L'Oréal Professionnel does not sell one hero product. It sells about a dozen concern-specific systems, and the whole brand only makes sense once you know which system is yours. Start with the problem, not the bottle.
One rule before the list: Serie Expert results come from the system, not the shampoo. The published numbers — +86% smoothness, −95% breakage, eight weeks of colour radiance — come from using the cleanser and the treatment together. Buying only the shampoo is the most common way to be disappointed by a line that works.
1. Damage and breakage
L'Oréal splits damage into two repairs that work in different places, and picking the wrong one is the single most common mistake on this brand.
- Surface damage — dry, rough, dull, heat- and colour-worn. This is Absolut Repair: Gold Quinoa and Wheat Protein resurface the fibre from the first wash. Pair the Absolut Repair Shampoo with the Absolut Repair Mask, or the lighter Absolut Repair Golden Mask if your hair goes limp under a rich mask. The 10-in-1 Perfecting Oil is the leave-in.
- Structural damage — bleached, elastic when wet, snapping. This is Absolut Repair Molecular: a patented Peptide Bonder with five amino acids that repairs the macro-molecular structure, in a sulfate-free base. The line is built as four steps: the Molecular Pre-Treatment before shampooing, the Molecular Shampoo, the Rinse-Off Serum, and the Leave-In Mask, which doubles as a heat protectant. If you only add one thing to the shampoo, make it the Rinse-Off Serum.
- Fine hair that snaps. Neither of the above — go to Inforcer, which uses Biotin and Vitamin B6 to reinforce fragile hair without the weight of a repair mask. The Inforcer Mask is the matching treatment.
How to tell which: wet a strand and pull it gently. If it stretches a long way and does not spring back, the damage is structural — go Molecular. If it feels rough and dry but does not stretch, Absolut Repair is enough and costs less.
2. Colour-treated hair
Two generations of the same idea, both live on this page.
- Vitamino Color is the established line: Resveratrol, an antioxidant, protects against the oxidation that fades colour — up to eight weeks of radiance. Shampoo, Conditioner, Mask and the 10-in-1 Spray.
- Vitamino Color Spectrum is the newer, higher-shine tier, formulated to protect the full spectrum of shades and techniques. It adds two things Vitamino Color does not have: the Glass Shine Serum for a mirror finish, and a Purple Shampoo for blonde and highlighted colour going yellow.
Which one: if your complaint is fading, either works and Vitamino Color is the cheaper route. If your complaint is that the colour looks flat rather than faded, Spectrum plus the Glass Shine Serum is the upgrade you are actually buying.
3. Metal and hard water — the concern most people do not know they have
L'Oréal's research found that copper and other metal particles from tap water accumulate inside the hair fibre, then react during colouring and bleaching. That is why identical formulas behave differently on two clients, and why colour can shift or dull faster than it should.
Metal Detox is the range built to neutralise them. The Cleansing Cream Shampoo is sulfate-free and does the everyday work; the Mask and the High Protection Cream follow it. The Concentrated Oil carries the line's headline result — −95% breakage in a single use, with twice the shine. There is also a professional Pre-Treatment Spray for use before a colour service.
Buy it if: you are on well or hard water, your colour dulls faster than it should, or you are about to have a lightening service. Skip it if: you are on soft municipal water and do not colour.
4. Frizz and humidity
Liss Unlimited smooths with kukui nut oil and the Pro-Keratin complex, and it is built for hair that behaves indoors and rebels the moment it meets humid air. Shampoo plus Mask, and the Blow-Dry Oil with primrose oil if you finish with heat.
For styling rather than washing, Tecni.Art Liss Control is the smoothing gel-cream. And if smoothing is a daily job, the Steampod 4.0 straightens with continuous steam — L'Oréal measures 91% less damage and twice the smoothness against a conventional flat iron.
5. Curls and coils
Curl Expression is a system, and the first decision is which cleanser.
- Dry curls, no build-up → Moisturizing Cleansing Cream. A creamy lather that deposits moisture rather than stripping it.
- Product build-up, heavy roots, limp pattern → Anti-Residue Cleansing Jelly. This is the one clarifying wash in the whole Serie Expert range, and it clears build-up without leaving curls squeaky.
Then match the mask to your curl pattern: the Moisturizing Mask for waves and looser curls, the Rich Moisturizing Mask for coils and very curly hair. Finish with the Intensive Moisturizing Leave-In or the Curl Activator Jelly for definition, the 10-in-1 Cream-in-Mousse if you want one product instead of three, and the Curl Reviver Water Mist for day-two curls.
6. Scalp
Scalp Advanced treats the scalp as skin, with three different diagnoses and three different actives. Do not mix them up — an oily scalp and a sensitive scalp need opposite things.
- Oily → Anti-Oiliness Dermo-Purifier Shampoo, with AHA to rebalance sebum at the root. Add the Anti-Oiliness Clay Masque weekly if roots are the only problem and your lengths are fine.
- Sensitive, itchy, tight → Anti-Discomfort Dermo-Regulator Shampoo, with niacinamide, and the Intense Soother leave-on treatment for the days after a colour service.
- Flaking → Anti-Dandruff Dermo-Clarifier Shampoo, with piroctone olamine.
7. Thinning and lost density
Serioxyl Advanced is the density range, and it is the one L'Oréal line where the serum is the product and the shampoo is the support act. The Denser Hair Serum uses Stemoxydine 5% and is measured at 1,700 new visible hairs over three months of daily use. The Thickening Shampoo plumps each fibre and preps the scalp for it.
Because the result is a three-month result, the 3-Month Program Set exists — three 90 ml serums, which is exactly the course. Buy the course, not one bottle, if you are going to do this properly.
8. Blonde, grey and brass
Three products, three different jobs, and they are not interchangeable.
- Lightened blonde that is dry and dull → Blondifier Gloss Shampoo. Acai polyphenols restore luminosity. This is a care line, not a toner. Add the Blondifier Mask or the Rinse Treatment for gloss.
- Grey, white or platinum drifting yellow → Silver Shampoo. Violet pigments plus gypsophila extract; the strongest toner of the three, and one to two washes a week is the right rhythm.
- Blonde or highlighted colour going yellow → Vitamino Color Spectrum Purple Shampoo, which tones and protects colour in the same wash.
One physics note that saves money: purple cancels yellow, blue cancels orange. If your brassiness is orange — which is what lightened brown hair goes — no purple shampoo in this range will fix it, and you need a blue toner instead.
9. Long hair with thin, worn ends
A concern in its own right, and Pro Longer is the only line here that addresses it. Filler-A100 and amino acids renew the lengths so ends look thicker rather than wispy. The Rinse Treatment gives a lamination effect in one in-shower step, and the Ends Filler Concentrate puts the line's highest dose of Filler-A100 straight onto towel-dried ends.
Still not sure?
If you have several of these at once — and most people do — treat them in this order: scalp first, then structural damage, then colour, then finish. A scalp problem undermines everything above it, and a repair product on a hair fibre that is still full of hard-water metal is money spent twice.
Read next: our guide by hair type, the line-by-line comparison, and the sizes, litres and refills guide.