A 3-week vial routine for thinner-looking hair
Biocyte Keratine Forte Serum is a leave-on scalp serum for hair that looks thinner, dull or weak. It combines four actives, each with its own role. Anagain, a patented pea sprout extract, supports the look of fuller hair. Legactif, a second patented active, gives the scalp a revitalising feel. PQQ supports scalp vitality, and hydrolyzed keratin, the main building block of hair, strengthens the fibre.
How it works
Each 9ml vial has a soft applicator tip and holds three doses, so one vial covers three days. The liquid is applied directly to the scalp and left on, without rinsing. It is light and does not make hair greasy when used on a dry scalp after washing.
Who it suits
- Hair that looks thinner or changes with the seasons
- Thinner-looking areas
- Hair lacking strength and vitality
- Anyone wanting a short intensive routine or regular upkeep
Worth knowing before you buy: The serum contains fragrance and is not suitable if you are allergic to any of its ingredients. Once opened, a vial should be used within 7 days. For longer routines, the 15-vial pack is more economical.
How long a box lasts
One vial lasts three days, so the box of 5 covers about 15 days of intensive care. A full 3 to 6 week routine needs two to three boxes. For maintenance, one vial a week makes a box last five weeks.
Complete the routine

Keratine Forte 15 Vials
The same serum in a pack for a full routine.
Shop →
Keratine Forte Mask
A repairing keratin mask for weak lengths.
Shop →Characteristics
- Texture: liquid serum in vials
- Hair type: all hair types
- Hair concerns: thinner-looking hair, weak hair
- When to apply: daily on a dry scalp, preferably after washing
- Age: adults
- Main benefits: supports fuller-looking hair, strengthens hair, revitalises the scalp
- Formulated without: parabens
How to use
Break the vial at the white ring and fit the soft tip. Apply one dose to the dry scalp, preferably after shampooing, and massage in. Do not rinse. One vial gives three doses for three days. Intensive routine: daily for 3 to 6 weeks. Maintenance: one vial a week. Use within 7 days of opening.
Active ingredients
- Anagain (pea sprout extract): patented active that supports the look of fuller hair
- Legactif: patented active that gives the scalp a revitalising feel
- PQQ: supports scalp vitality
- Hydrolyzed keratin: strengthens the hair fibre
- Niacinamide: supports a healthy scalp
Ingredients
AQUA · PEG-40 HYDROGENATED CASTOR OIL · HYDROLYZED KERATIN · BENZYL ALCOHOL · GLYCERIN · RUSCUS ACULEATUS ROOT EXTRACT · DISODIUM PYRROLOQUINOLINEDIONE TRICARBOXYLATE · PERFUME (FRAGRANCE) · NIACINAMIDE · RUSCUS ACULEATUS ROOT EXTRACT · CITRUS LIMON PEEL EXTRACT · SOLIDAGO VIRGAUREA EXTRACT · SODIUM HYDROXIDE · PHENOXYETHANOL · CITRIC ACID · PISUM SATIVUM SPROUT EXTRACT · SODIUM BENZOATE · POTASSIUM SORBATE · BHT
Formulations are updated by the manufacturer from time to time. Always check the packaging you receive.
Manufacturer information
Brand: Biocyte SAS
Address: 32 rue Monceau, 75008 Paris, France
EAN: 3401562016107
