Sodium Hydroxide
Sodium Hydroxide is a buffering and denaturant ingredient. It’s in 2,058 products on Poliage, most often body lotion, moisturizer and body wash. Avoid lists on Poliage that include it: none.
Updated October 21, 2026
In plain English
Lye. Used in small amounts to adjust pH, or to turn fats into soap.
What it does
Contains Sodium Hydroxide: buffering
Function listed in CosIng
Contains Sodium Hydroxide: denaturant
Function listed in CosIng
Source: CosIng, the European Commission cosmetic ingredient database, ref 37890, accessed October 22, 2026. Also listed as natrii hydroxidum.
Products that contain Sodium Hydroxide
L’Oréal
Elseve energie shampooing purifiant
Lists fragrance, fragrance allergens, exfoliating acid, silicones, salicylic acid, coconut derivatives
L’Oréal
Elseve Fibralogy Shampooing créateur de matière (maxi format)
Lists fragrance, fragrance allergens, drying alcohol, exfoliating acid, sulfates, coconut derivatives
L’Oréal
Elseve Formule 2 en 1 Total Repair Shampooing reconstituant
Lists fragrance, fragrance allergens, exfoliating acid, sulfates, silicones, salicylic acid, coconut derivatives
L’Oréal
Elseve Huile Extraordinaire Shampooing crème nutrition
Lists fragrance, exfoliating acid, sulfates, silicones, salicylic acid, coconut derivatives
L’Oréal
Elseve Huile Extraordinaire Shampooing nutrition
Lists fragrance, exfoliating acid, sulfates, silicones, salicylic acid, coconut derivatives
L’Oréal
Elseve Liss Caresse [MK] Shampooing perfecteur
Lists fragrance, fragrance allergens, exfoliating acid, sulfates, silicones, salicylic acid, coconut derivatives
L’Oréal
Elseve Liss-Intense Shampooing disciplinant (Maxi format)
Lists fragrance, fragrance allergens, exfoliating acid, sulfates, silicones, salicylic acid, coconut derivatives
L’Oréal
Elseve Liss-Intense Shampooing disciplinant Huile d’Argan + Thermo-Protect
Lists fragrance, fragrance allergens, exfoliating acid, sulfates, silicones, salicylic acid, coconut derivatives
L’Oréal
Elseve Multi-Vitaminé Fresh Shampooing purifiant quotidien
Lists fragrance, fragrance allergens, exfoliating acid, sulfates, salicylic acid, coconut derivatives
L’Oréal
Elseve Multi-Vitaminé Shampooing vitalité
Lists fragrance, fragrance allergens, exfoliating acid, sulfates, parabens, silicones, salicylic acid, coconut derivatives
L’Oréal
Elseve Nutri-Gloss (+60% gratuit)
Lists fragrance, fragrance allergens, exfoliating acid, sulfates, silicones, salicylic acid, coconut derivatives
L’Oréal
Elseve Nutri-gloss Luminizer Shampooing haute brillance
Lists fragrance, fragrance allergens, exfoliating acid, sulfates, silicones, salicylic acid, coconut derivatives
L’Oréal
Elseve Re-Nutrition Shampooing soin
Lists fragrance, fragrance allergens, exfoliating acid, sulfates, silicones, salicylic acid, coconut derivatives
L’Oréal
Elseve Total Repair 5
Lists fragrance, fragrance allergens, exfoliating acid, sulfates, silicones, salicylic acid, coconut derivatives
L’Oréal
Elseve Total Repair 5 shampooing reconstituant (format XXL)
Lists fragrance, fragrance allergens, exfoliating acid, sulfates, silicones, salicylic acid, coconut derivatives
L’Oréal
Elvital Soin Defense Schützendes Sommer-Shampoo
Lists fragrance, fragrance allergens, exfoliating acid, sulfates, silicones, chemical UV filters, salicylic acid, coconut derivatives
L’Oréal
Elvive
Lists fragrance, fragrance allergens, exfoliating acid, sulfates, silicones, chemical UV filters, salicylic acid, coconut derivatives
L’Oréal
Elvive Anticaspa Selenium S Actif
Lists fragrance, fragrance allergens, sulfates, parabens, silicones, coconut derivatives
L’oreal
Elvive conditioner
Lists fragrance, fragrance allergens, drying alcohol, exfoliating acid, sulfates, silicones
L’Oréal
Elvive Energizzante Shampoo Delicato Citrus.Cr
Lists fragrance, fragrance allergens, exfoliating acid, sulfates, silicones, salicylic acid, coconut derivatives
L’Oréal
Elvive Hidra [Hialurónico]
Lists fragrance, fragrance allergens, exfoliating acid, sulfates, silicones, salicylic acid, coconut derivatives
L’Oréal
Elvive oleo extraordinario
Lists fragrance, fragrance allergens, sulfates, silicones, coconut derivatives
L’Oréal
Elvive oleo extraordinario shampoo
Lists fragrance, fragrance allergens, silicones
L’Oréal
Elvive Re-Nutrition Nourishing Shampoo
Lists fragrance, fragrance allergens, exfoliating acid, sulfates, silicones, salicylic acid, coconut derivatives
Related guides
How to read an ingredient list
What the ingredient list on a beauty product tells you, what the names mean, and what it leaves out, using FDA and EU labeling rules.
Does ingredient order show how much is in a product?
Ingredient lists run from most to least, but only down to 1%. Below that, any order is allowed. What the order shows and what it hides.
How do you patch test a new product?
What the AAD, FDA and DermNet say about testing a small area, the FDA hair dye skin test, in-office patch tests, and contact allergy basics.