Pro Clinical Hair Fall Defense Serum

In the US, ingredients above 1% are listed from most to least. Below 1% they can appear in any order. Each note keeps three things apart: what the ingredient generally does, its role in this type of product, and what its position can tell you.

• 1 Alcohol Denat. · Alcohol Denat
  General function

  Fast-drying alcohol used to make sprays set quickly. In leave-on products it can leave hair feeling dry, especially in high position on the list.

  Leading ingredient

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

  May suitFine or easily flattened hair

  Evaporates on contact, which is how a spray sets almost instantly and leaves no weight behind it.

  May not suitDry, coarse, or high-porosity hair

  Porous hair gives water up easily as it is; a fast-evaporating solvent high on the list accelerates that.

  May not suitVery dry or highly damaged hair

  It evaporates quickly and takes some water with it. On hair already short of moisture, a formula built on a lot of it can finish drier than it started.

  PubChem
  • drying alcohol
  • solvent
• 2 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
• 3 Niacinamide
  General function

  Vitamin B3, used in scalp products for conditioning claims.

  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

  Deposits a lubricating layer that makes combing easier, which is most of what stops mechanical damage adding to frizz.

  PubChem
  • vitamin
  • conditioning agent
• 4 Caffeine
  General function

  Included in scalp and thickening products for label appeal. Evidence for applied caffeine changing hair growth is limited.

  Supporting ingredient

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

  PubChem
  • active
• ▾Below about here, the order stops meaning much. These are usually used at 1% or less.
• 5 Sandalore
  General function

  A manufactured fragrance ingredient that adds a warm sandalwood scent to a 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.

  • fragrance
• 6 Fragrance · Parfum/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
• 7 Lauric Acid
  General function

  A coconut-derived fatty acid used to build cleansers and stabilise foam.

  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.

  PubChem
  • emulsifier
• 8 PEG-40 Hydrogenated Castor Oil
  General function

  A castor-oil derivative that dissolves fragrance and oils into water so the product stays clear and does not separate.

  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.

  • solubilizer
  • emulsifier
• 9 PEG-35 Castor Oil
• 10 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
• 11 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
• 12 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
• 13 Alcohol Denat. · Alcohol
  General function

  Fast-drying alcohol used to make sprays set quickly. In leave-on products it can leave hair feeling dry, especially in high position on 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 suitFine or easily flattened hair

  Evaporates on contact, which is how a spray sets almost instantly and leaves no weight behind it.

  PubChem
  • drying alcohol
  • solvent
• 14 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
• 15 Tocopherol
  • antioxidant
  • vitamin
• 16 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

What the whole list adds up to

• 6 fragrances
• 4 named fragrance allergens
• 3 solvents
• 2 drying alcohols
• 2 vitamins
• 2 emulsifiers
• 1 conditioning agent
• 1 active
• 1 declared fragrance
• 1 solubilizer
• 1 antioxidant
• 1 pH adjuster
• 1 hard-water chelator

Ingredient list captured 2026-09-11. Formulas change, so check the package in your hand when an ingredient matters to you.