Kérastase makes more than one scalp serum, and they are not variations on a theme — each carries a different active to solve a different problem. Reach for the wrong one and you treat a concern you don't have. The whole Kérastase scalp serum collection is built around this principle: match the serum to your scalp's actual concern — breakage, thinning, dandruff, oiliness, or lengths you are trying to grow — and a small daily ritual does real work. Here is how to find yours.
Why Your Scalp Concern Changes Everything
A scalp serum is a leave-on treatment that delivers concentrated actives straight to the scalp skin and the root of the fiber — which means the active inside matters more than the format. One serum reinforces the strand against breakage; another works at the scalp for density; another clears dandruff overnight; another rebalances a scalp that runs oily; another strengthens the roots for a long grow-out. They are not interchangeable.
Our climate sharpens the point. Manila's year-round heat and humidity drive a sweat-and-oil cycle at the scalp that can intensify both shedding and greasiness, while air-conditioned interiors quietly dry the scalp from the other direction. The serum that suits you depends on which of those realities is yours. It's worth dwelling on that dual climate, because it explains why two people in the same city can need different serums: step outside and the heat pushes sebum and sweat to the surface, a recipe for an oily, reactive scalp; spend the day in air-conditioning and the same scalp can read tight and dry by evening. Many of us move through both micro-climates in a single day, which is why a serum is never a one-size purchase — it is a match to whichever pattern dominates your scalp's week. One practical upshot worth flagging early, too: a serum applied to a sweaty scalp can't absorb, so in our heat, timing matters almost as much as choice.
What follows is a five-concern guide — find your concern, find your serum. All of them are stocked at HairMNL, the authorized Kérastase retailer in the Philippines.
Concern #1 — Hair Fall from Breakage → Kérastase Genesis Anti-Hair Fall Fortifying Serum
If you're finding hair on the comb, the pillow, and the shower drain, and the strands feel weak and quick to snap, this is breakage-driven fall — and the Genesis Anti-Hair Fall Fortifying Serum is the first answer. (One distinction worth drawing: this is everyday breakage and shedding, not medical hair loss — the serum strengthens the fiber, it is not a regrowth treatment.)
It works at the fiber, using Aminexil with ginger root extract and Edelweiss native cells to reinforce the strand so it stops breaking under the ordinary stress of brushing and styling. It is silicone-free and suits all hair types — and it is especially relevant for rebonded or color-treated hair, where post-treatment breakage is the most common complaint we hear. Used daily, it is the single most-reached-for Kérastase serum on our site.
The proof is in the consistency. As verified buyer Toni Salinas wrote, "Use it continuously and you'll see a difference" — and Imelda Luna, in her four-star review, kept it just as plain: "Effective in controlling hairfall." Both point to the same truth: this is a daily habit that compounds, not a one-wash fix. Pair it with a Genesis shampoo for the full ritual, and browse the Kérastase Genesis collection for the matching cleanser.
Concern #2 — Thinning or Low Density → Kérastase Densifique Cure or Genesis Cure Anti-Chute
If the concern is fullness rather than fall — hair that feels sparser than it used to, a ponytail that has visibly thinned, often after pregnancy, illness, or simply with age — the answer is a structured course, not a single bottle.
The dedicated density programme is the Densifique Cure, a daily scalp ampoule built on Stemoxydine that leaves thinning hair looking denser and thicker over the course. It comes in two versions tuned by concern: the Densifique Cure Femme for women (42 ampoules of 6ml) and the Densifique Cure Homme for men (30 ampoules), matching the more diffuse thinning men tend to experience. If your thinning comes with active shedding, the Genesis Cure Anti-Chute is the other expert-grade course — a six-week ampoule program engineered for excessive shedding on thin, brittle strands.
The distinction is one of commitment: these are concentrated, investment-grade interventions for anyone ready to address density loss systematically over a defined course, not casual add-ons. One honest note — they address the appearance of density and temporary shedding, not new hair growth, and postpartum thinning in particular often resolves on its own as hormones settle. For the full range, see the Kérastase Densifique collection and our thinning hair treatments.
Concern #3 — Dandruff → Kérastase Symbiose Anti-Dandruff Night Serum
If your flaking comes with oiliness — larger flakes that cling to an oily scalp, often with itch — that is dandruff, and it is a different problem from a dry scalp. Dandruff calls for treatment actives, and the Symbiose Anti-Dandruff Night Serum is the dedicated serum for it: a leave-on that targets all types of dandruff and works overnight to help eliminate it at the source, for efficacy that lasts rather than a rinse-day reprieve.
The overnight format suits our climate well — applied to a dry scalp before bed, it gets the uninterrupted hours that a sweaty Manila day never allows. For the full ritual, pair it with the Symbiose purifying anti-dandruff shampoo from the Kérastase Symbiose collection. And one clarification that saves people from the wrong purchase: if your flaking is fine, powdery, and comes with tightness rather than oil, that is a dry scalp, not dandruff — look at Potentialiste below instead.
Concern #4 — Oily or Reactive Scalp → Kérastase Spécifique Potentialiste
If your scalp turns oily by the second day, or reacts — itching or flaking from greasiness rather than dryness — the Spécifique Potentialiste serum is built for it. In Metro Manila's heat and pollution, a reactive, quick-to-oil scalp is among the most common concerns we see, and Potentialiste works as a universal defense: powered by pre- and probiotic fractions with antioxidant Vitamin C, it restores scalp equilibrium and reduces the sensitization triggered by pollution, sun, hard water, and temperature swings. That universality cuts the other way too — a scalp that reads tight and dry rather than oily gets the same rebalancing benefit, which makes Potentialiste the everyday pick for scalp comfort in general.
Read it correctly, though — Potentialiste is a leave-on scalp serum, not a treatment shampoo. It works alongside your regular cleansing routine rather than replacing it: a few drops on a clean, dry scalp, distributed with the fingertips, left to absorb. It is also one of the more searched Kérastase scalp serums by name, which is a fair signal of how many scalps it quietly suits.
Concern #5 — Growing Long Hair Strong → Kérastase Résistance Extentioniste Sérum
Growing your hair long is its own scalp concern: length only survives if the root is healthy and the new fiber comes in strong. The Résistance Extentioniste Sérum is the serum for that project — an energizing leave-on that stimulates and protects the scalp for healthy long hair, so the lengths you are growing arrive stronger and stay.
It slots naturally into a grow-out routine alongside regular trims and a strengthening cleanse — find the matching shampoo and mask in the Kérastase Résistance collection. If your ends still snap faster than they grow, start with the breakage serum in Concern #1 first; length is won at the fiber before it is won at the scalp.
How to Apply a Kérastase Scalp Serum
The technique is the same across the range, with small adjustments by product:
- Start on towel-dried or dry hair. Serums absorb best without excess water diluting the actives — and in our heat, towel away any sweat first.
- Part to expose the scalp. Four to six sections for thick hair; fewer for fine.
- Apply to the scalp, not the lengths. Use the dropper or nozzle — four to six drops for short-to-medium hair, six to eight for long.
- Massage with fingertips for 30–60 seconds. Use the pads of your fingers, never your nails, to lift circulation and absorption.
- Do not rinse. Style as usual.
Frequency follows the product: daily for the Genesis serum; around three times a week for Potentialiste; nightly for the Symbiose Night Serum; applied with a gentle scalp massage for the Extentioniste Sérum; and on their set course for the ampoule programs — the Genesis Cure Anti-Chute and the Densifique Cure alike. Persistent scalp conditions are worth a professional's eye — but for everyday concerns, consistency is what makes any of these work.
Your scalp tells you which serum it needs — breakage, thinning, dandruff, oiliness, or a long grow-out to protect. Match the active to the concern, apply it the right way, and give it the few honest weeks it asks for. That is the whole art of it. Get the match right, and a serum stops being one more bottle on the shelf and becomes the step your routine was missing.
