Researched by Helena DeMaria-Williams
Formula IngredientSolvent, Penetration EnhancerDimethyl Isosorbide
INCI: Dimethyl Isosorbide
Dimethyl Isosorbide (DMI) is a bicyclic ether derived from isosorbide, itself a renewable sugar-based (sorbitol/glucose) compound. In cosmetic formulations it functions primarily as a high-purity solvent and skin penetration enhancer, capable of dissolving a wide range of active ingredients and helping them to penetrate more deeply into the skin. Because it can carry actives through the stratum corneum, it is particularly valued in formulations targeting anti-acne, skin-brightening, and self-tanning results.
Category
Solvent, Penetration Enhancer
Irritation Risk
Low
Skin Types
all skin types, oily, acne-prone, hyperpigmentation, dull skin
What does this do in a formula?
enhanced delivery of active ingredients, improved efficacy of actives, solvent for difficult-to-dissolve compounds, fast-absorbing carrier
Is Dimethyl Isosorbide safe? Key considerations
Can Dimethyl Isosorbide cause irritation?
Low RiskDimethyl isosorbide is generally considered a low-irritation ingredient at typical cosmetic use concentrations (up to ~10%). Because it is a penetration enhancer, it can increase the absorption and therefore the potential irritancy of other active ingredients it is combined with — formulators should take care when pairing it with known irritants such as high-concentration AHAs, retinoids, or vitamin C derivatives. No EU CosIng Annex II or III restrictions apply to this ingredient.
Does Dimethyl Isosorbide increase sun sensitivity?
No RiskDimethyl isosorbide does not itself increase photosensitivity. However, if paired with photosensitising actives (e.g. AHAs or retinoids), its penetration-enhancing effect may amplify those ingredients' sun-sensitising properties. SPF recommendations should follow the actives being delivered, not the DMI itself.
Is Dimethyl Isosorbide safe during pregnancy?
CautionMANUAL REVIEW: No dedicated pregnancy safety data for dimethyl isosorbide was available from priority sources during this research. As a penetration enhancer, there is a theoretical concern that it could increase systemic absorption of co-formulated actives that carry pregnancy restrictions (e.g. retinoids, hydroquinone). As a precaution, products containing DMI alongside pregnancy-restricted actives should be avoided. General low-concentration DMI use (as a plain solvent without co-formulated restricted actives) is not specifically flagged as harmful, but data is limited.
How does Dimethyl Isosorbide work?
Dimethyl Isosorbide (DMI) is a bicyclic ether derived from isosorbide, itself a renewable sugar-based (sorbitol/glucose) compound. In cosmetic formulations it functions primarily as a high-purity solvent and skin penetration enhancer, capable of dissolving a wide range of active ingredients and helping them to penetrate more deeply into the skin. Because it can carry actives through the stratum corneum, it is particularly valued in formulations targeting anti-acne, skin-brightening, and self-tanning results.
Individuals with sensitivity to paired actives (the DMI will enhance their penetration and any associated reactions); avoid products combining DMI with pregnancy-restricted actives during pregnancy should review the considerations above before use.
Which products contain Dimethyl Isosorbide?
Shop products that contain Dimethyl Isosorbide
Multi-Peptide + Copper Peptides 1% Serum
Niacinamide 10% + Zinc 1%
Caffeine Solution 5% + EGCG Eye Serum
Argireline Solution 10%
Natural Moisturizing Factors + PhytoCeramides
Azelaic Acid Suspension 10%
Granactive Retinoid 2% Emulsion
Ascorbyl Glucoside Solution 12%
Marine Hyaluronics
Granactive Retinoid 5% in Squalane
Salicylic Acid 2% Masque
Amino Acids + B5
