L'oreal Professionnel Keratin Alpha Sleek Hair Serum Anti Frizz, Smoothing & Glass Shine 50ml
50ml · Liquid
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Price history
Best price so far: £28.50 at Boots on 5 Sept 2026
It's at the cheapest we've seen in 90 days.
About this product
L'Oréal Professionnel Keratin Alpha Sleek Hair Serum, Anti Frizz, Heat Protection, Smoothing & Glass Shine 50mlReprograms hair for up to 2 weeks of frizz control1•tUp to 5x smoother hair and 2x less frizz2•tControls unwanted volume for daily styling in half the time3Keratin Alpha Sleek Mirror Sleek Serum, formulated with Keratin Sealer 5%. The Mirror Sleek serum seals the hair’s keratin structure to:•tDelivers instant shine that lasts up to 5 days.4•tThe serum helps to fight against up to 80% humidity5•tHeat protection up to 230°C (450°F)6Heat-activated. Dry with hair dryer. Use straightening iron for longer lasting results. This serum is artificial colorant free, and alcohol free.1Instrumental test after 4 uses of Smooth Transformer. ²Instrumental tests with routine 4 times of Shampoo + Smooth Transformer + Leave-on. ³ Consumer test on 68 participants, 1 application/week for 4 weeks. Based on a 15-day break observation. 4Instrumental test after 1 application of shampoo, mask & serum. 5Instrumental tests, with full routine after 4 uses of the Smooth Transformer. 6Instrumental tests. | L'oreal Professionnel Keratin Alpha Sleek Hair Serum Anti Frizz, Smoothing & Glass Shine, 50ml