Best hair serums June 2026
Finding the right hair serum can make a world of difference for shine, frizz control, and overall hair health. This guide helps you compare the top-rated hair serums on the market right now. Our independent rankings make it easy to see the pros and cons of each product, so you can choose the best one for your hair type and needs.
Last updated: 23 June 2026
Hair Oils: Top 5
1
Olaplex No.7 Bonding Oil 30ml
from £14.9913 stores
from £14.99
13 stores
2
Garnier Fructis Keratin Sleek Leave-in Serum 50ml
from £6.302 stores
from £6.30
2 stores
3
Kerastase Genesis Anti-Breakage Fortifying Serum 90ml
from £32.998 stores
from £32.99
8 stores
4
Kerastase K Nutritive 8H Magic Night Serum 90ml
from £34.798 stores
from £34.79
8 stores
5
The Ordinary Multi-Peptide Serum for Hair Density 60ml
from £10.996 stores
from £10.99
6 stores
Olaplex No.7 is a highly-regarded bonding oil that repairs, strengthens, and protects hair. It's a lightweight formula designed to increase shine, reduce frizz, and provide both heat and sun protection. Being vegan and suitable for a wide range of hair types, from colour-treated to curly, makes it a versatile choice.
Pros
Repairs and strengthens damaged hair
Provides both heat and UV protection
Adds shine and controls frizz
Vegan-friendly formula
Suitable for all hair types
Cons
Small bottle size (30ml)
Not focused on scalp health or hair growth
Garnier Fructis Keratin Sleek is a leave-in serum focused on taming frizz and softening dry, distressed hair. It also provides heat protection, making it a useful step before styling with hot tools. This serum is a straightforward option for those primarily looking to achieve a smoother, more manageable finish.
Pros
Effectively combats frizz
Offers heat protection for styling
Softens and moisturises dry hair
Cons
Fewer benefits than premium serums
Suits a narrower range of hair types
This serum from Kerastase's Genesis line is a fortifying treatment for both hair and scalp. It's specifically designed to strengthen weakened hair and prevent breakage associated with hair loss. Its leave-in formula works to improve hair resilience over time.
Pros
Targets hair loss and breakage
Can be applied directly to the scalp
Generous 90ml bottle size
Suits a wide variety of hair types
Cons
Not focused on shine or frizz control
Highly specialized for weakened hair
The Kerastase Nutritive 8H Magic Night Serum is an overnight treatment that works while you sleep. You apply it to dry or damp hair before bed, and its formula deeply nourishes, repairs, and detangles. It's designed to absorb fully by morning, leaving hair softer and shinier without needing to be rinsed out.
Pros
Works overnight for up to 8 hours
Packed with nourishing benefits
Large 90ml bottle
Absorbs without leaving residue
Cons
Designed for nighttime use only
Does not offer heat protection
The Ordinary's Multi-Peptide Serum is a concentrated formula designed to support scalp health and encourage the appearance of thicker, denser hair. It is a water-based, leave-in treatment that you apply directly to the scalp daily. As a vegan and silicone-free option, it's also a good choice for those with sensitive scalps.
Pros
Aims to improve hair density
Suitable for sensitive scalps
Vegan and silicone-free
Helps reduce hair loss
Cons
No styling benefits like shine or heat protection
Results require consistent, long-term use
Compare specifications
| Type | Hair oil | Hair serum | Hair serum, Scalp serum, Leave-in-serum | Hair serum, Overnight hair serum | Hair serum, Scalp serum |
|---|---|---|---|---|---|
| Hair type | Dry, Colour treated, Fine, Sun damaged, Blond/highlighted, Distressed, Curly/permed, Frizzy | Dry, Distressed, Frizzy | Normal, Dry, Colour treated, Fine, Blond/highlighted, Distressed, Curly/permed, Frizzy | Dry, Colour treated, Distressed, Curly/permed, Frizzy | Colour treated, Fine, Distressed |
| Quantity | 30 ml/g | 50 ml/g | 90 ml/g | 90 ml/g | 60 ml/g |
| Features | Shine, Moisturising/softening, Heat shielding, Repairing, Nourishing, Sun screen, Anti-frizz, Smoothing | Moisturising/softening, Heat shielding, Anti-frizz | Prevents hair loss, Strengthening | Shine, Moisturising/softening, Repairing, Nourishing, Anti-frizz | For sensitive scalp, Volume, Prevents hair loss, Strengthening, Stimulates hair growth |
How we built the list
The ranking is updated monthly and is based on data we collect from our own platform. Products that rank highly are popular with our users while also maintaining high quality according to editorial expert reviews. Specifically, we take into account how many users follow a product through price alerts or lists, how it is rated by experts and users, as well as how much traffic it generates to stores and how well it is represented in stores. No products are paid placements — the ranking is governed solely by data.
