What is Glycerin?
Glycerin, also known as glycerol, is a naturally occurring compound that is a component of many lipids. In skincare, it is one of the most widely used and effective ingredients, valued for its powerful moisturizing properties. It is a colorless, odorless, and viscous liquid that can be sourced from plant or animal fats, or synthetically produced.
How Does Glycerin Work in Skincare?
Glycerin is classified as a humectant, a substance that attracts and retains moisture. Its mechanism of action is straightforward yet highly effective: it draws water from the environment and the deeper layers of the skin (the dermis) into the outermost layer (the stratum corneum) [1].
This process helps to significantly increase the water content of the skin, leading to improved hydration [2]. Furthermore, studies suggest that topical application of glycerin can help to normalize skin hydration and support the skin's natural barrier function, which is crucial for protecting the skin from external irritants and preventing transepidermal water loss (TEWL) [3].
Key Benefits of Glycerin for the Skin
Glycerin offers a multitude of benefits that make it a cornerstone ingredient in virtually all effective skincare formulations:
Intense and Lasting Hydration
As a potent humectant, glycerin provides immediate and long-lasting hydration. By binding water to the skin, it keeps the surface supple and smooth, reducing the appearance of dryness and flakiness. This is especially beneficial when paired with other hydrating ingredients, such as in our Hyaluronic Acid Hydrating Serum, where glycerin works synergistically to lock in the moisture drawn in by the hyaluronic acid.
Supports Skin Barrier Function
A healthy skin barrier is essential for skin health. Glycerin plays a vital role in maintaining the integrity of this barrier. By ensuring optimal hydration levels, it helps the skin to function as a robust defense against environmental stressors and irritants [3]. This protective action is a key reason why it is included in products designed to soothe and fortify the skin, like our Ceramide Barrier Moisturiser.
Protection and Soothing
Glycerin is known to protect against irritants and can accelerate the recovery of irritated skin [3]. Its soothing properties make it an excellent ingredient for sensitive or compromised skin. Even in cleansing steps, like with our Gentle Hydrating Cleanser, glycerin ensures that the skin is cleansed effectively without stripping away essential moisture, leaving the skin feeling comfortable and calm.
Who Should Use Glycerin?
Glycerin is a universally beneficial ingredient. It is non-comedogenic and suitable for all skin types, including:
- Dry and Dehydrated Skin: Its primary function is to hydrate, making it a must-have for those struggling with dryness.
- Sensitive Skin: Its barrier-supporting and soothing properties make it well-tolerated and beneficial for easily irritated skin.
- Oily and Acne-Prone Skin: As a non-comedogenic hydrator, it provides necessary moisture without clogging pores or contributing to oiliness.
- Mature Skin: By improving skin hydration, it helps to plump the skin and minimize the appearance of fine lines.
How to Use Glycerin in Your Routine
Glycerin is a versatile ingredient found in cleansers, toners, serums, and moisturisers. To maximize its benefits, ensure it is part of your daily routine:
1. Cleansing: Start with a gentle cleanser that contains glycerin, such as the Gentle Hydrating Cleanser, to ensure your skin remains hydrated even during the wash-off phase.
2. Treating/Hydrating: Apply a glycerin-rich serum, like the Hyaluronic Acid Hydrating Serum, to damp skin to maximize the humectant's ability to draw in water.
3. Moisturising: Finish with a moisturiser containing glycerin, such as the Ceramide Barrier Moisturiser, to seal in the hydration and reinforce the skin barrier.
References
- Fluhr, J. W., Darlenski, R., & Surber, C. (2008). Glycerol and the skin: holistic approach to its origin and functions. *British Journal of Dermatology*, 159(1), 23–34. [https://pubmed.ncbi.nlm.nih.gov/18510666/]
- Lodén, M., & Wessman, W. (2001). The influence of a cream containing 20% glycerin and its vehicle on skin barrier properties. *International Journal of Cosmetic Science*, 23(3), 115–119. [https://pubmed.ncbi.nlm.nih.gov/18498456/]
- Atrux-Tallau, N., et al. (2010). Effects of glycerol on human skin damaged by acute sodium lauryl sulphate irritation: a quantitative analysis. *Skin Research and Technology*, 16(1), 24–31. [https://pubmed.ncbi.nlm.nih.gov/20043170/]