Best Hair Serums November 2026
Compare the most popular hair serums and oils to find the best formula for your hair type and routine. This independent guide highlights key benefits, trade-offs, and features to help you choose with confidence.
Last updated: 1 November 2026
The list is unchanged since the last update.
Hair Oils: Top 5
1
Olaplex No.7 Bonding Oil 30ml
from £14.9911 stores
from £14.99
11 stores
2
Kerastase K Nutritive 8H Magic Night Serum 90ml
from £30.726 stores
from £30.72
6 stores
3
Kerastase Genesis Anti-Breakage Fortifying Serum 90ml
from £26.996 stores
from £26.99
6 stores
4
Kerastase Gloss Absolu Glaze Drops Hair Oil 45ml
from £35.187 stores
from £35.18
7 stores
5
The Ordinary Multi-Peptide Serum for Hair Density 60ml
from £16.276 stores
from £16.27
6 stores
Olaplex No.7 Bonding Oil is a concentrated styling oil designed to restore shine and softness while repairing distressed strands. It shields hair from heat and sun damage, making it a versatile finishing step for daily routines.
£20.72
£0.69/ml/g
In stock
£21.69
£0.72/ml/g
In stock
£22.00
£0.73/ml/g
In stock
Pros
Offers heat and sun protection
Vegan and sulfate-free formula
Controls frizz and enhances shine
Suitable for all hair types
Cons
Small 30 ml bottle
Not designed for scalp application
Kerastase Nutritive 8H Magic Night Serum works overnight to deeply nourish and soften dry, distressed hair. It absorbs into lengths and ends to eliminate frizz and leave strands manageable by morning.
£30.72
£0.34/ml/g
In stock
Pros
Overnight leave-in treatment
Large 90 ml bottle
Intensely moisturizes dry hair
Reduces frizz and boosts shine
Cons
Not formulated for hair loss or growth
Heavier formula not aimed at fine hair
Kerastase Genesis Anti-Breakage Fortifying Serum is a daily leave-in treatment aimed at strengthening weak strands and stimulating growth. It supports the scalp environment to noticeably reduce hair fall from breakage.
£26.99
£0.30/ml/g
In stock
£44.50
£0.49/ml/g
Unknown stock
£46.51
£0.52/ml/g
In stock
Pros
Targets hair loss and strengthens roots
Generous 90 ml bottle size
Vegan leave-in formula
Works on all hair textures
Cons
Does not provide heat protection
Focuses on roots rather than high shine
Kerastase Gloss Absolu Glaze Drops Hair Oil delivers a glossy finish while smoothing distressed, dry strands. It tames unwanted frizz and seals in moisture for a sleek, nourished appearance.
Pros
Delivers high shine and gloss
Smooths frizz and softens dry hair
Targeted repairing action
Cons
Smaller 45 ml quantity
Lacks heat shield protection
Not designed for fine or thinning hair
The Ordinary Multi-Peptide Serum for Hair Density is a lightweight scalp treatment crafted to support thicker, fuller-looking hair. Its silicone-free formula delivers active peptides to the scalp to reinforce weak and fine strands.
£16.27
£0.27/ml/g
In stock
Pros
Silicone-free and vegan formula
Supports hair density and volume
Gentle on sensitive scalps
Strengthens fine and distressed hair
Cons
Does not add high surface shine
No heat shielding properties
Compare specifications
| Type | Hair oil | Hair serum, Scalp serum, Overnight hair serum | Hair serum, Scalp serum, Leave-in-serum | Hair oil | Hair serum, Scalp serum |
|---|---|---|---|---|---|
| Hair type | Dry, Colour treated, Fine, Sun damaged, Blond/highlighted, Distressed, Curly/permed, Frizzy | Dry, Colour treated, Distressed, Curly/permed, Frizzy | Normal, Dry, Colour treated, Fine, Blond/highlighted, Distressed, Curly/permed, Frizzy | Dry, Distressed, Frizzy | Colour treated, Fine, Distressed |
| Quantity | 30 ml/g | 90 ml/g | 90 ml/g | 45 ml/g | 60 ml/g |
| Features | Shine, Moisturising/softening, Heat shielding, Repairing, Nourishing, Sun screen, Anti-frizz, Smoothing | Shine, Moisturising/softening, Repairing, Nourishing, Anti-frizz | Prevents hair loss, Strengthening, Stimulates hair growth | Shine, Moisturising/softening, Repairing, Nourishing, Anti-frizz | For sensitive scalp, Volume, Prevents hair loss, Moisturising/softening, Strengthening, Stimulates hair growth |
How we create the list
The ranking is updated monthly and is based on data we collect from our own platform. Products that rank highly are popular among our users while also maintaining high quality according to editorial expert assessments. Specifically, we weigh how many users follow the product via 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 retail. The texts on this page are AI-generated and created to give you a quick and clear overview. No products are paid placements – the ranking is driven solely by data.
