Humectant

Propylene Glycol

One of the oldest and most proven moisturizers in cosmetics — propylene glycol moisturizes the skin, enhances the action of preservatives, and improves the penetration of active components. Despite controversies, it is recognized as safe in regulated concentrations.

moisturizerpenetratorpreservative boosterclassic

✓ Safe

Comedogenic Rating

0/5

Irritation Potential

0/5

What is it?

Propylene Glycol (1,2-propanediol) — synthetic glycol. One of the oldest cosmetic humectants (since the 1930s). Functions: moisturizer (hygroscopic), solvent (dissolves actives, fragrances), penetrator (increases the penetration of other components), preservative booster. In INCI: Propylene Glycol.

Multifunctional base component in creams, lotions, toners, and peels. Also popular as a solvent for AHA and BHA in peeling products.

Key Benefits

✦

Hydration and moisture retention

Highly hygroscopic — attracts water from the environment and retains it in the stratum corneum. Effective hydration even at low humidity.

◈

Enhancement of active penetration (penetration enhancer)

Temporarily disrupts the lipid packaging of the stratum corneum, allowing other actives to penetrate deeper — increases the effectiveness of AHA, BHA, and water-soluble vitamins.

✧

Antimicrobial and preservative booster

Has its own antimicrobial action and synergistically enhances the effectiveness of preservatives — allows for a reduction in their concentration in the formula.

Suitable for

for all skin typesfor normal and dry skin

Main Actions

✓ hydration✓ enhancement of active penetration✓ solvent✓ preservative booster

Controversies surrounding PG

Propylene Glycol — one of the most "discussed" ingredients. EWG rating 3/10. At concentrations >5%, it can irritate sensitive skin and cause contact dermatitis. In regulated concentrations (1-3% in creams) — safe and effective. Alternatives: propanediol (natural), butylene glycol.

CategoryHumectants

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