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INCI: Potassium phosphate.

What is Potassium phosphate?

Potassium phosphate (K3O4P) is a salt of phosphate ions and potassium. Phosphorus occurs naturally in the human body and is required for many processes. It appears as white tetragonal crystals.

Use & Benefits:

Potassium phosphate functions as a buffering agent in cosmetic products. The pH of our skin is slightly on the acidic side i.e., 4.7 ~5 on average, also known as the acidic mantle. In our body is maintained naturally by the sebaceous glands, sweat glands, and natural flora of the skin. The acidic pH provides protection to the skin from external factors like microbes, irritants, etc. Passively it helps in reducing premature aging and irritation of the skin. It is important to maintain the normal pH balance of the skin in order to prevent detrimental effects on the skin. When a pH change to a lower range it becomes more acidic and can irritate the skin and when pH changes to higher numbers it becomes alkaline for the skin and may cause problems like itching and depletion of vital lipids from the skin. Potassium phosphate acts as a buffer to maintain this pH balance of the product and avoids skin’s pH to shift too far from the normal pH.  It is mainly used as a food additive, besides, to use in cosmetic products. It is used in formulations of shampoos, conditioners, bath products, and other skin and hair 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.


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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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