How to Use Kerastase Magic Night Serum

The Kérastase Nutritive 8H Magic Night Serum has achieved cult status in the luxury hair care world. Promising 8 hours of continuous nourishment while you sleep, it acts like a rich night cream but for your hair. However, because it is a leave-in treatment, applying it incorrectly can lead to greasy, weighed-down locks. Here is exactly how to use Kerastase Magic Night Serum for the best results.

The Nighttime Routine (Step-by-Step)

The beauty of this serum is its versatility; it can be used on both dry hair (between wash days) or towel-dried damp hair right after a shower.

Step 1: Dosage. Dispense 1 to 2 pumps of the serum into the palm of your hand. If you have very fine or short hair, use only 1 pump. If you have thick, coarse, or long hair, you may need 2 to 3 pumps.
Step 2: Warm it Up. Rub your hands together to distribute the serum evenly across your palms and fingers. This prevents applying a heavy blob to one single section of hair.
Step 3: Target the Ends. The golden rule of hair serums: never apply to the roots. Start applying the serum at the very ends of your hair (the oldest, driest part) and gently work your way up to the mid-lengths.
Step 4: Distribute. Use a wide-tooth comb or a boar bristle brush to gently brush your hair. This ensures the serum coats every single strand evenly without clumping.
Step 5: Sleep. Leave it in overnight. You do not need to rinse this out in the morning. The formula is designed to completely absorb into the hair fiber over 8 hours.

Why It Works

Unlike heavy hair oils that just coat the outside of the hair in a greasy slick, the Kérastase Magic Night Serum is formulated with Iris Root extract and a blend of 5 vitamins (including Vitamin E). These ingredients penetrate the cuticle, reversing daytime damage caused by UV rays, styling tools, and environmental friction while you sleep.

Summary

Knowing how to use Kerastase Magic Night Serum is simple: apply 1-2 pumps focusing strictly on the mid-lengths and ends, comb it through, and leave it in while you sleep. By morning, the serum will have fully absorbed, leaving you with detangled, deeply hydrated hair that is ready to style without any heavy residue.

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