The Double Serum Thérapiste serves a dual purpose: it combines an oil-based treatment agent—which gently moisturizes the hair shaft—with a denser, cream-based “top-coat” texture to seal and condition the ends.
The Double Serum Thérapiste plays a dual role: it combines an oil-based treatment agent—which gently moisturizes the hair shaft—with a denser, cream-based “top-coat” texture to seal and condition the ends. It delivers a unique result thanks to a subtle combination of ultra-advanced formulas that are, however, diametrically opposed in terms of formulation.
Who is it for?
Damaged and over-processed hair (erosion levels 3–4), specifically for thick hair.
What are the effects?
Protects against heat up to 230°C. The hair fiber is instantly repaired and strengthened. The hair is protected from heat, and drying is twice as fast. Split ends are smoothed out.

Gently squeeze the product twice and work it into your palm until the textures blend together. Emulsify it with your fingertips, then apply it to the lengths and ends of towel-dried hair. Then blow-dry your hair.
It can also be used as a finishing touch on dry hair.
No rinsing required.
How does it work?
FIBRA-KAP™: compensates for missing KAPs and reactivates their synthesis.
SP94 provides the follicle with the energy needed to activate KAP synthesis.
6 amino acids known for their ability to bind to damaged areas of the hair.
1 wheat protein derivative that aids in recovery
Resurrection Sap: known for its regenerative power.
Contact the brand :
L’ORÉAL - 14, rue Royale - 75008 Paris France
relationclient@kerastase.oaccare.fr