Live Amazon price · product details checked 5 September 2026
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We keep Olia Garnier Olia 5.0 Brown, oil-powered, no-ammonia. 100% on our hair care shelf alongside 49 others, and rank it on rating, review volume and live price rather than on the brand. The manufacturer puts it this way: Powered, ammonia-free formula with Natural Flower Seed oils, designed for maximum colour performance. Luminous, long-lasting light chocolate brown shade with multi-dimensional undertones and provides up to 100% grey coverage. That is the maker talking, not us, so read it as a claim rather than a finding. Buyers have it at 4.5 out of 5 from 1,851 ratings. We work out below what that is worth against everything else on the shelf.
Across the 50 rated hair care products we track, the middle of the pack sits at 4.5 out of 5. This one scores 4.5. That's mid-table. Star ratings won't separate this from its neighbours, so the decision comes down to pack size, price per unit and whether the specifics below suit you.
Behind that score sit 1,851 ratings, against a shelf median of 4,347. That isn't much to go on by the standards of this shelf. Scores this lightly reviewed move easily, so take it as a first impression.
Price-wise it falls in the top third of a shelf that stretches £1.98 to £56.00, with £7.13 in the middle. It costs more than most while rating around the middle, so the extra money needs to be buying something specific: pack size, brand you trust, or a detail below that matters to you.
Worked out from the 50 hair care products we track, not from the brand's own claims. How we rank →
Ratings gathered from public product pages at UK retailers. We link to each source so you can check.
Taken from the product listing via Amazon's product API. These are the seller's claims, not our test results.
Short on time? Our best hair care shortlist narrows this shelf down to a handful.
