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An under £5 keratin smoothing shampoo that effectively tackles frizz from the very first wash is rivalling expensive brands, with users raving about how it leaves hair 'sleek and shiny'.

Garnier’s new expert four-step routine for sleek hair has hit shelves this month, promising up to three days of frizz-free shine without a salon visit. Priced from just £4, it harnesses Keratin Smoothing Complexes and nourishing Argan Oil at a brilliant value. One user praised the results, saying: 'shiny, no frizz, does what it says on the tube'.

Garnier Keratin Sleek Shampoo, 200ml  £4

The first step in the four-step routine, the shampoo helps cleanse your hair whilst the added four per cent Keratin Smoothing Complex and nourishing Argan Oil formula provides your hair with lasting smoothness and brilliant shine, too.

Effectively tackling frizz from the very first wash, whilst leaving your hair feeling soft and manageable, this is a wash that would make you look forward to hair wash day. 

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Diamond Sleek Smoothing Spray, 150ml £5

If you're looking to dial up the shine on dull hair then this multi-purpose spray is what you need.

Not only does it shield and smooth hair to reduce frizz even in high humidity but it works by coating the hair fibre to boost light reflection from all angles, delivering a diamond-like shine.

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The new Garnier Keratin Sleek range is a four-step system designed to transform frizzy, dull hair into sleek, glossy lengths

Keratin is your hair’s natural building block, a protective protein that keeps strands smooth, strong, and shiny. Heat styling, colouring, and sun exposure can break it down, leaving hair dry, frizzy, or weak. 

Salon treatments have surged in popularity in recent years, with keratin-based products offering a convenient way to repair and smooth damaged hair without the time, expense, or commitment of frequent salon visits. 

For frizz-prone, dry hair, keratin is a game-changer, helping refill those 'gaps' in the hair, helping smooth the outer layer of your hair so it looks sleeker, feels softer, and is less prone to breakage.

And if you're looking for a good place to start, the new Garnier Keratin Sleek range is here to help with a shampoo, conditioner, mask and smoothing spray so you can dial up the shine this spring from your own shower. 

The new Garnier Keratin Sleek Shampoo and Diamond Sleek Smoothing Spray have already been receiving high praise from users who have noticed an immediate transformation in their hair’s texture, shine, and manageability. 

One user wrote: 'I am loving this shampoo. I can't believe the difference in my hair since I have been using this. My hair feels so much smoother and looks glossy. This smells lovely and lathers up well. I will definitely keep using this.'

Others echoed similar results, particularly praising how effectively the formula tackles frizz and leaves hair feeling clean yet soft. Another reviewer noted, 'Lovely fresh smelling shampoo that lathered up brilliantly and left my hair and scalp squeaky clean. 

The new range is powered by advanced Keratin Smoothing Complexes and enriched with nourishing Argan Oil 

'My hair upon drying was smooth with no frizz or flyaway. Super impressed! I’d definitely purchase this product again.'

The results appear to extend beyond individual use, with some even receiving compliments from those around them, as one review put it, 'Beautiful shampoo. Leaves my hair feeling so soft and smooth, even my husband made comment on how sleek and smooth my hair was, he has even started to use this himself.'

Powered by advanced Keratin Smoothing Complexes and enriched with nourishing Argan Oil, each product works together to deliver long-lasting smoothness, enhanced shine, and improved manageability from the first use. When used as a full routine, Garnier claims up to three days of frizz-free shine. 

The first step in the four-step routine is the £4 Garnier Keratin Sleek Shampoo. Not only do you get the benefits of a clean hair feel, but the added 4 per cent Keratin Smoothing Complex and nourishing Argan Oil formula also provide your hair with lasting smoothness and brilliant shine, too.

Effectively tackling frizz from the very first wash, whilst leaving your hair feeling soft and manageable, this is a wash that would make you look forward to hair wash day. 

The brand's new smoothing spray is a heat-activated spray coats the hair fibre to enhance light reflection, delivering a luminous, diamond-like shine

The Keratin Sleek Conditioner complements the shampoo, powered by an impressive 10 per cent Keratin Smoothing Complex and nourishing Argan Oil to leave it feeling incredibly smooth and manageable with up to 93 per cent shinier locks. 

The Keratin Sleek Mask can be used in place of the conditioner two to three times a week, offering a more intensive treatment powered by a 13 per cent Keratin Smoothing Complex to intensely smooth the hair fibre from root to tip. 

And lastly, the Diamond Sleek Shine-Coat Smoothing Spray. A multi-purpose product, it works by coating the hair fibre to boost light reflection from all angles, delivering a diamond-like shine that claims to last for up to 100 hours and also provides essential protection from heat styling tools, including blow drying and straightening.