Fundamental Filler Serum from Kérastase is a concentrated hair serum that provides intense and long-lasting hydration to the hair. Its lightweight and non-greasy formula penetrates deeply into the hair fiber, restoring elasticity, softness, and shine to the strands.Active Ingredients:Hyaluronic Acid: retains moisture in the hair, giving it elasticity and softness. Silicone Polymers: smooth the surface of the hair, reducing frizz and making it easier to comb. Ceramides: strengthen the hair fiber, preventing breakage and split ends.Texture and Hair Type:This serum has a light and fluid texture that is quickly absorbed by the hair without leaving oily residues. It is suitable for all hair types, especially for dry, damaged, and frizzy hair, in need of intensive hydration and frizz control.Target Audience:The Fundamental Filler Serum is ideal for those looking for a versatile and effective product to moisturize, soften, and protect the hair against damage caused by heat and pollution. It is suitable for daily use as part of a hair care routine.Complementary Products:To enhance the results, it is recommended to use the Fundamental Filler Serum together with the shampoo and conditioner from the same line. Additionally, it can be complemented with specific treatments for the scalp and thermal protectors against heat damage.