Science
Mechanism of Action
Isosorbide derivatives exert distinct but complementary actions on the skin. Isosorbide Dicaprylate (IDC) acts as an oil-loving hydrator, synergistically upregulating Aquaporin 3 (AQP3) alongside glycerin to facilitate water and glycerin transport into skin cells. IDC further strengthens the epidermal barrier by increasing CD44 (a hyaluronic acid binding receptor) and ceramide synthase expression, leading to decreased transepidermal water loss (TEWL). Additionally, IDC demonstrates anti-inflammatory effects by modulating the skin microbiome. Dimethyl Isosorbide (DMI) functions as a high-purity solvent and penetration enhancer, improving the solubility and deeper absorption of challenging actives like retinoids, UV filters, antioxidants, and brightening agents. This enhanced delivery optimizes product performance and can allow for lower, potentially less irritating, concentrations of actives.
Research
Clinical Evidence
Medium confidence2%
Key findings
- 01 A clinical study demonstrated that a 2% Isosorbide Dicaprylate (IDC) lotion provided a three-fold advantage in skin hydration compared to a 2% glycerin lotion. When used in combination with 2% glycerin, 2% IDC led to a 133% improvement in severely dry skin and a 35% improvement in moderately dry skin.
Transparency
Dusting Analysis
No specific data indicates that Isosorbide or its derivatives are commonly underdosed for cosmetic claims.
The Formula
Formulation
Stability
Dimethyl Isosorbide (DMI) exhibits high chemical and thermal stability, remaining stable up to 80°C. It contributes to product shelf stability by preventing active ingredient degradation. For optimal protection of sensitive actives, it is generally advised to add DMI during the cool-down phase of formulation.
Synergies
- Glycerin (enhances Isosorbide Dicaprylate's hydrating effects)
- Retinoids (Dimethyl Isosorbide enhances penetration)
- UV filters (Dimethyl Isosorbide enhances penetration)
- Antioxidants (Dimethyl Isosorbide enhances penetration)
- Anti-aging actives (Dimethyl Isosorbide enhances penetration)
- Brightening actives (Dimethyl Isosorbide enhances penetration)
Conflicts
- High concentrations with ingredients known for irritation in sensitive skin (for Dimethyl Isosorbide)
Safety
Safety Profile
While the parent compound Isosorbide is known pharmaceutically, its cosmetic derivatives like Dimethyl Isosorbide (DMI) are considered generally safe for topical use. DMI demonstrates low irritation potential, good skin tolerance, and is classified as non-comedogenic. Though specific CIR or SCCS statuses for DMI are often listed as 'data unavailable' or 'not reviewed,' the European Chemicals Agency (ECHA) classifies the parent Isosorbide as 'Not Classified' for GHS hazards. DMI is typically recommended for use within a 1% to 10% concentration range.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Isosorbide, through its effective derivatives, is a valuable dual-action ingredient that significantly enhances skin hydration and barrier function while optimizing the delivery and performance of other key active ingredients.
Related
Similar Ingredients
Finding similar ingredients…