Shampoo · Kerastase

Kérastase Blond Absolu, Anti-Brass Purple Shampoo, For Cool Blondes and Grey Hair, With Hyaluronic Acid 250ml

£30.50 at Boots
4.7 / 5
★★★★★★★★★★
979 reviews across 1 retailer
93% rate it 4 or 5 stars
5★
812
4★
102
3★
25
2★
10
1★
30
Boots4.69★★★★★★★★★★979 reviews (971 with text)

Summary. Reviewers are very positive: 93% give it 4 or 5 stars.

+Positives

  • Tone and colour. Keeps blonde, grey or dyed hair looking bright and even. 178 reviews
  • Scent. Reviewers often single out how it smells. 56 reviews
  • Softness. Hair is described as softer and smoother afterwards. 45 reviews
  • Shine. Many notice extra shine. 36 reviews
  • Lather. Foams up readily, so each wash needs only a little product. 17 reviews

−Negatives

  • Can be drying. Some find it leaves hair dry, rough or stripped. 10 reviews
  • Colour problems. Some saw an unwanted tint or no toning effect. 10 reviews
  • Scalp irritation. A minority report itching, burning or redness. 6 reviews
  • Residue. Some say it leaves hair greasy, heavy or coated. 5 reviews
Last 12 months: 4.8 from 233 reviews, in line with the all-time score.
Product-specific reviews only: 11 reviews that also appear on other products were left out, so every review here is about this product.

Reviews from 15 Jan 2019 to 18 Aug 2026. 8 are star ratings without text.