Genesis Serum Fortifiant Hair Serum

Yes, Serum Fortifiant is safe for all hair types including color-treated, highlighted, balayaged, and chemically processed hair. The silicone-free formula won't interfere with color vibrancy while strengthening fragile, processed strands that are more prone to breakage.

Yes, while Serum Fortifiant is formulated to work optimally with the Genesis system, it can be incorporated into routines with other Kérastase collections. For maximum anti-breakage results, we recommend the complete Genesis routine. However, if you have multiple hair concerns (such as breakage plus dryness), you can use a Nutritive shampoo and conditioner followed by Serum Fortifiant for scalp strengthening.

Unlike traditional serums that coat the hair shaft, Serum Fortifiant is a targeted scalp treatment that strengthens hair from the root. It uses professional-grade active ingredients (Edelweiss Native Cells, Caffeine, Arginine) at concentrations typically found in salon treatments — not drugstore formulas. The precision pipette applicator delivers actives directly to the scalp.

Inspired by the energy flowing from modern colognes, Genesis fragrance is a bright, invigorating scent of bergamot & a hint of aromatic green, with grounding notes of vetiver and musk.

For best results to strengthen weakened hair, we recommend using Serum Fortifiant Hair Serum daily after using a shampoo and conditioner or hair mask. The lightweight, non-greasy formula absorbs quickly without buildup, making it perfect for everyday use. You can also apply to dry scalp between washes for continuous protection against breakage.

We recommend using Serum Fortifiant Hair Serum on damp, towel-dried scalp after cleansing and treating with a conditioner or hair mask. After applying the hair serum, proceed to blow dry or let hair air dry. Do not rinse. For added strengthening between washes, you can also apply to dry scalp.

No, Serum Fortifiant Hair Serum is a lightweight formula that will not leave a residue when hair dries. It works to strengthen hair at the scalp level while leaving a lightweight, non-greasy finish that won't flatten fine or thin hair.

While Genesis products address hair fall due to breakage (mechanical stress from brushing, heat styling, and chemical treatments), not genetic hair loss, the strengthening formula helps hair appear fuller and denser by reducing breakage and protecting existing strands. If you're noticing lower density in specific areas due to breakage, Serum Fortifiant can help reinforce those weakened zones. For genetic or medical hair loss concerns, we recommend consulting a dermatologist.

Hair loss (alopecia) refers to strands falling from the root due to genetic or medical factors, where the hair follicle stops producing new hair. Hair fall describes strands breaking mid-shaft or shedding due to external stressors — brushing, heat styling, chemical treatments, or lifestyle factors like stress and diet. Genesis targets hair fall from breakage, strengthening hair so it resists mechanical damage. The collection helps reduce hair fall by up to 97% when used as a complete system. If you're experiencing significant root-level hair loss, consult a dermatologist.

Serum Fortifiant Hair Serum should be applied directly to the scalp in order to strengthen hair from the root and prevent hair fall due to breakage from brushing. Use the precision pipette to apply to parts of the scalp where your hair needs the most strength — areas where you notice less density or experience the most breakage. After applying with the pipette, massage in to distribute across the scalp.