EltaMD UV Clear Tinted Broad-Spectrum SPF 46

DESCRIPTION

What It Does: Prevents microbial contamination that would otherwise render water-containing cosmetics unsafe — inhibiting bacterial, fungal, and yeast growth through membrane disruption, enzyme inhibition, or metabolic interference at permitted regulatory concentrations.

Why It's Used: Preservatives are safety-critical — un-preserved water-containing cosmetics can develop dangerous microbial contamination (pseudomonas aeruginosa eye infections, s. aureus skin infections) within days. preservation is a regulatory requirement, not an optional enhancement.

How It Works: Mechanism varies by class: organic acids (benzoic, dehydroacetic) disrupt intracellular ph in bacteria and fungi by proton flux across membranes; parabens inhibit membrane-associated enzyme function; chlorhexidine disrupts bacterial and fungal membrane integrity through divalent ion chelation of membrane phospholipids.

Typically Found In: All aqueous formulations

TECHNICAL DETAILS

Primary Category: Active ingredient – cosmetic active

Secondary Functions: Skin conditioning

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: Check annex v eu limits

SOURCING & ETHICS

Vegan Status: Yes

Halal Status: Yes

Source Notes: Commercially produced for cosmetic use. verify vegan/halal status with supplier.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 – very low

Comedogenicity Rating: 0/5 – non-comedogenic

Sensitivity Concerns: Well-tolerated by most skin types.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Good safety profile at recommended concentrations. ewg score: 1–2.

Works Well With: Standard skincare actives

Avoid Combining With: No known significant incompatibilities

SCIENTIFIC NOTE

Eu regulation 1223/2009 annex v lists all permitted preservatives with maximum concentrations — preservatives not listed are prohibited. formulators must verify both permitted status and maximum concentration for each market before finalising preservation systems.

Last Verified: Eu regulation 1223/2009 annex v,cosmetic preservative regulatory review

Primary Sources: 2026-03-12

DESCRIPTION

What It Does: Provides stable vitamin e delivery with antioxidant activity after esterase hydrolysis in skin.

Why It's Used: The formulation-stable vitamin e — tocopheryl acetate's ester protection prevents oxidative degradation during shelf life while releasing active tocopherol in skin for equivalent biological activity.

How It Works: Acetate ester blocks the phenolic oh group responsible for oxidation and radical scavenging. skin esterases cleave acetate bond releasing free tocopherol. released tocopherol provides lipid peroxyl radical scavenging in cell membranes. also provides direct emollient and skin conditioning.

Typically Found In: Moisturisers,sunscreens,anti-aging products — extremely widespread

TECHNICAL DETAILS

Primary Category: Active ingredient – stable vitamin e ester

Secondary Functions: Free radical scavenging,anti-aging

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: 0.1%–5%

SOURCING & ETHICS

Vegan Status: Conditional – natural from vegetable oils (soy, sunflower); synthetic dl-form

Halal Status: Yes

Source Notes: Plant-derived extract or synthetic.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 – very low

Comedogenicity Rating: 0/5 – non-comedogenic

Sensitivity Concerns: Non-irritating; well-tolerated.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: The d-alpha-tocopheryl acetate (natural isomer) is biologically superior to dl-alpha-tocopheryl acetate (racemic synthetic) for skin antioxidant activity. ingredient label d- vs dl- prefix identifies natural vs synthetic origin.

Works Well With: Vitamin c,vitamin e,ferulic acid,spf,other antioxidants

Avoid Combining With: No significant incompatibilities

SCIENTIFIC NOTE

Tocopheryl acetate's conversion to active tocopherol in skin is quantitatively efficient: skin esterase activity is sufficient to cleave 60-80% of applied tocopheryl acetate within 24 hours of application. however, the conversion rate varies with skin condition (eczematous or barrier-compromised skin has reduced esterase activity), meaning tocopheryl acetate efficacy may be reduced precisely in the skin conditions that most need antioxidant support.

Last Verified: Cosing database,cir safety assessment

Primary Sources: 2026-03-12

DESCRIPTION

What It Does: Provides the universal solvent and vehicle for water-soluble actives and the continuous phase of all o/w emulsions.

Why It's Used: The most essential cosmetic ingredient — aqua (water) is listed first on virtually all water-containing cosmetic inci labels as the highest-concentration ingredient, serving as the foundation of the global cosmetics industry.

How It Works: Acts as solvent for all water-soluble ingredients (glycols, amino acids, water-soluble actives). forms the continuous external phase of o/w emulsions (lotions, creams, serums). provides aqueous environment for enzymatic and chemical reactions between actives. ph adjustment medium.

Typically Found In: Virtually all cosmetic products — the most universal cosmetic ingredient globally

TECHNICAL DETAILS

Primary Category: Functional ingredient – water

Secondary Functions: Skin conditioning

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: Varies widely — up to 95% in some toners and serums

SOURCING & ETHICS

Vegan Status: Yes – water (deionised/purified)

Halal Status: Yes

Source Notes: Cosmetic-grade water is purified (deionised, distilled, or ro filtered) to prevent mineral content interference with formulation stability. european pharmacopoeial water (aqua purificata ph. eur.) is the quality standard for pharmaceutical and high-end cosmetic formulations.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 – non-irritant

Comedogenicity Rating: 0/5 – non-comedogenic

Sensitivity Concerns: Well-tolerated by most skin types.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Good safety profile at recommended concentrations. ewg score: 1–2.

Works Well With: Standard skincare actives

Avoid Combining With: No known significant incompatibilities

SCIENTIFIC NOTE

Water's position as the first inci ingredient on most cosmetic labels reflects the regulatory requirement to list ingredients in descending concentration order — meaning water is the most abundant ingredient in the majority of cosmetic products. the fundamental role of water as the universal cosmetic solvent and vehicle makes it simultaneously the most important cosmetic ingredient and the one that requires the most sophisticated formulation chemistry to control — every emulsifier, thickener, preservative, and ph adjuster exists primarily to manage water's interaction with other ingredients in formulation.

Last Verified: Cosing database,eu cosmetics regulation 1223/2009 inci requirements,ph. eur. aqua purificata monograph

Primary Sources: 2026-03-12

DESCRIPTION

What It Does: Physically reflects and scatters uv radiation while providing antimicrobial, anti-inflammatory, and wound healing benefits.

Why It's Used: Multi-action mineral uv filter that simultaneously provides sun protection and skin-therapeutic benefits – the cornerstone of physical sunscreen formulations.

How It Works: Wide bandgap semiconductor physically reflects and scatters uv radiation (uva 320–400nm and uvb 280–320nm). dissolves to zn²⁺ providing antimicrobial activity, inhibiting bacterial and fungal growth. anti-inflammatory via inhibition of 5-lipoxygenase and il-8 production.

Typically Found In: Sunscreens,baby products,diaper creams,wound care,anti-acne formulations

TECHNICAL DETAILS

Primary Category: Active ingredient – mineral uv filter / antimicrobial

Secondary Functions: Broad-spectrum uv filter,anti-acne,diaper rash treatment

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: 1%–25% (spf products: 10–25%; eu max 25%)

SOURCING & ETHICS

Vegan Status: Yes – mineral/inorganic

Halal Status: Yes

Source Notes: Produced from zinc metal oxidation or chemical synthesis. nano zinc oxide (<100nm) improves aesthetics.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 – very low

Comedogenicity Rating: 0/5 – non-comedogenic

Sensitivity Concerns: Non-irritating; recommended for sensitive, baby, and rosacea-prone skin.

Safe for Sensitive Skin: Yes at recommended concentrations

SAFETY & COMPATIBILITY

Safety Profile: Excellent safety profile. fda category i generally recognized as safe and effective (grase) for sunscreen. eu cosmetics regulation: max 25%. ewg sunscreen score: 1.

Works Well With: Niacinamide,salicylic acid,other actives

Avoid Combining With: No significant incompatibilities at standard concentrations

SCIENTIFIC NOTE

Zinc oxide's broad-spectrum uv coverage extends into the uva1 region (360–400nm) more effectively than titanium dioxide, making it preferred for photoaging protection. nano zinc oxide (<100nm) achieves transparency on skin while maintaining uv protection efficiency.

Last Verified: Cosing database,fda sunscreen grase ruling,ewg sunscreen database,eu cosmetics regulation

Primary Sources: 2026-03-12