The Inkey List Polyglutamic Acid Anti-Frizz Hair Treatment
Evidence-led ingredient analysis, a transparent clean score out of 100 and cleaner, effective alternatives at three price levels.
Best for
Frizz & Humidity
Why Selenssa recommends it
This affordable treatment uses high-molecular-weight polyglutamic acid to create a hydrating shield on the hair shaft, smoothing frizz without heavy silicone buildup. It effectively reduces flyaways and enhances shine on damp weather days.
Key actives
Polyglutamic Acid 2%, Inula Crithmoide Extract 2%, Cetiol HE 2%
Clean highlights
Fragrance-free · Sulphate-free · Cruelty-free · Silicone-free
Selenssa Score 93/100 · £9.99
Want to see how this compares? See The Selenssa 3 →The Inkey List
Polyglutamic Acid Anti-Frizz Hair Treatment
Frizz & Humidity · Budget: £9.99
4.3 (850 reviews)· across Boots UK, Cult Beauty, LookFantastic, The Inkey List UK
Ingredients: AI-inferred — not yet verified
Inferred formulation. Highly rated, fragrance-free leave-on hair treatment with strong hydrating and anti-frizz benefits.
Hazard categories
Estimated score out of 100
Formulation score is fixed across Selenssa · Community effectiveness awaiting more reports
Based on publicly available ingredients, following our methodology. Not medical advice — always check the physical label, especially for allergies. How we score →
Buy Now Sign in to save to My ShelfShareable page: selenssa.com/product/the-inkey-list-polyglutamic-acid-anti-frizz-hair-treatment
Highly recommended as a clean, effective, budget-friendly hydrating serum for frizz control.
Be cautious if
Users with known contact allergies to Benzyl Alcohol.
Against your clean standard
Yes, meets clean beauty standards easily with zero high-concern ingredients.
Where this score comes from
- Source
- No source record on file yet
- Source page
- —
- Retrieved
- —
- Evidence snapshot
- Not captured
Score history
No score changes have been recorded for this product yet.
Think something here is wrong? Report a correction · How we score
Does The Inkey List Polyglutamic Acid Anti-Frizz Hair Treatment contain parabens, sulfates or fragrance?
A straight yes or no for the ingredient groups people most often want to avoid, checked against this product's published formulation.
Free from parabens
Preservatives; the longer-chain ones (propyl, butyl) carry the endocrine questions.
Free from sulfates (sls / sles)
Strong cleansing agents that can strip a compromised barrier.
Free from silicones
Slip and occlusion; cyclic silicones (D4/D5/D6) are the environmentally restricted ones.
Free from fragrance / parfum
Undisclosed fragrance blends are the most common trigger for sensitised skin.
Free from essential oils
Naturally derived, but among the most frequently reported contact allergens.
Contains drying alcohol
Found: phenoxyethanol. Fine in small amounts for texture; high up the list it can dehydrate.
Free from formaldehyde releasers
Preservatives that slowly release formaldehyde.
Free from chemical uv filters of concern
Restricted or debated filters with endocrine or reef-persistence questions.
Is The Inkey List Polyglutamic Acid Anti-Frizz Hair Treatment non-comedogenic?
No ingredients in this formulation appear on Selenssa's common pore-clogger list, so it is unlikely to be the cause of congestion for most people. Comedogenicity is still individual — texture, occlusion and how much you use all play a part.
Is The Inkey List Polyglutamic Acid Anti-Frizz Hair Treatment safe for sensitive skin?
Generally a reasonable choice for sensitive skin.
- No fragrance or parfum in the list
- Contains a drying alcohol
Ingredients worth knowing about: Benzyl Alcohol.
The Inkey List Polyglutamic Acid Anti-Frizz Hair Treatment full ingredients list
14 ingredients analysed, in the order Selenssa assessed them. Concentration generally falls as you move down the list.
Water (Aqua/Eau), Polyquaternium-37, Polyglutamic Acid, Hydrolyzed Wheat Protein, Phospholipids, Glycine Soja (Soybean) Oil, Glycolipids, Glycine Soja (Soybean) Sterols, Trisodium Ethylenediamine Disuccinate, Phenoxyethanol, Ethylhexylglycerin, Benzyl Alcohol, Potassium Sorbate, Sodium Benzoate.
The actives doing the work: Polyglutamic Acid (Forms a moisture-retaining shield over the hair shaft to prevent humidity frizz.); Hydrolyzed Wheat Protein (Penetrates the hair cuticle to improve tensile strength and elasticity.); Phospholipids & Glycolipids (Replenish natural barrier lipids lost to heat styling and environmental exposure.).
Keep exploring
Get The Selenssa 3
Three products worth knowing about, one beauty concern decoded, plus the best offers we’ve found.
No spam. Just genuinely useful beauty.
You can unsubscribe at any time. See our Privacy Policy.