The ultimate Kérastase lineup
Kérastase is expensive. Let me get that out of the way first. A bottle of shampoo costs the same as a decent dinner, and the brilliance drops cost as much as a haircut at a real salon. So when I tell you I keep buying these, I mean it. I have replaced these bottles enough times to know which ones earn the price tag and which ones don't.
5/8/20265 min read
The six products in this lineup are the ones I'd repurchase tomorrow without thinking. If you've been tempted by the Kérastase aisle and don't know where to start, this is your shortcut.
The scalp serum
I started using this scalp serum when my hair felt fine but my scalp felt off. Itchy in patches, oilier than usual, and I noticed more shedding than I was comfortable with. Two months of this serum and the shedding calmed down significantly.
You apply it to a dry or damp scalp before washing. It targets buildup and supports the roots, which is the silent killer of healthy hair if you live in a city with hard water. If your shampoo isn't working as well as it used to, your scalp probably isn't dirty. It's coated. This serum unsticks all of it.
I use it twice a week before my shower. It tingles a little, in a good way. After the first month my scalp felt lighter, and my hair held a blowout for an extra day.
The Nutritive Night Serum
You apply this night serum to dry hair before bed and sleep on it. I was skeptical because oils on hair before sleep sounds like a recipe for a greasy pillow. This one absorbs.
In the morning my hair is softer, less frizzy, and my ends look like I trimmed them. It's especially good for dry midlengths and ends, which is most of my hair past the halfway point. Great for travel too because the bottle is tiny and TSA friendly.
The trick is to apply it only to the bottom two thirds of your hair, never the roots. A few drops, raked through with your fingers, then sleep on a silk pillowcase if you have one. The combination is genuinely transformative.
The Gloss Absolu shampoo
The Gloss Absolu line is what changed my hair. The shampoo lathers gently, smells like a high end salon, and rinses clean without that squeaky tightness cheaper shampoos give you.
It's marketed for color treated and dull hair, but honestly anyone with hair that's lost its shine will see a difference. After one wash my hair already looked glossier. After three weeks I stopped booking gloss treatments at the salon, which more than paid for the bottle.
I lather twice on wash days. First pass to clear out product buildup, second pass to actually treat the hair. The second lather is where the magic happens.
The Gloss Absolu conditioner
I pair this with the shampoo because they're built to layer. The conditioner adds slip, deep hydration, and what I can only describe as bounce. My ends untangle without a fight, and my hair air dries with way less frizz than it used to.
I leave it in for three to five minutes during my shower and rinse with cool water. That cool rinse seals the cuticle and is the cheapest hair hack you'll ever read. No tool, no extra product, just a colder finish.
If I'm having a particularly dry week, I'll use this as a leave in mask once a week instead of conditioning normally.
The Gloss Absolu leave in spray
I spray this leave in spray on damp hair after the shower and once more before bed if my ends are looking dry. It's a heat protectant, a frizz fighter, and a shine booster in one bottle. I genuinely don't blow dry without it.
If you only buy one Kérastase product to test the brand, this is the one I'd send you toward. The payoff is visible from the first use, and a bottle lasts me four to five months because a little goes a long way. Roughly two to four sprays for medium length hair.
It's also the product that earns the most compliments. People ask me what I use, and I always tell them this one. Some have come back a month later to say their hair finally stopped frizzing.
The Gloss Absolu brilliance drops
The cult one. The one every hair influencer has had on their shelf since 2018. I resisted for years because I assumed the hype was hype. It's not.
Two pumps of these brilliance drops on damp hair before drying, one pump on dry hair to finish. They don't leave my hair greasy, they don't weigh down my fine sections, and the smell is genuinely unmatched. Subtle, expensive, slightly floral. I have been complimented on the way my hair smells more times than I have on my actual perfume.
The tiny size feels like a scam at first. It's not. A bottle lasts me close to six months because you only need a drop or two per use.
The honest verdict
I don't believe in pushing products people can't afford. If your budget is tight, the leave in spray and the brilliance drops are where I'd start. They give you the most visible result for the least money, and they work even with cheaper shampoo and conditioner from the drugstore.
If you have the budget for the full lineup, the difference after a month is the kind your hairdresser will mention. At my last appointment, my stylist asked what I'd been doing differently. I held up six fingers and listed them.
Good hair is mostly consistency, not luxury. But these particular six just happen to be both.
Shop the full Kérastase lineup in the links below.
