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

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


INCI: Aqua

What is Aqua or Water?

Water is probably, the most important ingredient in skin care, and it is mainly used as a solvent. Deionized or demineralized water is standard water with much less content in other substance like salts. There are several reasons why tap water or normal water are not ideal when making cosmetics and skin care preparations.

Type of water



Suitability for use in cosmetics

Tap water

Filtration and treatment at the primary basis

Very slightly impure, impurities like metal and other ions

not suitable as ions may interact with other ions and may create salts or soaps.

Distilled water

Water is boiled, vapors are condensed to get distilled water

Some impurities boiled at a temperature lower than boiling water temperature can still remain, for example, alcohol, carbon dioxide from the air can also get incorporated in water.

Not suitable as it may alter physical characteristics.

Deionized or demineralized water

Water purified by RO or NANO purification

Ions like calcium, magnesium, iron or copper are removed

Yes, suitable as no interacting ions present

Purified water

It can be either distilled or deionized

Ions and metal removed

Overly pure for a cosmetic product

Use & Benefits:

Water or Aqua is the primary solvent in most of the formulations. It not only dissolves but also distributes the water-soluble active ingredient uniformly in a product. It is naturally available in abundance. 


Personalized & Adaptive skincare system

Create your own custom skincare and  adapt it to your skin changes

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. 

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