Garnier introduced a four‑product Keratin Sleek system in early May, tagreting consumers who want smooth,glossy hair without salon prices.. The line—shampoo, conditioner, mask and a Diamond Sleek smoothing spray—claims to keep frizz at bay for up to three days, with individual items priced between £4 and £5.

£4 Shampoo and £5 Spray Aim to Undercut Salon Prices

The Keratin Sleek Shampoo, sold for £4 in a 200 ml bottle, contains a 4% Keratin Smoothing Complex and argan oil, according to the Daily Mail brief. Reviewers say it “effectively tackles frizz from the very first wash,” positioning it against higher‑priced salon alternatives.

Complementing the shampoo, the Diamond Sleek Smoothing Spray retails for £5 in a 150 ml bottle. The product advertises a “diamond‑like shine” by coating hair fibres to reflect light, a claim echoed by users who note its performance even in high humidity.

Four‑Step Routine Targets Frizz‑Prone Hair with Keratin and Argan Oil

Garnier’s marketing emphasizes that keratin is a natural hair protein that can be depleted by heat, colour, and sun exposure.. by replenishing keratin and adding argan oil, the four‑step system—shampoo, conditioner, mask , and spray—promises smoother, stronger strands that are less likely to break.

The conditioner and mask, though not priced individually in the source, are described as “nourishing” and designed to lock in the smoothing benefits of the shampoo, extending the three‑day frizz‑free window.

Consumer Praise Highlights Value Over Luxury Brands

One user quoted in the Daily Mail article praised the line, stating, “shiny, no frizz, does what it says on the tube.” Such feedback suggests the products are resonating with budget‑consciious shoppers who previously relied on expensive salon treatments.

Industry observers note a broader surge in at‑home keratin solutions, as consumers seek salon‑like results without the time or cost commitment. Garnier’s entry at a sub‑£5 price point could intensify competition among mass‑market beauty brands.

Who Is Behind the Keratin Claims? – Missing Independent Testing

The Daily Mail report does not reference any third‑party laboratory verification of the three‑day frizz‑free claim . It also omits details about the exact concentration of argan oil or the methodology used to assess shine, leaving room for skepticism about the efficacy versus higher‑priced professional treatments.

Additionally, the article does not disclose whether any dermatologists or hair‑care experts have evaluated the products, a gap that consumers may want to consider before replacing salon visits entirely.

What Still Needs Confirmation – Longevity and Hair Type Suitability

Key unanswered points include whether the three‑day frizz control holds for very curly or chemically treated hair, and how the products perform in extreme humidity beyond the anecdotal user comments. The source also lacks comparative data on how the Garnier line stacks up against other at‑home keratin kits on the market.

Potential buyers should watch for independent reviews that test the claims across diverse hair textures and environmental conditions.