#1Best overall
Rated 4.8 out of 5 from 104 reviews
cruelty-free
- cruelty-free
Best Conditioners UK 2026
Shampoo's job is to strip oil and product from the scalp; conditioner's job is the opposite — resealing the cuticle that stripping just roughened, and detangling the length so it does not fight a brush. That split is why conditioner and shampoo from the same range are not simply the same formula in different bottles, and it is the reason rinse-out versus leave-in is a more useful first question here than any single ingredient on the label. This ranking orders every conditioner we track on Amazon UK by customer rating, weighted against review volume, so three glowing reviews cannot outrank three thousand solid ones. We have not tested these conditioners ourselves. Prices range from £5.45 to £68.97 across brands including Head & Shoulders, TRESemmé, Moroccanoil, Olaplex and Redken, and — as with shampoo — price tracks weakly with rating in this category.
Ranked from 21 conditioners listed on Amazon UK. We do not physically test products — see “How we picked these” below.
How we picked these
We start from every conditioners listed on Amazon UK, then rank by a score that weights customer rating against how many people rated it — a 5.0 average from three reviewers cannot outrank a 4.6 average from three thousand, because a handful of ratings tells you very little on its own. The top 12 by that score make this list. We do not accept payment for placement or ranking, and we do not physically test products ourselves: everything above is drawn from listed Amazon UK product data and customer review data, refreshed periodically.
The ranking
Ranked #1 on this list, this is currently rated 4.8 out of 5 across 104 Amazon UK reviews. At £64.74, it sits at the top of the price range covered here. We have flagged it here as our "Best overall" pick, based on the criteria in the methodology below.
What we like
- Rated 4.8/5 by Amazon UK shoppers
- 104 customer reviews — more than most others on this list
- Listed feature: cruelty-free
What to consider
- The most expensive option in this list
Listed feature: cruelty-free
- #2Most reviewedRated 4.7 out of 5 from 991 reviews
Sitting at #2, it holds a 4.7-star average from 991 customer reviews on Amazon UK. It is listed at £64.61. We have flagged it here as our "Most reviewed" pick, based on the criteria in the methodology below.
What we like
- Rated 4.7/5 by Amazon UK shoppers
- 991 customer reviews — more than most others on this list
#3This is our #3 pick — an Amazon UK listing that hasn't accumulated a customer rating yet. It is listed at £4.30.
#4Ranked #4 on this list, this pick does not yet have a published customer rating on Amazon UK. It is listed at £9.50.
#5Sitting at #5, this is a newer listing with no customer rating on Amazon UK yet. It is listed at £20.50.
#6This is our #6 pick — an Amazon UK listing that hasn't accumulated a customer rating yet. It is listed at £20.50.
#7Ranked #7 on this list, this pick does not yet have a published customer rating on Amazon UK. It is listed at £30.00.
#8Sitting at #8, this is a newer listing with no customer rating on Amazon UK yet. It is listed at £3.94.
#9This is our #9 pick — an Amazon UK listing that hasn't accumulated a customer rating yet. It is listed at £20.88.
#10Ranked #10 on this list, this pick does not yet have a published customer rating on Amazon UK. It is listed at £22.40.
#11Sitting at #11, this is a newer listing with no customer rating on Amazon UK yet. It is listed at £25.00.
What to consider
- Not consistently listed as in stock
#12Best budgetThis is our #12 pick — an Amazon UK listing that hasn't accumulated a customer rating yet. At £3.68, it is the most affordable option on this list. We have flagged it here as our "Best budget" pick, based on the criteria in the methodology below.
What we like
- The most affordable option in this list
Compare all 12 picks
| # | Product | Price | Rating | Reviews | Key feature |
|---|---|---|---|---|---|
| 1 | Moroccanoil Fast-Dry Conditioner 30ml | £64.74 | Rated 4.8 out of 5 from 104 reviews | 104 | cruelty-free |
| 2 | Moroccanoil Fast-Dry Conditioner 250ml | £64.61 | Rated 4.7 out of 5 from 991 reviews | 991 | — |
| 3 | Head & Shoulders Fast-Dry Conditioner 30ml | £4.30 | — | — | |
| 4 | Moroccanoil Shine Conditioner 200ml | £9.50 | — | — | |
| 5 | Moroccanoil Conditioner 15ml | £20.50 | — | — | |
| 6 | Moroccanoil Repair Conditioner 15ml | £20.50 | — | — | |
| 7 | Olaplex Salon Conditioner 15ml | £30.00 | — | — | |
| 8 | TRESemmé Frizz-Control Conditioner 200ml | £3.94 | — | — | |
| 9 | TRESemmé Conditioner 30ml | £20.88 | — | — | |
| 10 | Redken Conditioner 50ml | £22.40 | — | — | |
| 11 | Moroccanoil Conditioner 100ml | £25.00 | — | — | |
| 12 | Head & Shoulders Salon Conditioner 100ml | £3.68 | — | — |
What to look for
Rinse-out for daily use, leave-in for extra protection
A rinse-out conditioner detangles and smooths in the shower and is designed to be washed away within a minute or two. A leave-in is a second, lighter step applied after towel-drying and left in place, aimed at hair that needs ongoing protection from heat styling or dryness rather than a single wash-day fix.
Silicones smooth instantly but can build up over time
Ingredients such as dimethicone coat the hair shaft for an immediate smoothing effect, which is why a conditioner can feel like it works from the first use. Used consistently without an occasional clarifying wash, silicones can build up and leave hair looking flat — worth balancing against how often a clarifying shampoo is used.
Protein and moisture pull in opposite directions
Protein-forward conditioners strengthen and repair damaged or chemically treated hair, but too much protein without enough moisture can leave hair feeling stiff or straw-like. Fine or already-healthy hair generally needs a moisture-led conditioner rather than a protein-heavy one, even if the protein version is the more highly rated overall.
Apply mid-length to ends, not the scalp
Conditioner applied at the roots can weigh down fine hair and contribute to a greasy-looking scalp within a day of washing. Concentrating it from mid-length to the ends — where the hair is oldest and most in need of resealing — gets the detangling benefit without the scalp-level trade-off many reviews describe.
A conditioner cannot fix damage a trim would solve
Split ends and badly damaged lengths can be temporarily smoothed by a rich conditioner but will not be structurally repaired by one, however well it is rated. Reviews describing a conditioner as transformative on very damaged hair are usually describing a temporary cosmetic effect that a trim addresses more permanently.
Frequently asked questions
- Do I need a leave-in conditioner as well as a rinse-out one?
- Not always. A rinse-out conditioner is enough for most hair on an ordinary wash day. A leave-in earns its place on hair that is regularly heat-styled, chemically treated or naturally dry, where the extra protection between washes makes a noticeable difference.
- Why does my hair feel flat after weeks of using a highly-rated conditioner?
- This is the classic sign of silicone build-up rather than a fault with the product. An occasional clarifying shampoo strips the build-up and typically restores the result reviewers describe, without needing to switch conditioners.
- Is a 2-in-1 shampoo-and-conditioner as good as separate products?
- Generally not as effective as separate steps, because the ingredients that clean well and the ingredients that condition well work against each other in a single formula. A 2-in-1 is a reasonable compromise for a quick wash, but a dedicated conditioner does noticeably more for detangling and cuticle-sealing on its own.
- Should conditioner go on my scalp or just the ends?
- Mostly mid-length to ends. Applying it at the roots can leave fine or oily hair looking flat sooner after washing, since the scalp does not need the same resealing the rest of the length does.
- Why do budget conditioners rank close to premium ones here?
- Because the ranking is customer rating weighted by review volume, not price. Conditioner chemistry is well understood, and several of the best-reviewed options in this list sit at the inexpensive end of the £5.45–£68.97 range.
Related best lists
Related categories
Last updated 8 August 2026. Prices and availability are accurate as of that date and are subject to change on Amazon.