Propylene Glycol

Propylene glycol is a synthetic organic compound that functions as a humectant, drawing moisture into the skin, and a solvent, helping to dissolve other ingredients. It also acts as a penetration enhancer, improving the delivery of active ingredients. It is a versatile ingredient found in many cosmetic and pharmaceutical products.

BenefitModerate 1.5 / 4

Hydration i2 / 4

Whether the ingredient helps increase the skin’s water content — humectants that attract water, ingredients that reduce water loss, or ones that make skin feel less dry.

RiskLow 1 / 4

Irritation i1 / 4

Risk of short-term irritation — stinging, burning, dryness, redness, or discomfort. Common for strong actives, acids, retinoids, fragrances, and harsh surfactants.

Sensitization i0.5 / 4

Risk of allergic contact dermatitis or immune-based reactions. Fragrance allergens, preservatives, botanicals, and some dyes may score here.

Rated by SpottyLabs' ingredient methodology, independent of brands.

What it helps with

• Increases skin hydration
• Enhances ingredient absorption

Things to watch

• May cause irritation in high concentrations or very sensitive skin
• Can be sensitizing for some individuals

Products with Propylene Glycol

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Frequently asked questions

What does propylene glycol do for the skin?

Propylene glycol primarily acts as a humectant, meaning it attracts water to the skin, helping to keep it hydrated. It also helps other ingredients penetrate the skin more effectively.

Is propylene glycol safe to use in skincare?

Propylene glycol is considered safe for use in cosmetics at typical concentrations. While some individuals with very sensitive skin may experience irritation, it is generally well-tolerated.