Best Hair Serums September 2026
Explore our independent ranking of top hair serums to find the right match for your routine. Compare key features, benefits, and trade-offs across leading formulas designed for hair density, repair, and scalp nourishment. Easily check prices and specifications to choose the serum that suits your hair type.
Last updated: 1 September 2026
Kerastase K Nutritive 8H Magic Night Serum 90ml climbed 1 position
The Ordinary Multi-Peptide Serum for Hair Density 60ml climbed 1 position
Hair Oils: Top 5
1
Kerastase Genesis Anti-Breakage Fortifying Serum 90ml
from £26.996 stores
from £26.99
6 stores
2
Kerastase K Nutritive 8H Magic Night Serum 90ml
from £30.728 stores
1
from £30.72
8 stores
3
The Ordinary Multi-Peptide Serum for Hair Density 60ml
from £10.986 stores
1
from £10.98
6 stores
4
Kerastase Elixir Ultime Original Oil 30ml
from £16.997 stores
from £16.99
7 stores
5
L'Oréal Paris Elvital Growth Booster Hair Serum 102ml
from £8.076 stores
from £8.07
6 stores
Kerastase Genesis Anti-Breakage Fortifying Serum strengthens weakened strands directly from the root. The leave-in scalp formula works across all hair types to reduce hair fall caused by breakage. It absorbs smoothly without weighing down fine or curly textures.
Pros
Strengthens hair and prevents fall
Stimulates hair growth
Generous 90 ml bottle size
Vegan formula
Cons
Premium brand pricing
Requires consistent daily use
Kerastase K Nutritive 8H Magic Night Serum delivers deep hydration while you sleep to repair dry and distressed strands. It works overnight to detangle, smooth frizz, and impart a soft shine by morning. The lightweight texture absorbs easily without leaving residue on your pillow.
Pros
Overnight intensive hydration
Reduces frizz and adds shine
Repairs distressed strands
Large 90 ml size
Cons
Not formulated for hair growth
May feel rich on fine hair
The Ordinary Multi-Peptide Serum for Hair Density targets the scalp to foster thicker, fuller-looking hair. Its lightweight, water-based formula is silicone-free and gentle enough for sensitive scalps. It absorbs rapidly to support overall strand density and root volume.
Pros
Peptide blend for hair density
Suitable for sensitive scalps
Free of silicones and vegan
Boosts visible hair volume
Cons
Smaller 60 ml bottle
Focuses on scalp rather than lengths
Kerastase Elixir Ultime Original Oil provides versatile nourishing care enriched with argan for immediate softness and shine. It smooths unruly frizz while shielding strands against daily heat styling. The leave-in formula restores suppleness to dry, colored, or bleached hair.
Pros
Built-in heat shielding
Infused with nourishing argan
Delivers shine and frizz control
Compact and travel-friendly
Cons
Small 30 ml bottle size
Not targeted at hair growth
L'Oréal Paris Elvital Growth Booster Hair Serum promotes stronger strand growth while helping prevent unnecessary hair loss. The silicone-free scalp formula nourishes hair from the roots to boost resilience, shine, and moisture. It offers an accessible everyday solution for fine and distressed hair.
Pros
Generous 102 ml bottle
Silicone-free formulation
Stimulates growth and prevents loss
Imparts shine and softness
Cons
Not formulated for curly hair types
Requires regular application
Compare specifications
| Type | Hair serum, Scalp serum, Leave-in-serum | Hair serum, Overnight hair serum | Hair serum, Scalp serum | Hair oil, Leave-in-serum | Hair serum, Scalp serum |
|---|---|---|---|---|---|
| Hair type | Normal, Dry, Colour treated, Fine, Blond/highlighted, Distressed, Curly/permed, Frizzy | Dry, Colour treated, Distressed, Curly/permed, Frizzy | Colour treated, Fine, Distressed | Dry, Colour treated, Blond/highlighted, Distressed, Curly/permed, Frizzy | Normal, Colour treated, Fine, Distressed |
| Quantity | 90 ml/g | 90 ml/g | 60 ml/g | 30 ml/g | 102 ml/g |
| Features | Prevents hair loss, Strengthening, Stimulates hair growth | Shine, Moisturising/softening, Repairing, Nourishing, Anti-frizz | For sensitive scalp, Volume, Prevents hair loss, Strengthening, Stimulates hair growth | Shine, Moisturising/softening, Heat shielding, Strengthening, Repairing, Nourishing, Anti-frizz | Shine, Prevents hair loss, Moisturising/softening, Strengthening, Repairing, 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.
