Straight Hair Shampoo

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
  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 Sodium Lauroyl Methyl Isethionate
  General function

  A gentle, dense-lathering cleanser used as the primary detergent in many sulfate-free shampoos.

  Leading ingredient

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

  May suitCurls or waves needing flexible hold

  The detergent class most curl routines are built around: it lathers and cleanses without stripping the strand back to bare.

  May suitDry, coarse, or high-porosity hair

  A gentler detergent leaves more of the surface oil that slows water loss from coarse or porous hair.

  May suitVery dry or highly damaged hair

  Cleanses with less sebum removal than a sulfate detergent, so hair that is short of moisture keeps more of it through the wash.

  • mild anionic cleanser
  • cleanser
• 3 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.

  Leading ingredient

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

  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
• 4 Sodium Methyl Cocoyl Taurate
  General function

  A mild cleanser that keeps foaming in hard water and rinses cleanly.

  Supporting ingredient

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

  May suitCurls or waves needing flexible hold

  The detergent class most curl routines are built around: it lathers and cleanses without stripping the strand back to bare.

  May suitDry, coarse, or high-porosity hair

  A gentler detergent leaves more of the surface oil that slows water loss from coarse or porous hair.

  May suitVery dry or highly damaged hair

  Cleanses with less sebum removal than a sulfate detergent, so hair that is short of moisture keeps more of it through the wash.

  • mild anionic cleanser
  • cleanser
• 5 PEG-120 Methyl Glucose Dioleate
  General function

  A sugar-derived thickener used to build body in sulfate-free cleansers.

  Supporting ingredient

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

  • thickener
  • emulsifier
• 6 Cocoamidopropyl Hydroxysultaine
  General function

  A mild secondary cleanser. It boosts foam and softens the effect of the stronger detergent it is paired with.

  Supporting ingredient

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

  • amphoteric cleanser
  • secondary cleanser
  • cleanser
• 7 Sodium Methyl Isethionate
  General function

  A mild cleanser that accompanies sodium lauroyl methyl isethionate in gentle shampoo bases.

  Supporting ingredient

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

  May suitBuild-up-sensitive routines

  Cleansing is what lifts deposited films off the strand. How completely depends on which detergent it is and how high on the list it sits.

  DependsVery dry or highly damaged hair

  Every detergent removes some sebum along with the product it is there to wash out. Which detergent it is matters more than that there is one.

  PubChem
  • cleanser
• 8 Cocos Nucifera (Coconut) Fruit Juice
  General function

  Coconut juice used in place of some of the plain water in a formula.

  Supporting ingredient

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

  • botanical extract
• 9 Lauric Acid
  • emulsifier
• 10 Acrylates Crosspolymer-4
  General function

  A cross-linked acrylate that thickens a gel and dries to a holding film. Cross-linking makes it build viscosity as well as set.

  Secondary ingredient

  Lower in the ordered portion of the list, it is more likely playing a supporting role than defining the formula.

  May suitClimate-sensitive or frizz-prone hair

  A set polymer film is a physical barrier to humidity, so a style keeps its shape longer in damp conditions.

  May suitMaximum-hold styling

  Synthetic film formers dry into a continuous film, which is what holds a shape against movement and against humid air.

  DependsBuild-up-sensitive routines

  Some acrylate copolymers rinse with water and some need a detergent; the label alone does not say which one a formula used.

  • film former
  • polymer
  • thickener
• ▾Below about this point, order stops being meaningful — these are typically used at 1% or less.
• 11 Trisodium Ethylenediamine Disuccinate
  General function

  A readily biodegradable chelator used in place of EDTA to bind hard-water minerals.

  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
• 12 Glycol Distearate
  General function

  A wax that gives shampoo its pearly look and a slightly richer feel.

  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

  Emollients fill and smooth the surface of the strand, which lowers the friction that lifts the cuticle and reads as roughness.

  PubChem
  • opacifier
  • emollient
• 13 Phenoxyethanol
  • preservative
• 14 Sodium Chloride
  • salt
  • thickener
• 15 Propoxytetramethyl Piperidinyl Dimethicone
  General function

  A silicone. Silicones coat the strand for slip, shine and frizz control; unless the name carries PEG or PPG, removing one takes a detergent rather than water.

  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.

  • silicone
  • conditioning agent
• 16 Sodium Laurate
  General function

  A fatty ester. Esters give slip and a smooth after-feel; lighter ones read dry and silky, heavier ones read rich.

  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

  A light emollient: it softens the surface with noticeably less weight than an oil or a butter.

  May suitFrizz-prone, damaged, or high-friction hair

  Spreads thin and lowers friction between strands without the heaviness of a fixed oil.

  • light ester
  • emollient
• 17 Methyl Gluceth-10
  General function

  A sugar-derived humectant that also helps a formula stay blended.

  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 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

  A humectant moves water in whichever direction the air allows: it holds moisture in humid conditions and can pull it back out of hair in very dry ones.

  • humectant
  • emulsifier
• 18 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
• 19 Chlorphenesin
  • preservative
• 20 Potassium Sorbate
  • preservative
• 21 Polyquaternium-7
  General function

  A conditioning polymer that improves wet combing and adds body. Repeated use can build up on fine hair.

  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 suitCurls or waves needing flexible hold

  Cationic polymers hold a curl loosely and stay soft, which is why they turn up in definition products rather than firm-hold ones.

  May suitFrizz-prone, damaged, or high-friction hair

  A cationic polymer stays on the hair through rinsing, which is what keeps static and combing friction down after the wash.

  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.

  • conditioning agent
  • film former
  • polymer
• 22 Trideceth-6
  • emulsifier
  • solubilizer
• 23 C11-15 Pareth-7
  • emulsifier
  • solubilizer
• 24 Ethylhexylglycerin
  General function

  A preservative booster that also adds a little softness. Almost always paired with phenoxyethanol.

  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

  Emollients fill and smooth the surface of the strand, which lowers the friction that lifts the cuticle and reads as roughness.

  PubChem
  • preservative
  • emollient
• 25 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
• 26 Guar Hydroxypropyltrimonium Chloride
  General function

  A conditioning polymer made from guar bean gum. It deposits during rinsing, which is why sulfate shampoos can still leave hair soft.

  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 suitCurls or waves needing flexible hold

  Gums thicken and set soft, which gives definition that bends rather than a rigid cast.

  May suitFrizz-prone, damaged, or high-friction hair

  Cationic conditioners bind to the negatively charged damaged cuticle, laying it flat and cutting the friction that causes combing breakage.

  May suitMaximum-hold styling

  A styling polymer dries into a film across the strands, which is what makes a shape hold instead of relax.

  • conditioning agent
  • polymer
  • gum
• 27 Hydroxypropyl Methylcellulose
  General function

  A cellulose thickener used for slip and light hold in gels and creams.

  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 suitCurls or waves needing flexible hold

  A polysaccharide film stays softer than a synthetic one as it dries, which is what leaves a curl defined but still able to move.

  May suitFrizz-prone, damaged, or high-friction hair

  A soft film binds neighbouring strands together, which is most of what keeps flyaways lying down without stiffness.

  May not suitMaximum-hold styling

  Gum films stay soft. A style that needs firm fixation usually wants a synthetic polymer doing the holding.

  • gum
  • thickener
  • film former
• 28 Sodium Benzoate
  • preservative
• 29 Sodium Benzotriazolyl Butylphenol Sulfonate
• 30 Citric Acid
  General function

  Used to bring the product to a slightly acidic pH, which helps the cuticle lie flat. It is almost always near the end of the list.

  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

  Holds hard-water minerals in solution so they rinse away instead of depositing on the hair.

  May suitFrizz-prone, damaged, or high-friction hair

  The acid side of pH adjustment, and the reason it matters is measured: alkaline formulas raise the fibre's surface negative charge, increase friction between strands and lift the scales, while lower-pH ones do the reverse.

  May suitGray, silver, or brass-prone hair

  Where a warm cast comes from water minerals rather than from the hair itself, holding those metals in solution is what removes it.

  International Journal of Trichology
  • pH adjuster
  • hard-water chelator
• 31 Fragrance
  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
• 32 Citral
  General function

  A lemon-scented fragrance component listed 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
• 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 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
• 35 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
• 36 Blue 1 (CI 42090) · Blue 1
  General function

  A certified colour used to tint the product itself, not the hair.

  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 suitGray, silver, or brass-prone hair

  A violet or blue colorant sits opposite yellow on the colour wheel, so a trace of it deposited on the surface makes a warm cast read cooler. It washes out over the following few washes.

  • colourant
  • direct dye
  • blue dye
• 37 Red 33
  General function

  A certified colour used to tint the product. It does not colour hair.

  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 suitGray, silver, or brass-prone hair

  A violet or blue colorant sits opposite yellow on the colour wheel, so a trace of it deposited on the surface makes a warm cast read cooler. It washes out over the following few washes.

  • colourant

What the whole list adds up to

• 6 preservatives
• 5 emulsifiers
• 5 fragrances
• 4 cleansers
• 4 humectants
• 4 thickeners
• 4 named fragrance allergens
• 3 film formers
• 3 polymers
• 3 emollients
• 2 solvents
• 2 mild anionic cleansers
• 2 hard-water chelators
• 2 conditioning agents

Ingredient list captured 2026-08-22. Formulas change — check the package in your hand when an ingredient matters to you.