Glycerin is a naturally derived humectant—a ingredient that draws moisture from the air into your skin. It's one of the most widely used and well-studied moisturizing agents in skincare, helping skin feel softer and more hydrated.
Benefits
Attracts and retains moisture in the skin
Improves skin hydration and softness
Helps strengthen skin barrier function
Suitable for most skin types, including sensitive skin
Science: The Cosmetic Ingredient Review Expert Panel concluded glycerin is safe as used in cosmetics across all concentrations. Research shows glycerin effectively improves skin hydration and is well-tolerated with minimal irritation risk. It is also referenced in clinical guidelines for managing inflammatory skin conditions and maintaining skin integrity.
Potassium sorbate is a preservative used in skincare products to prevent the growth of mold, yeast, and some bacteria, helping extend shelf life. It's a salt derived from sorbic acid and is commonly used as a gentler alternative to stronger chemical preservatives.
Benefits
Prevents microbial contamination and mold growth
Generally considered milder than some other preservatives like benzalkonium chloride
Allows products to remain effective longer without refrigeration
Potential concerns
May cause irritation or allergic contact dermatitis in sensitive individuals
Not suitable for preservative-free formulations
Limited effectiveness against some bacteria compared to stronger preservatives
Science: Clinical research suggests potassium sorbate is less damaging to delicate tissues than benzalkonium chloride, making it a preferred alternative preservative in sensitive applications like eye products. However, peer-reviewed safety data specific to topical skincare use in the general population is limited.
Propanediol is a lightweight humectant—a molecule that draws water into the skin to keep it hydrated. It's also used in cosmetic formulations as a solvent and preservative booster, helping products stay stable and feel smooth on the skin.
Benefits
Hydrates and moisturizes the skin
Improves product texture and spreadability
Helps preserve formulations naturally
Science: Propanediol can be produced through bio-based fermentation (from glycerol using microorganisms), making it an environmentally friendly alternative to traditional chemical synthesis. It is widely recognized as safe in cosmetic and food applications, with established use as both a humectant and preservative enhancer.
Ethoxydiglycol is a clear, colorless liquid used in skincare formulations as a humectant and penetration enhancer. It helps other active ingredients absorb more effectively into the skin while also drawing moisture into the skin's outer layers.
Benefits
Enhances absorption of active ingredients into skin
Humectant properties help skin retain moisture
Improves solubility of certain actives in formulations
Lightweight feel and quick absorption
Science: Research shows ethoxydiglycol significantly increases skin permeation of topical actives—one study found it boosted transdermal delivery by 6.3-fold compared to standard vehicles. It is recognized as a safe cosmetic ingredient with a long history of use, though peer-reviewed human safety data specific to this ingredient is limited.
Hyaluronic acid is a naturally occurring molecule found in your skin that acts like a sponge, holding water to keep skin hydrated and plump. In skincare products, it helps improve skin moisture, reduce the appearance of fine lines, and support overall skin texture and firmness.
Benefits
Boosts skin hydration and moisture retention
Helps reduce the appearance of fine lines and wrinkles
Supports skin firmness and elasticity
Well-tolerated and safe for most skin types
May enhance effects of other anti-aging treatments
Science: Multiple clinical studies confirm hyaluronic acid is highly effective and well-tolerated for improving skin hydration and signs of aging. Research shows it works as an effective standalone treatment and also enhances results when combined with other anti-aging procedures, with benefits sustained over extended use periods.
