The Core Difference in One Sentence
Hair fall has two very different origins, and Kérastase built a line for each. Genesis addresses hair that falls because the fiber itself is weak — snapping as you brush, shedding from under-supported roots. Spécifique addresses hair that falls because the scalp beneath it is out of balance — oily, sensitive, or irritated. So the entire decision comes down to one diagnostic question: is your hair falling because it is weak, or because your scalp is unwell? Answer that, and your line chooses itself.
What Is Kérastase Genesis? (Hair Fall from Fiber to Root)
Genesis is built for hair fall that begins in the strand. Its philosophy is dual-action: it works on breakage at the fiber level — the hair that comes away in the brush or the blow-dry — and on shedding from weakened roots, addressing, in the brand's own framing, both kinds of hair fall at once. It is formulated for all women, all lifestyles, and every degree of hair fall, with shampoo variants for thin and for thick hair.
The actives are the line's signature: Edelweiss native cells and ginger root extract, supported by Aminexil, working to reinforce each strand from root to tip so it resists the everyday breakage that quietly thins a ponytail. The everyday hero is the Kérastase Genesis Anti Hair-Fall Fortifying Serum — a leave-on applied directly to the scalp each day to reduce breakage-related fall. For more established shedding, there is an intensive route, which we come to below.
The results land with real customers. As verified HairMNL buyer Marissa Elizalde wrote of the serum in January 2026, in two words: "Life changing." Genesis is also safe for colored and rebonded hair — though if a chemical service has left your scalp irritated, that irritation is a scalp problem, and scalp problems belong to Spécifique. Browse the full Kérastase Genesis collection.
What Is Kérastase Spécifique? (When the Problem Starts at the Scalp)
Spécifique is scalp-first. The range was created to address scalp-related issues — sensitivity, itchiness, dandruff, oily roots, and the hair loss that follows when a scalp is out of balance. Its logic is upstream of Genesis: where Genesis fortifies the fiber, Spécifique treats the condition causing the fall. Resolve the scalp, and the shedding it was driving eases with it.
This is where our climate matters. Manila's year-round heat and humidity push sebum production and scalp microflora into overdrive, and a naturally oilier scalp — common here — is exactly the terrain Spécifique was designed for. If your roots turn greasy within a day, your scalp itches or flakes, or a recent rebond or color service left your scalp sensitized and now you are shedding, the source is the scalp, not the strand.
The range is a complete system rather than a single product — and for hair fall specifically, it fields a dedicated trio. The Prévention Anti-Hairloss Shampoo is the daily preventive cleanse, formulated to gently wash while boosting body and lift. The Stimuliste Anti-Hairloss Spray is the daily leave-on — more on it below. And the Potentialiste Balancing Scalp Serum holds the terrain steady, restoring scalp equilibrium against pollution, sweat, and hard water. Around the trio sit the specialists: the Divalent anti-oiliness range for scalps that run greasy, and the Anti-Irritation Shampoo for dry, sensitive, itchy scalps. One caution against self-excluding: Spécifique is not "only for dandruff" — it covers the full spectrum of scalp health. Explore the Kérastase Spécifique collection to match your scalp concern.
The Head-to-Head — Stimuliste vs the Genesis Serum
Each line has a daily anti-hairfall leave-on, and choosing between them is the whole diagnostic in miniature. The Genesis serum works on the strand: Aminexil with ginger root and Edelweiss reinforces the fiber so hair stops snapping under brushing and styling. The Stimuliste spray (₱3,000) works on the scalp: a nutri-energising anti-hairloss spray that stimulates hair production while improving hair density and substance, and helps protect the follicle against premature aging.
The rule follows the diagnostic. Hair that breaks — mid-length snapping, fall that peaks at brushing and blow-drying — wants the Genesis serum. Thinning that starts at an unbalanced scalp — density quietly dropping while the roots run oily or stressed — wants Stimuliste, sprayed onto a scalp cleansed with the Prévention shampoo. Both are daily, no-rinse steps at a similar price, so the choice is never budget — it is which layer of the problem you are treating. And if you genuinely have both problems, the sequence below settles the order.
The Real Diagnostic — Which Problem Do You Actually Have?
Place yourself with a few honest observations.
Choose Genesis if: your hair snaps off at the mid-length or ends rather than only falling at the root; you lose the most hair while combing or blow-drying; and your scalp feels normal — not oily, not itchy, not flaking. The strand is the problem.
Choose Spécifique if: your scalp is oily, itchy, or flaky before the hair falls; your shedding comes alongside scalp irritation; or a recent rebond or keratin treatment left your scalp inflamed and the fall began after. The scalp is the source.
Use both if: your scalp is imbalanced and your fibers are already weakened. The sequence is the salon protocol — resolve the scalp first with the Spécifique shampoo and treatment, then add the Genesis serum to reinforce the fiber. If you're unsure where you sit, HairMNL's scalp quiz is the place to begin.
The overlap is more common than the neat two-way split suggests. A humid-climate oily scalp and stress- or post-treatment shedding often arrive together: the scalp tips out of balance, and fibers already weakened by color or rebond give way more easily under the strain. If both are true for you, reaching for both lines isn't indecision — it's treating the problem in the right order, scalp before strand. And give the sequence patience: a scalp in recovery frequently sheds a little more before it settles, so judge the result after a few honest weeks rather than a few washes. The early shed is usually the old, weak hair making way — not the treatment failing.
Building Your Routine — Step by Step
The Genesis routine, for fiber-driven fall: cleanse with the Genesis shampoo in your hair-thickness variant, follow with the fortifying conditioner or mask, and finish with the Anti Hair-Fall Fortifying Serum worked into the scalp. Use it daily and give it time — as long-term user Toni Salinas put it, "Use it continuously and you'll see a difference." Results tend to build from the second week of consistent use onward, not overnight.
The Spécifique routine, for scalp-driven fall: begin with the Prévention shampoo as the daily cleanse — or the Divalent bain if oiliness is your dominant concern, the Anti-Irritation Shampoo if sensitivity is — then treat daily with the Stimuliste spray on a clean scalp, keeping the Potentialiste serum in rotation to hold the balance. If your scalp is genuinely healthy, you don't need a scalp-active system — that's the cue to return to Genesis instead.
Keep the routine within the one brand for these targeted, scalp-active formulas; layering medicated products from different brands tends to muddy the result rather than improve it.
Maintenance or Intensive? Matching the Commitment to Your Concern
Most of what Genesis and Spécifique offer is everyday care — the serums, sprays, and shampoos that keep fall in check as part of a routine. For significant, established shedding, there is a step up: the Kérastase Genesis Cure Anti-Chute, a professional six-week ampoule program that works at the scalp's collagen matrix — dissolving the rigid hardening in the tissue to make it more elastic and supple, as the product describes. It is the intensive ampoule route for the family as a whole: whichever side of the diagnostic you sit on, when everyday maintenance isn't enough, the cure step is Genesis. Think of it not as a daily product but as an investment-grade intervention — the concentrated reset you commit to once.
Whichever level you choose, buy it from an authorized source. HairMNL sources Kérastase directly and guarantees authenticity — which matters in a market where counterfeits circulate through unauthorized sellers.
Two origins, two lines, one question. Decide whether your hair is falling because the strand is weak or because the scalp is unwell, match Genesis or Spécifique accordingly — or sequence both — and you are treating the cause, not chasing the symptom.
