Overview/Definition
Glycerin, also known as glycerol, is a colorless, odorless, and non-toxic liquid derived from plant oils or as a by-product of soap-making. It is a powerful humectant, meaning it attracts moisture from the air into the skin, keeping it hydrated, soft, and supple.
Widely used in skincare, glycerin helps strengthen the skin’s moisture barrier, preventing water loss and enhancing overall skin resilience. It is non-comedogenic and suitable for all skin types, including sensitive and acne-prone skin. Due to its soothing and hydrating effects, it is commonly found in moisturizers, serums, cleansers, and face masks.
Glycerin also improves product stability and enhances the absorption of other active ingredients. It is often sourced from plants like coconut, palm, and soy, making it a key ingredient in many vegan and eco-friendly skincare formulations.
Function in Skincare
Glycerin functions primarily as a humectant, attracting and retaining moisture in the skin. It also acts as a skin conditioner and enhances the texture and spreadability of skincare products.
Skin Type Suitability
Best For:
- Dry, dehydrated, or flaky skin
- Sensitive skin, as it helps soothe and repair the moisture barrier
- Aging skin, for improved hydration and plumping
Suitable For:
- All skin types, including oily and acne-prone skin, due to its non-comedogenic nature.
Benefits of Glycerin in Skincare
- Deep Hydration: Draws moisture into the skin, keeping it soft and supple.
- Strengthens Skin Barrier: Helps repair and maintain the skin’s natural protective barrier.
- Smooths Skin Texture: Improves the appearance of fine lines and rough patches by boosting hydration.
- Enhances Product Performance: Improves spreadability and absorption of skincare formulations.
- Calms Irritated Skin: Reduces redness and sensitivity caused by dryness.
Potential Side Effects or Risks
- None
Usage in Skincare Products
- Moisturizers
- Serums
- Cleansers
- Toners
- Masks
- Sunscreens
How it's used
- Layered glycerin-rich products under occlusive ingredients (e.g., oils or creams) to lock in moisture.
- Used daily as part of a routine to maintain hydration and skin health.
- Paired with complementary hydrating ingredients like hyaluronic acid or ceramides for enhanced effects.
Scientific Studies/Research
Research highlights glycerin's ability to maintain skin hydration, enhance barrier function, and improve skin elasticity. Studies have shown it to be effective at concentrations as low as 3% and highly safe for prolonged use. Its humectant properties have made it a gold standard in both cosmetic and dermatological applications.
Other Names/Synonyms
- Glycerol
- 1,2,3-Propanetriol
Sustainability/Environmental Impact
Glycerin is often sourced from renewable plant-based materials, such as coconut or palm oil. Sustainable production methods are widely adopted, though it’s important to verify certifications (e.g., RSPO for sustainable palm oil). It is biodegradable and environmentally friendly in typical usage concentrations.
Fun Facts
- Glycerin was first discovered in 1779 as a by-product of soap-making.
- It’s not only a skincare staple but also used in food, pharmaceuticals, and even antifreeze.
- It is so hydrating that glycerin can pull water from up to 1,000 times its weight in moisture.
Sources/References
