The Ordinary

LACTIC ACID 5% + HA

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Ingredient
Preservative,  Solvent, 

1, 2-Hexanediol

Good

A synthetic preservative and moisture-binding agent belonging to a class of agents known as higher molecular glycols. It is considered non-sensitizing.ξ

Emollient,  Plant Extract,  Preservative,  Moisturizer, 

Caprylyl Glycol

Good

Skin and hair conditioning agent that may be plant-derived or synthetic. Often used as part of a preservative blend in cosmetics.

Emollient,  Texture Enhancer, 

Cetyl Hydroxyethylcellulose

Good

A mixture of cetyl alcohol and hydroxyethylcellulose. It functions as thickener and stabilizing agent.

Preservative,  Moisturizer,  Miscellaneous, 

Ethylhexylglycerin

Good

A synthetic skin-softening agent also used as a preservative, a carrier, or suspending agent for other preservatives such as phenoxyethanol.

Skin-Replenishing,  Skin-Restoring,  Moisturizer,  Solvent, 

Glycerin

Best

Also called glycerol or glycerine, glycerin is a humectant thatŠ—Ès present in all natural lipids (fats), whether animal or vegetable. It can be derived from natural substances by hydrolysis of fats and by fermentation of sugars; it also can be synthetically manufactured, which is usually the case with modern-day skincare products.Glycerin is a skin-replenishing and restoring ingredient, meaning it is a substance found naturally in skin, helping to establish normal balance and hydration. ItŠ—Ès one of the many substances in skin that helps maintain a healthy look and feel, defending against dryness and working to maintain skinŠ—Ès moisture level. Essentially, glycerin is a master at hydration, and works best when combined with other replenishing and emollient ingredients.Some people wonder whether using products with glycerin takes too much water from skin when there isnŠ—Èt enough humidity in the air. This can occur with pure glycerin (100% concentrationŠ—”an amount thatŠ—Ès never used in skincare products). Any humectant (including glycerin) used in pure form can increase water loss by attracting water from the lower layers of skin into the surface layers when the climate is too arid (low humidity). For this reason, glycerin and humectants are typically used in concentrations of 5% or less and always combined with other ingredients to soften skin. In fact, glycerin combined with other emollients and/or oils is a fundamental cornerstone of most moisturizers.References for this information:International Journal of Cosmetic Science, August 2016, ePublicationBritish Journal of Dermatology, July 2008, pages 23-34Journal of Cosmetic Dermatology, June 2007, pages 75-82Proceedings of the National Academy of Sciences, June 2003, pages 7,360-7,365

Exfoliant,  Astringent,  Whitening, 

Lactic Acid

Best

Alpha hydroxy acid (AHA) extracted from milk, although most forms used in cosmetics are synthetic because that form is easier to formulate with and stabilize.

Texture Enhancer,  Moisturizer, 

Pentylene Glycol

Good

A synthetic skin-replenishing agent and solvent.

Film-Forming Agent,  Film-Forming/Holding Agent,  Skin-Replenishing,  Moisturizer, 

Sodium Hyaluronate Crosspolymer

Best

A modified form of skin-replenishing hyaluronic acid attached to a polymer structure that keeps it within skinŠ—Ès uppermost layers longer, allowing for enhanced hydration. Sodium hyaluronate crosspolymer is not animal-derived. References for this information:

Cleansing Agent,  Sensitizing,  Ph Adjusters, 

Sodium Hydroxide

Average

Also known as lye, sodium hydroxide is a highly alkaline ingredient used in small amounts in cosmetics to establish and hold the pH of a product.

Solvent,  Miscellaneous, 

Water

Good

Most widely used cosmetic ingredient; water is almost always listed first on an ingredient label because it is usually the ingredient with the highest concentration in the formula. Despite claims of skinŠ—Ès need for hydration and claims regarding special types of water, it turns out that water may not be an important ingredient for skin. Only a 10% concentration of water in the outer layer of skin is necessary for softness and pliability in this part of the epidermis. Studies that have compared the water content of dry skin with that of normal or oily skin do not find a statistically significant difference in moisture levels between them.

Emulsifier,  Surfactant,  Solvent, 

Isoceteth-20

Solvent, 

Maris Aqua

Viscosity Control,  Solvent, 

1,3-Propanediol

A Mild Lactic Acid Superficial Peeling Formulation

Allergic ingredients not found