Nº 4 Density Serum
Nº 4 Density Serum Flora Lab Paris
A hair serum that encourages growth, strengthens and thickens hair fibres, and boosts overall hair density. Acting deep within the hair follicle, it reactivates stem cells, reinforces hair structure, and supports a healthier scalp for optimal regrowth.
A hair serum that encourages growth, strengthens and thickens hair fibres, and boosts overall hair density. Acting deep within the hair follicle, it reactivates stem cells, reinforces hair structure, and supports a healthier scalp for optimal regrowth.
Free standard delivery on orders over £30
Goodie Bag gifted on orders over £120 with the code SPRING26
Personalized advice before, during and after your order
Samples added on request
For any beauty question (or other !) contact our customer service :
Live chat
Start a conversationHair type
All hair types
Concerns
Prevent Hair Loss
Flora Lab Paris
Nº 4 Density Serum
Availability in store
These informations are given as an indication, as stocks may vary. Please do not hesitate to contact our store.
£80
Notting Hill
243 Westbourne Grove W11 2SE London
- Monday 10am - 6pm
- Tuesday 10am - 6pm
- Wednesday 10am - 6pm
- Thursday 10am - 6pm
- Friday 10am - 6pm
- Saturday 10am - 6pm
- Sunday 11am - 6pm
Chelsea
194 King's Road SW3 5XP London
- Monday 10am - 7pm
- Tuesday 10am - 7pm
- Wednesday 10am - 7pm
- Thursday 10am - 7pm
- Friday 10am - 7pm
- Saturday 10am - 7pm
- Sunday 11am - 6pm
Marylebone
24 New Cavendish Street W1G 8TU London
- Monday 10am - 7pm
- Tuesday 10am - 7pm
- Wednesday 10am - 7pm
- Thursday 10am - 7pm
- Friday 10am - 7pm
- Saturday 10am - 7pm
- Sunday 12:00pm - 6pm
Clapham
42 Northcote Road SW11 1NZ London
- Monday 10am - 6pm
- Tuesday 10am - 6pm
- Wednesday 10am - 6pm
- Thursday 10am - 6pm
- Friday 10am - 6pm
- Saturday 10am - 6pm
- Sunday 11am - 6pm
Shoreditch
51 Redchurch Street E2 7DJ London
- Monday 10pm - 7pm
- Tuesday 10am - 7pm
- Wednesday 10am - 7pm
- Thursday 10am - 7pm
- Friday 10am - 7pm
- Saturday 10am - 7pm
- Sunday 12pm - 6pm
Islington
62 Cross Street N1 2BA London
- Monday 10am - 6pm
- Tuesday 10am - 6pm
- Wednesday 10am - 6pm
- Thursday 10am - 6pm
- Friday 10am - 6pm
- Saturday 10am - 6pm
- Sunday 11am - 6pm
Team insight
A real 'power serum' for the scalp that stimulates and boosts hair growth.
Application tips
After washing your hair, apply 12 to 16 drops to your scalp while it's still damp. Massage gently with circular movements. Do not rinse.
Results
The N°4 Density Serum is a lightweight, fluid hair serum with no added fragrance.
Formulated with Biomimetic Peptides, it helps reactivate stem cells and fibroblasts to promote hair growth and support collagen synthesis, improving follicle length. Its Biotin also helps increase hair density by regulating the anagen and telogen growth phases. Enriched with a blend of Cysteine, Adenosine, Niacinamide, and D-Panthenol, this serum additionally helps strengthen the hair fibre and regenerate damaged hair. Its FP5® Biome complex helps balance the scalp microbiome, while its FMP10® Complex contributes to a healthier and stronger scalp and hair.
The result? Fibroblasts that support the hair fibre are repaired, leaving hair visibly plumped and fuller.
Composition
Biomimetic Peptides
Stimulate growth
Biotin
Densifies hair
Cysteine, Adenosine, Niacinamide & D-Panthenol
Helps thicken hair fibres and restore damaged hair
Application tips
Results
Composition
After washing your hair, apply 12 to 16 drops to your scalp while it's still damp. Massage gently with circular movements. Do not rinse.
The N°4 Density Serum is a lightweight, fluid hair serum with no added fragrance.
Formulated with Biomimetic Peptides, it helps reactivate stem cells and fibroblasts to promote hair growth and support collagen synthesis, improving follicle length. Its Biotin also helps increase hair density by regulating the anagen and telogen growth phases. Enriched with a blend of Cysteine, Adenosine, Niacinamide, and D-Panthenol, this serum additionally helps strengthen the hair fibre and regenerate damaged hair. Its FP5® Biome complex helps balance the scalp microbiome, while its FMP10® Complex contributes to a healthier and stronger scalp and hair.
The result? Fibroblasts that support the hair fibre are repaired, leaving hair visibly plumped and fuller.
Biomimetic Peptides
Stimulate growth
Biotin
Densifies hair
Cysteine, Adenosine, Niacinamide & D-Panthenol
Helps thicken hair fibres and restore damaged hair
Complete list of ingredients
AQUA (WATER), GLYCERIN, NIACINAMIDE, ADENOSINE, BIOTIN, LACTOBACILLUS/CAPSICUM FRUTESCENS FRUIT FERMENT EXTRACT, CYSTINE, HYDROLYZED VEGETABLE PROTEIN, LARIX EUROPAEA WOOD EXTRACT, ZINC CHLORIDE, CHLORELLA VULGARIS EXTRACT, LAMINARIA DIGITATA EXTRACT, MARIS AQUA (SEA WATER), PANTHENOL, CAMELLIA SINENSIS LEAF EXTRACT, TRIFOLIUM PRATENSE (CLOVER) EXTRACT, DAUCUS CAROTA SATIVA (CARROT) ROOT EXTRACT, CITRIC ACID, LAVANDULA STOECHAS EXTRACT, LEUCONOSTOC/RADISH ROOT FERMENT FILTRATE, GLYCINE, SACCHARIDE ISOMERATE, XANTHAN GUM, SODIUM BENZOATE, SODIUM METABISULFITE, ACETYL TETRAPEPTIDE-3, ASCORBYL GLUCOSIDE, BUTYLENE GLYCOL, DEXTRAN
This list of ingredients is subject to change; please refer to the packaging of the purchased product.
Our customer's reviews