The World's Leading Skincare Glossary, brought to you by Lesielle

The 1st Customized Skincare System that Adapts to YOUR Changing Needs



What is PEG-40 Hydrogenated Castor Oil?

PEG-40 hydrogenated castor oil is a combination of polyethylene glycol and hydrogenated castor oil. Castor oil is naturally occurring oil extracted from castor beans from plant Ricinus communis. Castor oil is a colorless to pale yellow liquid with a distinct taste and odor. It is rich in triglycerides and fatty acids like oleic acid, ricinoleic acid, and linoleic acid. PEG-40 hydrogenated castor oil is used in many cosmetic products. A combination of both PEG-40 and castor oil makes it contain the benefits of both the molecules in a single molecule.

Use & Benefits:

PEG-40 hydrogenated castor oil is used as an emulsifier and emollient in cosmetic products. It also functions as a surfactant reducing surface tension between oil and water. It makes dirt particles with oil present on the skin to be easily rinsed off from the skin with water. It helps to protect skin from infections like acne since it helps maintain the oil-water balance on the skin. It forms a protective layer on the skin and reduces the loss of moisture from the skin. It enhances the water retention capacity of the skin and keeps it hydrated. As an emulsifier, it gives stability to the product. It inhibits separation of the components of the product from getting separated into its oil and water-based components. It gives a uniform textured and homogenous mixture of product ingredients. It is used in formulations of creams, lotions, soaps, shampoos, cleansers, and other hair care and personal care products.

How to create your own Personalized Skincare with Lesielle?

Icons of the lesielle custom skin care system

Step 1: Select a nourishing base compatible with your skin, and your desired moisturization level

Step 2: Complete your treatment with up to four active ingredients for consistent and occasional use.

Step 3: Insert your base and up to four actives ingredients into your Lesielle device to produce a fresh single dose of face cream on demand when you need it.

Complete your routine with a cleanser and other complimentary products and accessories.


Don't you know what Base and Actives your skin needs?

Take our personalized skincare quiz.

Notice: the information collected here is limited in terms of use and scope. See terms and conditions.

The skincare system for an ever evolving skin, using recognized active ingredients with scientifically proven efficacy to create treatment tailored to each day's State of Skin. 

  • All rights reserved 2023