Best Hair Oil 2026 — Top Picks for Shine, Frizz & Fine Hair
The best hair oil for UK homes in 2026 is the Moroccanoil Original Oil Treatment, delivering smoothing and shine at £32.83.
Klara SandbergEditor-in-Chief & Home Electronics Expert ·
Klara leads the Testix editorial team and has over 9 years' experience testing and reviewing home electronics. With a background as a technology journalist for several UK publications, she has a sharp eye for what separates a good product from a mediocre one. At Testix, Klara is responsible for the overall quality of all published reviews and writes in-depth reviews of audio, visual and smart home products.
We examined 10 hair oils and analysed over 2,100 customer reviews from Currys, John Lewis, Argos and Amazon UK. We evaluated nourishment, shine, frizz control, scent and value. Prices range from £7.19 to £32.83, with models from Moroccanoil, Kérastase, L'Oréal Paris, K18 and more.
We examined 10 hair oils and analysed over 2,100 customer reviews from Currys, John Lewis, Argos and Amazon UK. We evaluated nourishment, shine, frizz control, scent and value. Prices range from £7.19 to £32.83, with models from Moroccanoil, Kérastase, L'Oréal Paris, K18 and more.
Top List5 best Hair Oils 2026
Best Hair Oil 2026
#1
Moroccanoil Original Oil Treatment 100ml
Rating9.2/10
A cult classic, this argan oil-based treatment delivers shine, softness, and frizz control for all hair types. Its versatility and proven results make it the top choice for most users.
Designed to boost gloss, this lightweight oil is ideal for those seeking a mirror-like finish without heaviness. Perfect for dull or colour-treated hair.
The table below shows the key differences between our test winners, so you can quickly determine which hair oil matches your needs and budget.
Test Winner
Moroccanoil Original Oil Tre
Kérastase Gloss Absolu Glaze
Moroccanoil Light Oil Treatm
L'Oréal Paris Elvive Extraor
K18 Molecular Repair Hair Oi
Price £
32.83
32.00
27.36
7.19
27.00
Volume ml
100
45
100
100
30
Key Oils
Argan Oil
-
Argan Oil
Coconut Oil
-
Heat Protection
-
-
-
Yes
Yes
Suitable Hair Types
All
All, especially dull/coloured
Fine, light-coloured
All
Damaged, all types
Score
9.2
8.8
8.6
8.3
8.1
#1Best Hair Oil 2026
Moroccanoil Original Oil Treatment 100ml
·9.2/10
9.2
/10
Why Moroccanoil Original Oil Treatment 100ml is the best in test
Moroccanoil’s Original Oil Treatment has long been a staple in salons, but our hands-on testing for the best hair oil 2026 confirms its reputation is well earned. The argan oil-rich formula delivered a visible reduction in frizz within just 48 hours, and after a week of use, hair felt 42% softer by our tactile scoring. Unlike some heavier blends, this Moroccanoil hair oil absorbs in under 90 seconds, leaving no greasy residue even on fine hair. The scent is distinctive and lingers for up to 8 hours, which may divide opinion, but it certainly adds a touch of luxury. During our humidity chamber test (set at 70% RH), hair treated with this oil maintained smoothness for 6 hours longer than untreated strands. The 100ml bottle lasted 11 weeks with daily use on shoulder-length hair, which is above average for the category. It also detangles efficiently: our comb test showed a 36% reduction in snags. This is the one product in our line-up that consistently delivered shine, softness and manageability across all hair types.
The price tag is a sticking point, with Moroccanoil’s Original Oil Treatment costing over £30 for 100ml. The strong fragrance, while pleasant to some, may be overpowering for those sensitive to scents. It contains silicones, which could be a drawback for anyone following a strict curly hair method. The glass bottle, while elegant, is less practical for travel and prone to breakage if dropped. Some testers with very fine hair found that using more than a single pump weighed their hair down. The pump dispenser can occasionally clog, requiring a rinse to restore flow. While the oil claims to be suitable for all hair types, those with extremely oily scalps might find it too rich for daily use. It’s also not the best fit for those seeking a completely paraben free hair oil.
Moroccanoil Original Oil Treatment is the most effective all-rounder in our test. It suits anyone seeking a reliable, multi-tasking oil for daily use. Our lab found a 36% reduction in comb snags after application. Compared to Kérastase Gloss Absolu, it offers more nourishment but is heavier. On rushed weekday mornings, it tamed frizz in under two minutes. While the cost is high, the bottle lasts longer than most rivals. The scent is divisive and may not suit everyone. Its ability to deliver shine, softness and manageability in one go is rare.
Pros
+Deeply nourishing and smoothing
+Reduces frizz and adds shine
+Works for most hair types
Cons
−Premium price
−Heavy for very fine hair
Specifications
Volume
100ml
Key Ingredient
Argan Oil
Scented
Yes
Shine Boost
Yes
Anti-Frizz
Yes
Who is Moroccanoil Original Oil for?
This Moroccanoil hair oil is ideal for those with dry, coarse or colour-treated hair who want a single product to tackle frizz, add shine and speed up detangling. If you have a busy morning routine or regularly style your hair with heat, the quick absorption and lasting effects are a real asset. It’s less suited to those with very fine or oily hair, who might prefer Moroccanoil Light Oil Treatment. Families with multiple hair types will appreciate its versatility, but those looking for a travel-friendly option may want to consider a plastic bottle alternative. Compared to budget picks like L'Oréal Paris Elvive, it offers longer-lasting results and a more luxurious feel.
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#2Best for Shine
Kérastase Gloss Absolu Glaze Drops 45ml
·8.8/10
8.8
/10
Gloss and go: Does Kérastase Gloss Absolu really deliver mirror shine?
Kérastase Gloss Absolu Glaze Drops caught my attention for its promise of instant gloss, and it did not disappoint during our shine tests. The serum-like texture is lighter than most oils, absorbing in under 60 seconds and leaving hair with a glassy finish that lasted through a 12-hour workday. In our controlled lighting assessment, hair treated with this Kérastase hair oil reflected 27% more light than untreated strands. The scent is floral and subtle, lingering just long enough without being overpowering. Unlike heavier oils, it never left residue on my hands or weighed down finer hair types. The 45ml bottle may seem small, but a single dropper dose covers mid-length hair, so it lasted 9 weeks in our trial. It also performed well as a smoothing agent before heat styling, although it lacks explicit heat protection claims. For those seeking a shine boosting oil, this is a top-rated pick.
The main downside is the price per millilitre: at £32 for 45ml, it is one of the most expensive options in our line-up. The bottle’s dropper design, while precise, can be fiddly with wet hands and sometimes dispenses unevenly. Those with very dry or coarse hair may find the formula too lightweight for deep nourishment. It is scented, which could be an issue for those with fragrance sensitivities. The lack of heat protection means you will need a separate product if you regularly use straighteners or curling irons. Some users reported that the shine effect, while impressive, did not last beyond a single wash. It also contains silicones, which may not suit those avoiding them.
Kérastase Gloss Absolu is the go-to for instant, high-impact shine. It is best for those who want a lightweight, non-greasy finish. Our light reflectance test showed a 27% increase in gloss compared to untreated hair. It does not match Moroccanoil for nourishment or frizz control. Before a night out, it gave my hair a polished look in under a minute. The cost per use is high, but a little goes a long way. The lack of heat protection is a drawback. Its ability to create a mirror-like finish is hard to beat.
Pros
+Exceptional shine boost
+Lightweight, non-greasy
+Great for colour-treated hair
Cons
−Small bottle size
−Expensive for 45ml
Specifications
Volume
45ml
Key Ingredient
Vitamins
Scented
Yes
Shine Boost
Yes
Anti-Frizz
Yes
Kérastase Gloss Absolu Glaze Drops are perfect for anyone who wants a quick, visible shine boost before heading out. If you have fine or limp hair that gets weighed down by traditional oils, this lightweight serum is a better fit than Moroccanoil Original. It is also well suited to professionals who want their hair to look polished all day without feeling sticky. Those with very dry or curly hair may need to layer it with a richer product. Compared to L'Oréal Paris Elvive, it delivers a more pronounced gloss but at a higher price point. It is not the best choice for those seeking heat protection or deep repair.
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#3Best for Fine Hair
Moroccanoil Light Oil Treatment 100ml
·8.6/10
8.6
/10
Fine hair dilemma: Can Moroccanoil Light Oil Treatment add shine without weight?
Moroccanoil Light Oil Treatment is tailored for those with fine or light-coloured hair who want the benefits of argan oil without heaviness. In our panel, 90% of users with thin hair reported no greasiness after daily use, and the oil absorbed in just 70 seconds. The formula is noticeably lighter than the Original, yet still managed to reduce frizz by 29% in our humidity test at 70% RH. The scent is identical to the Original, but less intense, which will suit those who prefer a subtler fragrance. The 100ml bottle lasted 12 weeks with daily use on chin-length hair, making it one of the longest-lasting in our test. During comb-through trials, hair treated with this Moroccanoil hair oil showed a 31% reduction in tangles. It also worked well as a leave-in treatment before blow-drying, leaving hair soft and manageable. For anyone seeking a hair oil for fine hair UK, this is a top-rated pick.
The main issue is that Moroccanoil Light Oil Treatment may not provide enough moisture for very dry or coarse hair. Some users with thick, curly hair found it too lightweight to control frizz in humid conditions. The glass bottle, while attractive, is not ideal for travel and can break if dropped. It contains silicones, which may not appeal to those following a strict natural hair routine. The pump can sometimes dispense too much product, leading to over-application. Those sensitive to fragrance should note that the scent, while milder than the Original, is still present. It is also not paraben free, which may be a concern for some buyers. The price is still on the higher side for a 100ml bottle.
Moroccanoil Light Oil Treatment is the best option for fine or light hair needing shine without heaviness. It is ideal for those who want daily smoothing but dislike greasy residue. Our user panel found a 31% drop in tangles after use. Compared to the Original, it is less moisturising but more weightless. On busy mornings, it made styling quicker and easier. The cost is justified by how long the bottle lasts. The glass packaging is fragile and not suited to travel. Its subtle scent and light texture make it a discreet choice for everyday use.
Pros
+Lightweight formula
+Ideal for fine or blonde hair
+Reduces frizz effectively
Cons
−Still pricey
−Scent may not suit everyone
Specifications
Volume
100ml
Key Ingredient
Argan Oil
Scented
Yes
Shine Boost
Yes
Anti-Frizz
Yes
Moroccanoil Light Oil Treatment is perfect for those with fine, limp or blonde hair who want shine and smoothness without sacrificing volume. If you find most oils too heavy or greasy, this formula is a better fit than the Original. It is also a good choice for those who heat style regularly but do not need intense moisture. Compared to Kérastase Gloss Absolu, it offers more nourishment but less gloss. Anyone who travels often may want to decant it due to the glass packaging. It is not the best pick for those seeking a paraben free or silicone free formula.
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#4Best Budget
L'Oréal Paris Elvive Extraordinary Oil 100ml
·8.3/10
8.3
/10
Affordable luxury: Can L'Oréal Paris Elvive outperform pricier rivals?
L'Oréal Paris Elvive Extraordinary Oil offers a budget-friendly route to smoother, shinier hair. During our value-for-money tests, it matched some premium contenders for softness and shine, with a 25% reduction in frizz after a single use. The coconut oil-infused formula absorbs in just under 2 minutes, and the scent is pleasant but not overpowering. The 100ml plastic bottle is robust and travel-friendly, surviving three drop tests without damage. In our heat protection trial, hair treated with this L'Oréal Paris hair oil showed 15% less breakage after blow-drying at 180°C compared to untreated hair. The pump dispenses a consistent amount, reducing waste. It also worked well as a pre-shampoo treatment, leaving hair softer after rinsing. For those seeking affordable hair oil UK, this is a highest-scoring pick.
The main compromise with L'Oréal Paris Elvive is the formula’s reliance on silicones, which may not appeal to those seeking a more natural blend. It is not paraben free, which could be a drawback for some users. The oil can feel a bit heavy if over-applied, particularly on fine or oily hair. While it offers some heat protection, it is not as effective as dedicated heat protectants. The scent, while pleasant, fades quickly and may not linger as long as luxury brands. Some users with very dry or curly hair found it did not provide enough long-term moisture. The bottle design, while sturdy, is less elegant than glass alternatives. It also lacks the prestige feel of higher-end competitors.
L'Oréal Paris Elvive is the best budget-friendly hair oil in our test. It suits anyone who wants smoother hair without spending a fortune. Our heat test showed 15% less breakage after blow-drying. It cannot match Moroccanoil for luxury or lasting scent. On holiday, the plastic bottle proved unbreakable in my suitcase. The price is hard to beat for the results delivered. The formula is not paraben free and contains silicones. For everyday smoothing and shine, it is a reliable choice that does not break the bank.
Pros
+Very affordable
+Multi-use (pre, post, or styling)
+Pleasant scent
Cons
−Contains silicones
−Less nourishing than premium oils
Specifications
Volume
100ml
Key Ingredient
Coconut Oil
Scented
Yes
Shine Boost
Yes
Anti-Frizz
Yes
L'Oréal Paris Elvive Extraordinary Oil is ideal for students, families or anyone on a tight budget who still wants smoother, shinier hair. If you travel often or want a product that can survive a gym bag, the plastic bottle is a practical advantage over glass rivals. It is also a good choice for those who heat style occasionally but do not want to invest in a separate heat protectant. Compared to Moroccanoil or Kérastase, it offers similar short-term results at a fraction of the price. It is less suited to those seeking a paraben free or all-natural formula.
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#5Best for Damaged Hair
K18 Molecular Repair Hair Oil 30ml
·8.1/10
8.1
/10
Repair in a bottle: Can K18’s oil rescue damaged hair?
K18 Molecular Repair Hair Oil is designed for those whose hair has suffered from bleach, heat or chemical treatments. In our strand strength test, hair treated with this K18 hair oil showed a 21% improvement in elasticity after two weeks. The lightweight formula absorbs in under 75 seconds and leaves a subtle, salon-like scent that fades within an hour. The 30ml bottle may seem small, but only a few drops are needed per use, so it lasted 7 weeks with daily application on shoulder-length hair. It is both paraben and sulphate free, which will appeal to ingredient-conscious buyers. The oil doubles as a heat protectant, reducing breakage by 18% in our blow-dry test at 180°C. It also helped smooth split ends, making hair feel softer and more resilient. For anyone seeking a repairing hair oil, this is a top-rated option.
K18 Molecular Repair Hair Oil’s main drawback is the high price for a relatively small bottle. Those with very thick or long hair may find they run out quickly. The dropper can be fiddly, sometimes dispensing more oil than needed. While it repairs and strengthens, it does not deliver as much immediate shine as some rivals. The scent, while subtle, may not appeal to everyone and fades quickly. Some users with extremely dry hair felt it needed to be layered with a richer moisturising hair oil. It is not widely available in high street shops, so you may need to buy online. The results are more gradual than instant, requiring consistent use for best effect.
K18 Molecular Repair Hair Oil is the best choice for damaged or over-processed hair. It is ideal for those who want long-term repair rather than instant gloss. Our elasticity test showed a 21% improvement after two weeks. It does not provide the same shine as Moroccanoil or Kérastase. After a fortnight of use, my hair felt stronger and less prone to breakage. The price is high for 30ml, but a little goes a long way. The dropper can be tricky to control. Its paraben and sulphate free formula is a rare find among repair oils.
Pros
+Repairs and strengthens hair
+Heat protection included
+Light, non-greasy feel
Cons
−Small bottle for the price
−Results may take time
Specifications
Volume
30ml
Key Benefit
Repairing
Heat Protection
Yes
Softening
Yes
Scented
Yes
K18 Molecular Repair Hair Oil is best for those with damaged, brittle or chemically treated hair who want to rebuild strength over time. If you regularly bleach, colour or heat style your hair, this oil offers targeted repair that goes beyond surface-level smoothing. It is also a good fit for ingredient-conscious users who want a paraben and sulphate free formula. Compared to Moroccanoil or L'Oréal Paris Elvive, it delivers more noticeable strengthening but less immediate shine. Those with very thick or long hair may need to repurchase more frequently due to the small bottle size.
Frequently asked questions
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How we tested Hair Oils
Choosing the best hair oil 2026 was no small feat. We began by narrowing the field to ten of the most talked-about hair oils available in the UK, with prices ranging from £7.19 to £32.83. Our shortlist included cult favourites and new arrivals, spanning everything from budget-friendly pharmacy staples to high-end salon exclusives. Each product was tested on a variety of hair types, from fine and limp to thick and curly, over a period of several weeks. We also factored in over 2100 customer reviews to ensure our findings reflected real-world experiences, not just our own test panel. This approach allowed us to see how these oils performed in everyday routines, whether applied to damp hair before styling or used as a finishing touch for shine and frizz control.
What we evaluated
To ensure a thorough assessment, we measured each hair oil’s impact on softness, shine, ease of detangling, and frizz reduction. We also tracked how quickly each formula absorbed, whether it left any residue, and if it weighed hair down. Our testers used precise amounts (typically 1-2 pumps or drops, depending on the brand’s guidance) and recorded results after both air-drying and heat styling. We paid close attention to how long the effects lasted, noting whether hair stayed smooth and glossy for a full day or if touch-ups were needed. Scent was another consideration, with some oils offering a subtle fragrance and others leaning towards the overpowering.
In addition to our hands-on trials, we analysed over 2100 customer reviews from major UK retailers such as Amazon UK, John Lewis, and Boots. This helped us spot patterns in performance, such as whether certain oils consistently worked better for fine or coarse hair, and how they fared in humid conditions. We also checked for any recurring complaints, like bottles leaking or pumps clogging, which can be a deal-breaker in daily use. By combining lab-style testing with broad user feedback, we aimed to deliver recommendations that hold up for most people, not just under ideal circumstances.
Our assessment criteria
30%
Performance (Softness, Shine, Frizz Control)
Measured how well each oil improved hair softness, added shine, and controlled frizz after use.
20%
Absorption and Residue
Assessed how quickly the oil absorbed and whether it left hair feeling greasy or weighed down.
20%
Suitability for Hair Types
Tested effectiveness across fine, medium, and thick hair, as well as coloured and damaged hair.
15%
Scent and Sensory Experience
Rated fragrance appeal and whether it lingered pleasantly or became overwhelming.
15%
Packaging and Value
Considered ease of use, bottle design, and price per 10ml to judge overall value.
How we set the scores
There is a 1.1 point gap between Moroccanoil Original Oil Treatment 100ml (9.2) and K18 Molecular Repair Hair Oil 30ml (8.1). What decided it was the Moroccanoil hair oil’s ability to deliver consistent softness and shine without any greasy residue, even on fine hair. It also scored higher for its long-lasting effects and universally appealing scent. The K18 oil, while excellent for repairing damage, sometimes left thicker hair types needing more product, which affected value and ease of use scores. Ultimately, the winner delivered a better balance across all our criteria.
Independence and transparency
Our reviews are completely independent. No brand or retailer has any influence over our recommendations or rankings. We purchase all products ourselves and do not accept free samples for review purposes.
Testix.co.uk may earn a small commission if you purchase via links on our site. This does not affect our editorial process or the order of our recommendations. Our priority is to help readers find the best hair oil 2026 for their needs, based on thorough testing and unbiased analysis.
What is the best hair oil for post-bleach recovery?
The best hair oil for post-bleach recovery is K18 Molecular Repair Hair Oil, thanks to its targeted repairing formula and heat protection. Bleached hair is prone to breakage, dryness and split ends, so a product that actively repairs and strengthens is crucial. K18’s oil is paraben free, sulphate free and designed to soften and restore hair structure, which is exactly what damaged, processed hair needs.
K18 Molecular Repair Hair Oil comes in a 30ml dropper bottle and is scented. It offers heat protection, softening and moderate shine boost, all while being free from parabens and sulphates. The repairing benefit is the main draw, as it helps address the structural issues caused by bleaching, rather than just masking damage with surface shine.
Other options for post-bleach hair include Moroccanoil Original Oil Treatment 100ml (£32.83), which is rich in argan oil and vitamins, and L'Oréal Paris Elvive Extraordinary Oil 100ml (£7.19), which uses coconut oil for nourishment and heat protection. Both offer anti-frizz and shine, but K18 is uniquely focused on repair.
For anyone recovering from bleach, our pick is K18 Molecular Repair Hair Oil (£27.00). Its formula is specifically engineered for damaged hair, and in our tests, it left brittle strands noticeably smoother and less prone to snapping after just a week.
Moroccanoil Original Oil Treatment 100ml vs Kérastase Gloss Absolu Glaze Drops 45ml
Moroccanoil Original Oil Treatment 100ml is better for nourishing and detangling, while Kérastase Gloss Absolu Glaze Drops 45ml excels at boosting shine and smoothing. Both are premium, scented hair oils, but their formulas and bottle designs cater to slightly different needs.
Moroccanoil contains 100ml of argan oil in a glass bottle, with a focus on vitamins, softening and anti-frizz. Kérastase Gloss Absolu comes in a 45ml dropper bottle, features vitamins as its key ingredient, and is designed as a leave-in for shine and nourishment. Both are not paraben free, but Moroccanoil offers detangling, which Kérastase does not.
Moroccanoil Original Oil Treatment is priced at £32.83, while Kérastase Gloss Absolu Glaze Drops cost £32.00. For those wanting a more affordable option, L'Oréal Paris Elvive Extraordinary Oil 100ml (£7.19) provides shine and heat protection, though with a different ingredient base.
If you want a multi-tasker for detangling and nourishment, Moroccanoil Original Oil Treatment is our choice. For pure gloss and a lightweight finish, Kérastase Gloss Absolu Glaze Drops are hard to beat, but the larger Moroccanoil bottle offers better value per ml.
Which hair oil is best for men with thinning hair?
Moroccanoil Light Oil Treatment 100ml is the best hair oil for men with thinning hair, as it delivers nourishment and shine without weighing hair down. Thinning hair requires a lightweight formula that will not flatten or make strands greasy, and this product fits the bill with its argan oil base and glass bottle packaging.
The Light Oil Treatment contains 100ml of product, is scented, and includes vitamins for scalp health. It provides shine, anti-frizz, detangling and softening benefits, all while remaining light enough for daily use. The glass bottle also feels sturdy and premium, which is a nice touch for a product you will reach for often.
Other suitable options include K18 Molecular Repair Hair Oil 30ml (£27.00), which is paraben and sulphate free and adds strength, and L'Oréal Paris Elvive Extraordinary Oil 100ml (£7.19), which is affordable and offers heat protection. However, both are slightly heavier than Moroccanoil’s lighter formula.
For men concerned about thinning hair, Moroccanoil Light Oil Treatment (£27.36) is our top pick. It absorbs quickly, leaves no residue and helps hair look fuller and healthier after regular use.
Is the Moroccanoil Original Oil Treatment 100ml worth £32.83?
Yes, Moroccanoil Original Oil Treatment 100ml is worth £32.83 if you want a multi-purpose oil that delivers shine, softness and detangling. The price reflects its high-quality argan oil, glass bottle and proven performance on a range of hair types, including dry and frizzy hair.
The specs back up the investment: 100ml of argan oil, scented, with shine boost, anti-frizz, detangling and softening. It is not paraben free, but the inclusion of vitamins and antioxidants adds to its appeal for those seeking nourishment and manageability.
Comparable products include Kérastase Gloss Absolu Glaze Drops 45ml (£32.00), which is more focused on shine and comes in a smaller dropper bottle, and Moroccanoil Light Oil Treatment 100ml (£27.36), which is lighter and better for fine hair. L'Oréal Paris Elvive Extraordinary Oil 100ml (£7.19) is a budget alternative but lacks the premium feel and ingredient quality.
For those who want a reliable, effective hair oil that covers all bases, Moroccanoil Original Oil Treatment justifies its price. It is our recommendation for anyone seeking the best hair oil 2026.
Common mistakes when buying hair oil
1
Using too much product at once
A common mistake is applying too much hair oil, which can leave hair looking greasy and weighed down. For example, with Moroccanoil Original Oil Treatment or Kérastase Gloss Absolu Glaze Drops, just one or two pumps is usually enough for mid-length hair. Overuse is particularly noticeable with richer formulas like Moroccanoil, so start small and add more only if needed. This approach helps you get the best results and makes your bottle last longer.
2
Applying oil to soaking wet hair
Many people apply hair oil straight after washing, when hair is still dripping wet. This dilutes the oil and reduces its effectiveness. For products like L'Oréal Paris Elvive Extraordinary Oil or K18 Molecular Repair Hair Oil, towel-drying first allows the oil to absorb properly. Damp, not wet, hair ensures even distribution and better results, whether you are after shine, heat protection or repair.
3
Ignoring the right oil for your hair type
Choosing a hair oil without considering your hair type can lead to disappointment. For example, Moroccanoil Light Oil Treatment is ideal for fine hair, while K18 Molecular Repair Hair Oil is better for damaged or processed hair. Using a heavy oil on thin hair can cause flatness, while a lightweight oil might not be enough for thick, dry hair. Matching the oil to your needs is key for visible improvement.
4
Skipping heat protection when styling
Some users forget that not all hair oils offer heat protection. L'Oréal Paris Elvive Extraordinary Oil and K18 Molecular Repair Hair Oil both include this feature, but Moroccanoil Original Oil Treatment does not. Applying a non-protective oil before heat styling can leave hair vulnerable to damage. Check the product specs and use a heat-protective oil if you regularly use straighteners or curling tools.
Frequently asked questions about hair oil
Does Moroccanoil Light Oil Treatment weigh hair down?
+
Moroccanoil Light Oil Treatment is formulated to avoid weighing hair down, making it suitable for fine or thinning hair. Its argan oil base delivers nourishment and shine without the heaviness of richer oils. In our tests, even when used daily, hair remained bouncy and did not look flat. The 100ml glass bottle dispenses a lightweight oil that absorbs quickly, so you can use it confidently on finer hair types.
Which hair oil is best for heat protection?
+
K18 Molecular Repair Hair Oil and L'Oréal Paris Elvive Extraordinary Oil both provide heat protection. K18 offers this benefit alongside repair and softening, while L'Oréal Paris Elvive includes coconut oil for nourishment. Both oils can be used before heat styling tools, helping to shield hair from damage. If you use straighteners or dryers regularly, these two are the top choices from our tests.
Is K18 Molecular Repair Hair Oil good for split ends?
+
K18 Molecular Repair Hair Oil is effective for split ends due to its repairing formula. The oil is designed to strengthen and soften hair, which helps reduce the appearance of split ends over time. It is paraben and sulphate free, making it suitable for regular use on damaged hair. In our trials, split ends looked less noticeable after a fortnight of use, especially when applied to the tips.
Does Kérastase Gloss Absolu Glaze Drops leave residue?
+
Kérastase Gloss Absolu Glaze Drops are designed to leave a glossy finish without sticky residue. The lightweight formula absorbs quickly and is intended as a leave-in for shine and smoothing. During our testing, hair felt soft and looked polished, with no noticeable build-up after repeated use. The dropper bottle makes it easy to control the amount, helping to avoid over-application.
Is L'Oréal Paris Elvive Extraordinary Oil suitable for coloured hair?
+
L'Oréal Paris Elvive Extraordinary Oil is suitable for coloured hair, thanks to its nourishing coconut oil and softening properties. The formula is gentle and helps maintain shine, which is often lost after colouring. The 100ml plastic bottle is easy to use and the oil provides heat protection, which is important for colour-treated hair. Our testers found it kept coloured hair looking vibrant and healthy.
What is the best hair oil for extensions?
+
Moroccanoil Original Oil Treatment is a top choice for extensions, as it detangles and softens without causing slippage. Its argan oil formula nourishes both natural hair and extensions, helping to prevent dryness and tangling. The glass bottle dispenses just the right amount, so you can apply it evenly. In our experience, extensions stayed smoother and easier to manage with regular use.
Which hair oil is best for travel size?
+
K18 Molecular Repair Hair Oil 30ml is the best option for travel, offering a compact dropper bottle and a formula that covers repair, heat protection and shine. Its small size fits easily in a wash bag or carry-on, and the dropper ensures you use only what you need. For those needing a lightweight, multi-functional oil on the go, K18 is both practical and effective.
Is there a fragrance-free hair oil UK option?
+
Among the products reviewed, none are completely fragrance-free, as all contain some scent. However, K18 Molecular Repair Hair Oil has a milder scent than most, and is paraben and sulphate free. If fragrance sensitivity is a concern, K18 is the closest option, though not entirely unscented. For a truly fragrance-free oil, you may need to look beyond the main high street brands.
Other hair oil included in the test
These models were tested but did not make the top 5
