile

Protein Prominent Not in your profile

Silicone / wax buildup High Not in your profile

Clarifying wash needed Moderate Not in your profile

Parabens / preservatives None of these listed Not in your profile

Show all 21 factors we check

The rest of what your plan weighs on this product.

Essential oils None listed Not in your profile

Fast-drying alcohol None Not in your profile

Vegan / cruelty-free Not vegan · ingredient list Not in your profile

Animal-derived ingredients Not vegan · ingredient list Not in your profile

Heavy humectants Heavy Not in your profile

Hard-water defence High Not in your profile

UV filter None listed Not in your profile

pH adjusted Adjusted Not in your profile

Ingredient list 36 ingredientsA long list Not in your profile

Price tier Drugstore Not in your profile

Where to buy it Brand website · Specialty beauty Not in your profile

The consultation builds your hair profile, then reads every factor in this table against it — and tells you where this product fits, or what to use instead.

Start your consultation

$49.00 once, for your consultation and hair profile. No subscription, no required purchases.

Upper-mid price for a leave-in

$2.13/oz at 5.64 oz — more than 50% of the 477 leave-ins , which mostly run $1.17–5.50/oz. The cost less.

Price and stores

Great for

Protein-hungry hairthat stretches and stays stretched when wet

Dry, thirsty hairhumectants and emollients both sit up front

Curl definitionfilm formers hold a clump together

Very dry hairno fast-drying alcohol in the list

Cuticle-smoothing pHa pH adjuster brings it to the acidic range hair prefers

A wide range of haira middle-of-the-range weight

Maybe skip if

this product carries a scent

Curly-method routinesthese silicones need a detergent to remove

Protein-sensitive hairthat goes stiff or straw-like on protein

Dry or very humid airwhere heavy humectants work against you

Vegan and cruelty-freeour record does not support both claims here

Whether this weight sits well on your hair depends on density, porosity, and how much you already layer — that is what the consultation works out.

What the formula actually does

Read from the label, not the marketing

Each row says where it comes from: F means we derived it from this product’s own ingredient list, S means it is a claim the brand makes that the formula neither confirms nor contradicts.

Weight on the hair Medium

Middle of the range — noticeable on fine hair, light on coarse hair.

Slip and detangling Moderate

Conditioning agents are present, lower in the list.

Water-binding (humectants) High

Humectants near the top — water-binding is a headline mechanism here.

Oils and butters Present, high in the list

Oils sit high in the list — a softening, coating formula.

Protein Prominent

Protein high in the list — a strengthening formula, not a moisture one.

Needs detergent to remove Yes

Water-insoluble silicones or waxes: a detergent wash is what removes them.

Fragrance Present

Fragrance is listed; it sits below the working ingredients.

from the formula stated by the brand reported by reviewers Scale: 1 dot low · 5 dots high, within this product type.

Ingredients that matter

The ingredients that change a decision

The workhorse ingredients plus anything lower down that changes a decision. These chips name what an ingredient does — they are not safety scores, and no ingredient here is rated good or bad on its own.

Ingredient	What it does	Why it matters	Chip
WaterAqua/Water/Eau	solvent	The base everything else is dissolved in	Neutral
Dimethicone	silicone	Smooths the cuticle and adds shine	Buildup
C15-19 Alkane	emollient	Softens and smooths the strand	Softens
Glycerin	humectant	Pulls water into the hair	Moisturizes
Hydrolyzed Silk	film former	Lays down the film that holds a shape	Protein
Ribes Grossularia Fruit Extract	botanical extract	A plant extract, marketed as much as functional	Neutral
Phyllostachis Bambusoides Extract	botanical extract	A plant extract, marketed as much as functional	Neutral
Argania Spinosa Kernel Oil	oil	Coats and softens the strand	Softens
Amodimethicone	silicone	A little smoothing and shine	Buildup
Dimethiconol	silicone	A little smoothing and shine	Buildup
Cyclopentasiloxane	silicone	A little smoothing and shine	Buildup
FragranceFragrance (Parfum)	fragrance	The scent	Fragrance

What the list leaves out, and what it carriesNo sulfates or drying alcohols. Protein-forward — a strengthening formula, not a moisture one. Contains fragrance. The silicones here need a detergent wash to come off.

Full ingredient list (36)

US labelling rules put ingredients above 1% in descending order of amount; below 1% they may be listed in any order. Annotations keep three readings separate: the ingredient's general function, its role in this product type, and what its position can support.

1 Water · Aqua/Water/Eau

General function
The base of almost every rinse-off and cream hair product. It carries everything else and is normally the first ingredient on the label.

Leading ingredient
Listed in the first three ingredients, it is likely a structural part of this formula.
- solvent
2 Dimethicone

General function
The most common conditioning silicone. It coats the strand for shine, slip, and frizz control, and needs a detergent (not just water) to wash out.

Leading ingredient
Listed in the first three ingredients, it is likely a structural part of this formula.

May suitClimate-sensitive or frizz-prone hair
A surface film slows how quickly humidity reaches the cortex, which is what limits swelling-driven frizz in damp air.

May suitFrizz-prone, damaged, or high-friction hair
Lays a smooth film along the cuticle, which lowers combing friction and flattens the surface irregularities that read as frizz.

May not suitBuild-up-sensitive routines
Dimethicone does not disperse in water. On a routine that skips detergent it stays on the hair and accumulates wash after wash.
- silicone
- emollient
- conditioning agent
3 C15-19 Alkane

General function
A plant-derived light alkane used as a clean-feeling silicone alternative.

Leading ingredient
Listed in the first three ingredients, it is likely a structural part of this formula.

May suitFrizz-prone, damaged, or high-friction hair
Emollients fill and smooth the surface of the strand, which lowers the friction that lifts the cuticle and reads as roughness.
- emollient
- solvent
4 Glycerin

General function
A small water-loving molecule that draws moisture into the hair and holds it there. It is the most common softening ingredient in conditioners and leave-ins.

Supporting ingredient
Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.

May suitDry, coarse, or high-porosity hair
High-porosity hair loses water fast; a humectant holds some of it in place for longer than the wash itself would.

May suitVery dry or highly damaged hair
Binds water into the outer layers of the strand, and water is what makes dry hair flexible again rather than brittle.

DependsClimate-sensitive or frizz-prone hair
Water moves both ways. Measured across concentrations, glycerin solutions give water up in some conditions and take it from the air in others. What it does for you depends on how much of it is there and on the air around it.

Scientific Reports
- humectant
5 Hydrolyzed Silk

General function
A light protein used for slip and shine rather than strength.

Supporting ingredient
Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.

May suitFrizz-prone, damaged, or high-friction hair
Filling surface gaps evens out the cuticle, which is part of what makes damaged hair comb and reflect light more like undamaged hair.

May suitMaximum-hold styling
Film formers are what hold a style: they dry into a connected film across the strands so the shape resists movement.

May suitVery dry or highly damaged hair
Hydrolysed fragments are small enough to sit in the gaps of a worn cuticle for a wash or two, temporarily restoring stiffness and cutting breakage in combing.
- film former
- protein
- hydrolysed protein
6 Ribes Grossularia Fruit Extract

General function
Gooseberry fruit extract, a botanical added for its vitamin-C reputation. It is a minor addition rather than a measured effect on hair.

Supporting ingredient
Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.
- botanical extract
7 Phyllostachis Bambusoides Extract

General function
An extract of Phyllostachis Bambusoides. Plant extracts are used across a wide range of levels, and label order is the best guide to how much is here.

Supporting ingredient
Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.
- botanical extract
8 Argania Spinosa Kernel Oil

General function
Argan oil. A medium-weight oil used for shine and softness on the outside of the strand.

Supporting ingredient
Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.

May suitDry, coarse, or high-porosity hair
Coats the surface and slows water leaving the strand, which is usually what coarse hair that dries out fast is missing.

May suitFrizz-prone, damaged, or high-friction hair
A thin oil layer lowers friction between strands and flattens the raised cuticle that scatters light and catches on its neighbours.

May not suitFine or easily flattened hair
Near the top of a list an oil is weight before it is anything else, and fine hair shows that first at the roots.
- oil
- emollient
▾Below about this point, order stops being meaningful — these are typically used at 1% or less.
9 Tocopheryl Acetate · Tocopheryl (Vitamin E) Acetate
- antioxidant
- vitamin
10 Aspalathus Linearis Leaf Extract
- botanical extract
11 Panthenyl Hydroxypropyl Steardimonium Chloride

General function
A positively charged conditioning agent. Damaged hair carries a negative charge, so it deposits where the damage is and makes wet hair comb through.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitFrizz-prone, damaged, or high-friction hair
A cationic conditioning agent: it binds to the damaged, negatively charged parts of the cuticle and lowers combing friction there.

May suitVery dry or highly damaged hair
The class that does the detangling in a conditioner. It deposits lubrication where the cuticle is worn.

DependsBuild-up-sensitive routines
Substantive by design. A routine with no detergent wash gives it nothing to leave with.

PubChem
- conditioning agent
12 Sodium Polyacrylate
13 Amodimethicone

General function
A silicone modified to stick where hair is damaged, so it smooths selectively instead of coating everything. It resists rinsing more than plain dimethicone.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitClimate-sensitive or frizz-prone hair
A surface film slows how quickly humidity reaches the cortex, which is what limits swelling-driven frizz in damp air.

May suitFrizz-prone, damaged, or high-friction hair
Amino-functional silicone carries a positive charge, so it binds where the cuticle is worn rather than coating evenly. Damaged areas get most of it.

May suitMaximum-hold styling
Film formers are what hold a style: they dry into a connected film across the strands so the shape resists movement.

International Journal of Trichology
- silicone
- conditioning agent
- film former
14 Dimethiconol

General function
A high-shine silicone often paired with dimethicone for a smoother, glossier finish.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitClimate-sensitive or frizz-prone hair
A surface film slows how quickly humidity reaches the cortex, which is what limits swelling-driven frizz in damp air.

May suitFrizz-prone, damaged, or high-friction hair
Lays a smooth film along the cuticle, which lowers combing friction and flattens the surface irregularities that read as frizz.

PubChem
- silicone
- emollient
15 Phenoxyethanol
- preservative
16 Caprylyl Glycol

General function
A gentle preservative helper that also holds a little moisture.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitVery dry or highly damaged hair
Humectants bind water into the strand, and water — not oil — is what makes dry hair flexible instead of brittle.

DependsClimate-sensitive or frizz-prone hair
A humectant follows the air: it holds water in humid conditions and can give it up in very dry ones. Climate decides what it does more than the label does.

PubChem
- preservative
- humectant
17 Trideceth-6
- emulsifier
- solubilizer
18 Cyclopentasiloxane

General function
A light, fast-evaporating silicone that spreads other ingredients then leaves. It gives serums their weightless glide.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitBuild-up-sensitive routines
It leaves the hair by evaporating rather than by being washed off, so it is not part of what accumulates.

May suitClimate-sensitive or frizz-prone hair
A surface film slows how quickly humidity reaches the cortex, which is what limits swelling-driven frizz in damp air.

May suitFine or easily flattened hair
A cyclic silicone evaporates after it has spread the formula, so it carries the other ingredients without leaving weight behind.

PubChem
- silicone
- emollient
19 Disodium EDTA

General function
Grabs metal ions from hard water so they cannot dull the hair or destabilise the formula.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitBuild-up-sensitive routines
Binds the calcium and magnesium in hard water, which is what stops mineral deposits accumulating on the strand wash after wash.

May suitGray, silver, or brass-prone hair
Copper and iron carried in tap water deposit on the strand and read as a dull, warm cast on gray or light hair. A chelator holds those metals in solution so the wash carries them off.

PubChem
- hard-water chelator
20 Potassium Sorbate
- preservative
21 Cetrimonium Chloride

General function
A quick-acting conditioning agent that reduces static and combing force. It also helps keep the formula stable.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitFine or easily flattened hair
The C16 quat binds mostly by charge rather than by chain, so it deposits measurably less than the C22 ones. Less deposit is less conditioning and also less weight, which is usually the trade fine hair wants.

May suitFrizz-prone, damaged, or high-friction hair
A cationic conditioning agent: it binds to the damaged, negatively charged parts of the cuticle and lowers combing friction there.

DependsBuild-up-sensitive routines
Substantive by design. A routine with no detergent wash gives it nothing to leave with.

International Journal of Cosmetic Science
- conditioning agent
- cleanser
22 Trideceth-10
- emulsifier
- solubilizer
23 Glycolic Acid

General function
The smallest fruit acid, used in scalp products to loosen flakes and clear build-up.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

DependsFrizz-prone, damaged, or high-friction hair
pH adjusters are how a formula is brought to a chosen acidity, and an acidic formula keeps the cuticle lying flatter than an alkaline one. Which way this one moves the pH depends on the formula, and the finished pH is not on the label.

PubChem
- exfoliant
- pH adjuster
24 Maltodextrin

General function
A starch fragment that soaks up oil and water, which is what puts it in dry shampoos. It also carries spray-dried plant extracts and leaves a light film.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitFine or easily flattened hair
Takes up oil at the root, which is where fine hair goes flat first.

May suitMaximum-hold styling
Film formers are what hold a style: they dry into a connected film across the strands so the shape resists movement.

DependsCurls or waves needing flexible hold
How rigid the finish is depends on which polymer it is and what the formula pairs with it, not on there being one.
- absorbent
- film former
- binder
25 Rapeseedamidopropyl Ethyldimonium Ethosulfate
- conditioning agent
26 Hexylene Glycol

General function
A solvent that keeps other ingredients dissolved and helps preservatives work.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitFine or easily flattened hair
Light and water-binding rather than oily, so it hydrates without contributing weight.

May suitVery dry or highly damaged hair
A small water-binding solvent. It holds moisture and helps the rest of the formula spread evenly over the strand.

DependsClimate-sensitive or frizz-prone hair
A humectant follows the air: it holds water in humid conditions and can give it up in very dry ones. Climate decides what it does more than the label does.

PubChem
- solvent
- humectant
27 Quaternium-96
28 Dipropylene Glycol

General function
A light humectant and solvent that helps fragrance and extracts dissolve evenly.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitFine or easily flattened hair
Light and water-binding rather than oily, so it hydrates without contributing weight.

May suitVery dry or highly damaged hair
A small water-binding solvent. It holds moisture and helps the rest of the formula spread evenly over the strand.

DependsClimate-sensitive or frizz-prone hair
A humectant follows the air: it holds water in humid conditions and can give it up in very dry ones. Climate decides what it does more than the label does.

PubChem
- humectant
- solvent
29 Propanediol

General function
A corn-derived humectant and solvent, often chosen as a lighter-feeling alternative to propylene glycol.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitFine or easily flattened hair
Light and water-binding rather than oily, so it hydrates without contributing weight.

May suitVery dry or highly damaged hair
A small water-binding solvent. It holds moisture and helps the rest of the formula spread evenly over the strand.

DependsClimate-sensitive or frizz-prone hair
A humectant follows the air: it holds water in humid conditions and can give it up in very dry ones. Climate decides what it does more than the label does.

PubChem
- humectant
- solvent
30 Fragrance · Fragrance (Parfum)

General function
An undisclosed blend of scent ingredients. Regulations let it stay unlisted, so a fragrance-free product is the only way to be certain what is not in it.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May not suitFragrance-sensitive routines
Declared fragrance. On a fragrance-sensitive routine this is the line that decides it, wherever it sits on the label.
- fragrance
- declared fragrance
31 Alpha-Isomethyl Ionone

General function
A violet-like fragrance component named separately as a recognised allergen.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May not suitFragrance-sensitive routines
One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.

PubChem
- fragrance
- named fragrance allergen
32 Benzyl Benzoate

General function
A fragrance component with a faint balsamic scent, named separately on the label because it is a recognised contact allergen.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May not suitFragrance-sensitive routines
One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.

PubChem
- fragrance
- named fragrance allergen
33 Citronellol

General function
A rose-like fragrance component named separately as a recognised allergen.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May not suitFragrance-sensitive routines
One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.

PubChem
- fragrance
- named fragrance allergen
34 Hexyl Cinnamal

General function
A jasmine-like fragrance component named separately as a recognised allergen.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May not suitFragrance-sensitive routines
One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.

PubChem
- fragrance
- named fragrance allergen
35 Limonene

General function
A citrus-smelling fragrance component that EU rules require to be named separately because some people react to it.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May not suitFragrance-sensitive routines
One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.

PubChem
- fragrance
- named fragrance allergen
36 Linalool

General function
A floral fragrance component listed separately as a recognised contact allergen.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May not suitFragrance-sensitive routines
One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.

PubChem
- fragrance
- named fragrance allergen

What the whole list adds up to

7 fragrances
6 named fragrance allergens
5 solvents
5 emollients
5 humectants
4 silicones
3 film formers
3 botanical extracts
3 conditioning agents
3 preservatives
2 conditioning agents
2 emulsifiers
2 solubilizers
1 protein

Ingredient list captured 2026-09-03. Formulas change — check the package in your hand when an ingredient matters to you.

Price · 5.64 oz

Seen at $11.99 1 store · checked Sep 3

Good value under $8 Under $1.43/oz it costs less than three-quarters of the 7 products we score as doing the same job

Priced above the products that do the same job. Stores sell it above the $8 line; products that do this job typically go for about $11 at this size.

Show the price ladder

Price for 5.64 ozlower is better

Where we’ve seen it2 listings · 1 store

CHI (chi.com)
$11.99

5.64 oz · $2.13/oz

Sep 3Lowest per oz
CHI (chi.com)
$11.99

5.64 oz · $2.13/oz

Sep 3

Sorted by price per ounce. Dated observations from our research, not live prices. Direct store pages, no affiliate links. We don’t sell this product.

How we work this out

5.64 oz is the size stores list most often; every comparison on this page is made at it. Other sizes are shown in the Sizes row and the store list.
Seen at $11.99 is the price we have observed for the 5.64 oz. We need three stores before we call a price commonly seen.
Good value under $8 comes from the 7 products we score as doing the same job as this one. A quarter of them cost less than $1.43/oz; at 5.64 oz that is $8. Under that line you are paying less than most of them.
About $11 is what those same products typically cost at this size — the midpoint of their prices per ounce, scaled to 5.64 oz.

Formula

Formula score

7 of 10

Both the formula and the price land mid-range: it covers the core of what a leave-in does and costs about what leave-ins cost per ounce.

How the score is counted

2 products we score as doing the same job cost less per ounce
Costs more per ounce than 50% of the 477 leave-ins we’ve priced
No conditioning agents up front in the formula
Reviewers mention 2 things they like about how it performs

Conditioning agents up frontWhat makes wet hair comb through.2 pts
A humectantBinds water into the hair.2 pts
A light baseWater or a volatile carrier first, so it does not weigh hair down.2 pts
Oils or butters in the working zoneSoftens the strand rather than just coating it.2 pts
No detergent-dependent filmNothing that needs a clarifying wash to remove.1 pt
Fragrance kept out of the top eightScent as a finishing touch, not a major share.1 pt

The formula score is completeness for the job: the share of the systems this product type is normally built around that we can find in this list, weighted. It is not efficacy, not quality, and it never compares across product types.

Does the same job, for less

Same derived functions — what it cleans, conditions, coats or holds — at a lower cost per ounce. Scent, texture and where you buy it can still differ.

HaskClosest function Keratin Protein 5-in-1 Leave in Spray $1.17/oz $0.96/oz less

Heat protect
Protein
Alcohol-free

Function: Slip and detangling
Also: Fruity scent
6 oz bottle
Sold in drugstores and mass retail

Compare

AphogeeLowest cost per oz Curlific! Moisture Rich Leave-in $1.03/oz $1.10/oz less

Protein
Alcohol-free
Medium weight

· Close function

Function: Oils and butters
Also: 8 oz bottle

Compare

See more alternatives in the product library

These are functional neighbours, not personal recommendations — they are close on formula, not chosen for anyone. Get the one that fits your hair, routine, and budget

Final decision

Should you buy it?

A solid pick for the hair it suits

Best user

Soft, over-stretchy hair, looking for protein high in the formula and moisture that stays in

Biggest tradeoff

Worth skipping for anyone sensitive to fragrance, curly-method routines, or hair that stiffens on protein

Best alternative if not

Hask Keratin Protein 5-in-1 Leave in Spray, for similar results at a lower price

We do not sell products or take placement fees. This page states what the formula and the prices show; the consultation is what matches it to a person.

Claims check

What the brand says, against what the formula shows

Claims are quoted from the brand. We only mark one supported, partly supported, or conflicting when the ingredient list actually speaks to it; everything else stays "stated by the brand", which is not a criticism — most claims simply cannot be read off a label.

SupportedBacked by ingredients

Partly supportedSome supporting logic

Stated by brandNo clear evidence

Potential conflictFormula works against claim

Locks in moisture

Humectants or rich emollients sit in the first eight ingredients.

Dimethicone
C15-19 Alkane
Glycerin

Supported

Helps hair feel hydrated.

Strengthens by helping seal the cuticle

Protein sits in the first eight ingredients.

Hydrolyzed Silk
Panthenyl Hydroxypropyl Steardimonium Chloride

Supported

Reinforces a damaged strand.

Helps keeps hair color vibrant and rich

This is a marketing claim; an ingredient list cannot speak to it.

—

Stated by brand

Can’t be confirmed from label.

Protects against color fade with antioxidants

It avoids sulfate detergents, which are the usual cause of fast fade.

Tocopheryl Acetate
Panthenyl Hydroxypropyl Steardimonium Chloride

Supported

Less fade per wash.

This therapeutic leave-in treatment for color-treated hair strengthens and protects with maracuja oil, silk, and red tea extract to prevent color loss and maintain vibrancy.

It avoids sulfate detergents, which are the usual cause of fast fade.

Tocopheryl Acetate
Panthenyl Hydroxypropyl Steardimonium Chloride

Supported

Less fade per wash.

Apply to hair ends and leave in on non-shampoo days for daily nourishment and protection.

These are the brand’s directions for use, not a claim about the formula.

—

Stated by brand

How to use it, not a claim.

How to read this

We look at the first 10–15 ingredients and what they do in a formula — not marketing. If the list doesn't speak to a claim, we don't assume.

Reviewers

What people report

Recurring themes our researchers wrote in their own words from sourced reviews. We do not store or scrape star ratings.

Long wavy and dry or damaged hair is where the praise is strongest: it smooths frizz before a blow-dry and is called a miracle for dry hair, with one reviewer glad it is free of citric acid.

long wavy hair, dry or damaged hair, one citric-acid-sensitive reviewer

Reviewers with colour-treated hair say a small amount on damp ends leaves hair soft, shiny and detangled without stripping colour, and several rebuy it after finding it again.

colour-treated hair, repeat buyers

The main complaint is texture: some found it tacky or hard to spread, needing a lot of product and then leaving hair heavy, and one expected an oil rather than a cream.

the three-star reviewers

A few say their colour still faded and it only helped with detangling, or that it left hair dry; two critical reviews concern a broken seal on delivery rather than the product.

the 16% one-to-three-star reviewers

How this page was made

Everything above is generated from our researched product record — identity, the ingredient list as printed, the brand's own claims, dated price observations, and review themes written in our researchers' own words. No part of this page is written per product.
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.
Both scores out of ten are defined on this page. The formula score is completeness for the job, computed from a fixed per-format checklist shown beneath the gauge; the price score is cost per ounce against every product of this type we have priced.
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.
3 sources consulted for this product (0 manufacturer or regulatory, 2 retailer, 1 editorial), last checked 2026-09-03.
Ingredient references are linked for 18 of 24 product-aware annotations on this page. Fit notes are conditional formulation guidance, not a conclusion about the finished product or about you.
We have not tested this product in a lab and we do not physically test your hair. Formula readings come from the ingredient list; behaviour claims are labelled as the brand's.
Ingredient order tells you relative amount only above roughly 1%. Prices are observations on the dates shown and change without notice.
Ingredient names link to our ingredient library, where each entry shows what it does, which product types use it, and where it usually sits on a label across everything we have researched.
This is cosmetic information, not medical advice, and nothing here diagnoses or treats a health condition.
Formula readings: derivation v22. Record last updated 2026-09-03.

BioSilk Color Therapy Lock and Protect

Is this right for you?

Read from the label, not the marketing

The ingredients that change a decision

What the whole list adds up to

Should you buy it?

What the brand says, against what the formula shows

What people report

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How this page was made

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