Beauty Kerastase Elixir Ultime vs Nutritive 8H Serum: Best Pick
Elixir Ultime and the Nutritive 8H Magic Night Serum are two of Kerastase's most loved oils, but they serve different needs. Elixir Ultime is the daily shine and frizz fighter. The 8H Night Serum is an overnight nourishment treatment for dry hair. Here is how they compare.
| Factor | Kerastase Elixir Ultime Hair Oil 2.5 oz | Kerastase Elixir Ultime Refill 2.5 oz |
|---|---|---|
| Main strength | Daily shine and frizz control | Overnight deep nourishment |
| Best hair type | All hair types | Dry, thirsty hair |
| Heat protection | Up to 450 degrees | Not a heat protectant |
| Use timing | Damp or dry, any time | Nightly, leave in overnight |
| Key oils | Wild camellia, argan, marula | Plant-based proteins, niacinamide |
| Price | Around 60 to 72 dollars | Around 58 to 66 dollars |
| Refill option | Yes, refillable bottle | No refill available |
Our Verdict
Choose Elixir Ultime if you want one daily oil for shine, frizz, and heat protection. It suits almost every hair type and the refillable bottle saves money. Choose the Nutritive 8H Night Serum if your hair is dry and you want intensive overnight care. Its protein-rich formula feeds thirsty hair while you sleep. Many people own both and use them at different times.
More Top Picks in This Category
Not sold on either of these two? Here are more bestselling options worth considering.
Best for: Travelers and first-time buyers wanting to test Elixir Ultime.
Kerastase Elixir Ultime Travel Size
- Travel-friendly size of the iconic Elixir Ultime
- TSA-compliant for carry-on bags
- Same shine-boosting oil blend
- Perfect for trying before the full size
Pros
- Great way to try the formula
- Travel-safe size
- Same premium performance
Cons
- Higher cost per ounce
- Runs out quickly with daily use
Best for: Dry or damaged hair with visible split ends needing targeted repair.
Kerastase Nutritive Split Ends Serum
- Targeted serum for split ends and breakage
- Seals and smooths damaged ends
- Lightweight, non-greasy texture
- Part of the Nutritive dry-hair line
Pros
- Visibly seals split ends
- Lightweight feel
- Great for dry, damaged hair
Cons
- Not a permanent split-end fix
- Premium price
Best for: Very dry hair that needs intensive overnight nourishment.
Kerastase Nutritive 8H Magic Night Serum
- Overnight nourishing serum for dry hair
- Works for 8 hours while you sleep
- Enriched with iris root extract and vitamins
- Non-greasy, pillow-safe formula
Pros
- Wake up to softer hair
- Non-greasy overnight formula
- Deeply nourishing
Cons
- Night-only use limits versatility
- Premium price
Want the Full Picture?
Penetrating vs Sealing Oils: Which Your Hair Needs
All hair oils are not doing the same job. Penetrating oils, like coconut and olive oil, have small enough molecules to enter the hair shaft, where they reduce protein loss during washing and genuinely strengthen from inside. Sealing oils, like jojoba and argan, mostly sit on the surface, smoothing the cuticle, adding shine, and locking in moisture that is already there. Using a sealer when you need penetration, or vice versa, is why oiling "does nothing" for some people.
Porosity decides the pick. Low-porosity hair has a tight cuticle that resists entry, so lightweight penetrating oils applied to damp hair work best. High-porosity or damaged hair drinks up everything and loses moisture fast, so it benefits from a penetrating oil first, then a sealing oil on top to lock it in. If your hair feels coated but still dry underneath, you have been sealing without penetrating. A versatile option like Kerastase Elixir Ultime Travel Size can serve as the sealing layer in that two-step method. For routine order with stylers and serums, Best Kerastase Hair Oils for Shine, Frizz Control, Repair breaks it down.
Pre-Wash Oiling vs Post-Wash Sealing: Two Different Jobs
Oiling before washing and oiling after washing are different treatments that get confused constantly. Pre-wash oiling, the traditional champi method, means saturating dry hair with oil thirty minutes to a few hours before shampooing. The oil fills the shaft so water cannot swell it as much during washing, which reduces the protein loss and breakage that wet hair is prone to. Penetrating oils like coconut do this job best.
Post-wash sealing is the opposite: a few drops on damp or dry hair after washing to smooth the cuticle, add shine, and slow moisture loss. Sealing oils like argan or jojoba shine here. Dry, coarse, or high-porosity hair often benefits from both, pre-wash protection plus post-wash sealing, while fine hair usually needs only the post-wash step on the ends. Matching the method to the oil is what makes Kerastase Elixir Ultime Travel Size perform: check whether your bottle is built to penetrate or to seal. For layering order with leave-ins and heat protectants, Kerastase Hair Oil Guide: How to Use It and Pick Your Match lays it out.
Oils for Fine Hair: Light Touch Rules
Fine hair and heavy oiling are a bad combination, but fine hair still needs the ends protected. The rules are simple and strict. Choose lightweight oils only, argan, jojoba, grapeseed, or camellia, and avoid coconut and castor, which are too heavy for fine strands. Apply to damp, not dry hair, so a little product spreads further, and keep it to the bottom third of the hair, never the roots.
The weighed-down next-day problem usually comes from applying too much or too high. If morning hair looks flat, you used twice what you needed; cut the dose in half before blaming the oil. Pre-wash oiling is generally too much for fine hair, one thorough post-wash application on the ends does the job. A light formula like Kerastase Elixir Ultime Travel Size used at two to three drops on damp ends gives fine hair the protection without the grease. For the full fine-hair routine, Kerastase Chronologiste Compared: Serum vs Regenerant Mask covers the details.