Get a Free 5ml Mini Now Free 5ml Mini With Every Order of The Mantle
Moumoujus

GLYCERIN.

Essential CAS 56-81-5 / DENATURANT, HAIR CONDITIONING, HUMECTANT, ORAL CARE, PERFUMING, SKIN CONDITIONING, SKIN PROTECTING, SOLVENT, VISCOSITY CONTROLLING

Glycerin, a ubiquitous and highly effective humectant, is a cornerstone ingredient in precision skincare, recognized for its exceptional ability to draw and retain moisture in the skin. It significantly contributes to maintaining skin hydration, supporting barrier integrity, and promoting overall dermal health.

Summary

Humectant Moisturizer Skin-identical ingredient Skin protectant Barrier-restoring

Science

Mechanism of Action

As a potent humectant, Glycerin actively attracts and binds water molecules from both the surrounding environment and deeper skin layers to the stratum corneum, thereby enhancing the skin's natural moisture retention. It plays a critical role in supporting the restoration of the lipid barrier, which is essential for maintaining the structural integrity of skin lipids. Beyond hydration, Glycerin regulates keratinocyte maturation, mitigates inflammation and irritation, and boosts the function of aquaporins, specialized channels that facilitate moisture distribution to the outer skin layers. Its comprehensive action aids in repairing damaged skin, visibly plumping the complexion to smooth fine lines, and accelerating wound healing processes. Additionally, it enhances the dermal penetration of other active ingredients and inhibits the lipid phase transition of the stratum corneum, effectively preventing dryness.

Research

Clinical Evidence

High confidence
Effective range 3–45%
Optimal

10%

Key findings

  1. 01 Demonstrated superior skin hydration over three hours compared to 10% propylene glycol and 10% urea.
  2. 02 Proven effective for skin hydration, with increasing benefits observed at higher concentrations, particularly for dry skin types.
  3. 03 When combined with 1% hyaluronic acid and Centella asiatica stem cells extract, it induced sustained hydrating and moisturizing effects, improving skin barrier function for up to 24 hours.
  4. 04 Identified as the 'sweet spot' for optimal hydration, offering noticeable benefits without leading to undesirable stickiness.
  5. 05 Provides enhanced benefits for very dry skin, supporting intensive moisture retention.
  6. 06 Recognized by the FDA as an effective over-the-counter skin protectant.

Transparency

Dusting Analysis

Not commonly dusted
Min. effective
3%
Red flag below
3%

Glycerin's efficacy is directly proportional to its concentration, with measurable hydration benefits commencing from 3%. Given its fundamental role in skin hydration and barrier support, Moumoujus utilizes Glycerin at functionally effective percentages. Therefore, incidental 'dusting' is highly improbable in formulations targeting precision outcomes, as concentrations below 3% would offer a significantly diminished impact for its primary benefits.

The Formula

Formulation

Solubility
Water
Optimal pH N/A
0 7 14

Stability

Research did not identify a specific optimal pH range for Glycerin's stability. Its inherent high viscosity contributes to increased product viscosity and can enhance emulsion stability. In arid environments, co-formulation with occlusive agents is recommended to prevent moisture loss and maximize its humectant benefits.

Synergies

  • Hyaluronic Acid (e.g., 1%) and Centella asiatica stem cell extract for amplified, long-lasting hydration and improved barrier function.
  • Occlusives, particularly in dry climates, to prevent moisture evaporation and enhance efficacy.

Conflicts

  • Incompatible with facial oils, anhydrous products, and ointments due to its exclusive water solubility.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
78.5%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) affirms Glycerin's safety for use in cosmetic products at concentrations up to 78.5%. It is also recognized as Generally Recognized as Safe (GRAS) by the FDA for food and food packaging, and as an over-the-counter skin protectant between 20-45%. While generally well-tolerated, undiluted Glycerin can paradoxically dehydrate the skin and may cause blistering. Concentrations exceeding 30% can potentially lead to a drying sensation and irritate mucous membranes. Allergic contact dermatitis is exceedingly rare.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Verdict

Essential

Glycerin is an indispensable, highly versatile humectant crucial for deep, lasting skin hydration, barrier repair, and overall dermal health across all skin types, making it a foundational ingredient in effective skincare.

Related

Similar Ingredients

Finding similar ingredients…