La Shield

Sunscreen Gel SPF 40

Strong broad-spectrum UV protection.

Hybrid Chemical DominantGel
42
Needs ReviewOverall Rating
Based on formula analysis

Skin Type Match

20%

Drying · Sensitizing · Matte

Pros
  • Strong UV protection
  • No drying alcohols
  • Botanical allergen free
Cons
  • Contains synthetic fragrance
  • Zero hydrating humectants
  • Powdery matte finish
View other sunscreens for Sensitive Dry Skin

Performance Scores

SPF Level

Excellent

The input lists an SPF rating of 40 and active ingredients with robust UVB absorption profiles such as Octinoxate (peak 311 nm) and Iscotrizinol (peak 310 nm).

Broad Spectrum

Excellent

Bemotrizinol (peak 345 nm) and Diethylamino Hydroxybenzoyl Hexyl Benzoate (peak 354 nm) provide continuous, overlapping coverage across the UVA II and UVA I spectrums up to 400 nm.

Sweat Resistance

Poor

The presence of high-molecular-weight silicones like Dimethicone Crosspolymer and Divinyldimethicone/Dimethicone/Phenylsilsesquioxane Crosspolymer indicates an unverified, hydrophobic film-forming infrastructure.

Photo Stability

Excellent

Photobiology research confirms that Bemotrizinol is inherently photostable and acts as an effective broad-spectrum stabilizer for other photolabile filters within a formulation.

Visible Light

Poor

The ingredient list lacks any iron oxide color indices (e.g., CI 77491, CI 77492, CI 77499) and relies entirely on transparent or translucent powders like talc and silica.

Irritation Risk

Medium Risk

Synthetic fragrance mixtures are leading causes of allergic contact dermatitis in dermatological patch testing, while talc can physically irritate compromised skin.

Pore Clogging

Low Risk

Standard dermatological comedogenicity scales rate all present ingredients, including the primary emollients like cyclopentasiloxane and octyldodecanol, at 0 to 1 out of 5.

White Cast

Low Risk

Formulations using chemical filters as primary UV absorbers with secondary titanium dioxide demonstrate significantly reduced reflectance on Fitzpatrick I-IV skin.


Ingredients Analysis

Active Filters

Octinoxate ChemicalUVB

Studies indicate potential estrogenic and thyroid disrupting activity in animal models and human cell lines.

Bemotrizinol ChemicalBroad Spectrum UV

Identified in recent dermatological literature as a rare but emerging cause of allergic contact dermatitis.

Diethylamino Hydroxybenzoyl Hexyl Benzoate ChemicalUVA II / UVA I
Titanium Dioxide MineralUVB / UVA II

Classified as a possible human carcinogen if inhaled making spray and powder formulations a potential risk while dermal application remains safe

Iscotrizinol ChemicalUVB / UVA II

Key Inactive Ingredients

Cyclopentasiloxane SiliconeEmollient

The European Union is restricting this ingredient to a maximum concentration of one tenth of a percent in leave on cosmetics effective June 2027.

Dimethicone Crosspolymer Silicone ElastomerSensory Modifier
Octyldodecanol Synthetic OilEmollient
Divinyldimethicone/Dimethicone/Phenylsilsesquioxane Crosspolymer Silicone ElastomerSensory Modifier
Talc PowderSensory Modifier

Talc deposits often coexist with asbestos leading to a high risk of cross contamination with this known human carcinogen if not rigorously tested.

Undecylenoyl Phenylalanine Fatty AcidSkin Conditioning
Silica Mattifying AgentSensory Modifier
Colloidal Silica Mattifying AgentSensory Modifier
Fragrance SyntheticFragrance

Undisclosedfragranceblendsareamongthemostcommoncausesofcontactdermatitisandskinsensitizationincosmeticproducts[1.6].

Dimethicone SiliconeEmollient