Olay Vitamin C Brightening Facial Moisturizer with Sunscreen SPF 30

DESCRIPTION

What It Does: Provides stable vitamin c activity combining formulation stability with good skin delivery.

Why It's Used: Best balance of stability and bioavailability among vitamin c derivatives — 3-o-ea provides stability superior to ascorbic acid with better bioavailability than large ester forms like ascorbyl tetraisopalmitate.

How It Works: C3 ether position protection prevents oxidation at the most vulnerable c2-c3 enediol. more lipophilic than ascorbic acid for improved skin penetration. ether bond resistant to hydrolysis in formulation but cleaved by skin esterases for active ascorbic acid release in viable epidermis.

Typically Found In: Stable brightening serums,anti-aging vitamin c products

TECHNICAL DETAILS

Primary Category: Active ingredient – ethyl ascorbic acid

Secondary Functions: Tyrosinase inhibitor,collagen cofactor

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: 1%–3%

SOURCING & ETHICS

Vegan Status: Yes – synthetic

Halal Status: Yes

Source Notes: Synthetically produced vitamin c derivative.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 – very low

Comedogenicity Rating: 0/5 – non-comedogenic

Sensitivity Concerns: Non-irritating; suitable for all skin types.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Excellent safety profile. ewg score: 1.

Works Well With: Tocopherol,ferulic acid,niacinamide,spf

Avoid Combining With: No significant incompatibilities

SCIENTIFIC NOTE

3-o-ethyl ascorbic acid's ether bond at c3 provides fundamentally different stability vs ester-bonded vitamin c derivatives (ascorbyl palmitate, ascorbyl tetraisopalmitate). ether bonds are far more resistant to chemical hydrolysis than ester bonds — 3-o-ea is more hydrolysis-stable than c6 ester derivatives while still providing bioactive release via ether cleavage in skin.

Last Verified: Cosing database,cir safety assessment

Primary Sources: 2026-03-12

DESCRIPTION

What It Does: Provides uva-i protection (340-400nm) critical for photoaging prevention — the only widely available chemical uva-i filter.

Why It's Used: The essential uva-i filter — avobenzone is the only commonly approved chemical filter providing protection in the photoaging-critical 340-400nm range essential for broad-spectrum sunscreen claims.

How It Works: Dibenzoylmethane chromophore absorbs uva-i (λmax 357nm, εmax ~36,000). photodegrades via photoisomerisation requiring photostabilisation (octocrylene, bemotrizinol) for durability.

Typically Found In: Broad-spectrum sunscreens,anti-aging spf products

TECHNICAL DETAILS

Primary Category: Active ingredient – chemical uva-i filter

Secondary Functions: Skin conditioning

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: Up to 5% (eu), 3% (us fda)

SOURCING & ETHICS

Vegan Status: Yes – synthetic

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: Eu max 5%. fda: 3%. ewg score: 2. requires photostabilisation. photoallergy risk in some individuals.

Works Well With: Standard skincare actives

Avoid Combining With: No known significant incompatibilities

SCIENTIFIC NOTE

Avobenzone's photodegradation discovery drove development of photostabilisation technology — the period from avobenzone's 1978 introduction to development of effective photostabilisers in the 1990s was marked by sunscreens with inadequate uva durability. bemotrizinol (tinosorb s) development provided the most elegant solution by providing a photostable molecule with equivalent uva coverage.

Last Verified: Cosing database,fda uv filter otc monograph,shaath sunscreen photostabilisation review

Primary Sources: 2026-03-12

DESCRIPTION

What It Does: Provides silicone-characteristic silky feel and skin protection with adjustable viscosity.

Why It's Used: The benchmark cosmetic silicone – sets the gold standard for silky application feel, spreadability, and skin protection in virtually all skin care categories.

How It Works: Polydimethylsiloxane chain flexibility provides extremely low surface tension and high spreadability. inert si-o backbone provides chemical stability and excellent skin tolerance. occlusive film formation reduces tewl. higher viscosity grades provide more intense conditioning.

Typically Found In: Moisturizers,foundations,primers,sunscreens – nearly universal

TECHNICAL DETAILS

Primary Category: Functional ingredient – polydimethylsiloxane

Secondary Functions: Barrier sealing,softening

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: 0.1%–30%

SOURCING & ETHICS

Vegan Status: Yes – synthetic

Halal Status: Yes

Source Notes: Plant-derived, synthetic or animal-derived. verify source.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 – very low

Comedogenicity Rating: 1/5 – low; formulation-dependent

Sensitivity Concerns: Non-irritating.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Excellent safety profile. ewg score: 1.

Works Well With: Humectants,ceramides,actives as carrier

Avoid Combining With: No significant incompatibilities

SCIENTIFIC NOTE

Dimethicone's exceptional silky feel arises from its very low intermolecular attractive forces (weak van der waals forces due to non-polar methyl groups) that allow silicone chains to slide freely over skin. the coefficient of kinetic friction for pdms against skin (~0.04) is among the lowest of any cosmetic material – explaining why even small amounts transform product feel.

Last Verified: Cosing database,cir safety assessment

Primary Sources: 2026-03-12

DESCRIPTION

What It Does: Glycerin pulls water from the environment and deeper skin layers into the outer skin layer (epidermis), boosting moisture levels and keeping skin soft, smooth, and plump.

Why It's Used: It is used in virtually every moisturizer, serum, and cleanser because it is highly effective at hydrating skin, is well-tolerated by all skin types, and enhances the texture and spreadability of formulations.

How It Works: As a humectant, glycerin forms hydrogen bonds with water molecules, trapping them in the skin. it also reinforces the skin barrier by integrating into lipid structures between skin cells.

Typically Found In: Moisturizers,serums,cleansers,toners,sheet masks,sunscreens,body lotions,shampoos,conditioners

TECHNICAL DETAILS

Primary Category: Humectant

Secondary Functions: Skin barrier support,emollient,solvent

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: 1%–30% (typical: 3–10%)

SOURCING & ETHICS

Vegan Status: Yes – plant-derived (coconut, soy, palm) or synthetic

Halal Status: Yes – when plant-derived or synthetic; verify source with supplier

Source Notes: Derived from plant oils via hydrolysis or saponification; synthetic versions also available. palm-derived glycerin carries sustainability concerns.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 – very low; non-irritating at all standard concentrations

Comedogenicity Rating: 0/5 – non-comedogenic

Sensitivity Concerns: Extremely rare allergic reactions; generally safe for all skin types including sensitive and baby skin

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Widely recognized as safe. ewg hazard score: 1. no significant concerns for irritation, sensitization, or toxicity at typical concentrations (up to 50%).

Works Well With: Hyaluronic acid,ceramides,niacinamide,panthenol,urea,peptides,retinol,ahas/bhas

Avoid Combining With: No known incompatibilities at standard concentrations

SCIENTIFIC NOTE

Glycerin is an endogenous skin component found naturally in the stratum corneum. aquaporin-3 channels in keratinocytes facilitate glycerin transport, making it integral to natural skin hydration pathways.

Last Verified: Cosing database,cir safety assessment,ewg skin deep,inci decoder

Primary Sources: 2026-03-12

DESCRIPTION

What It Does: Provides uvb filtration and co-solvent function enabling higher uv filter concentrations in high-spf formulas.

Why It's Used: Spf enabler — homosalate's co-solvent function dissolves other uv filters more completely, enabling higher concentrations and therefore higher achievable spf in fluid-texture formulations.

How It Works: Cyclohexyl salicylate absorbs uvb (λmax 306nm, εmax 4,290 — moderate). also acts as oily co-solvent dissolving avobenzone, octinoxate, and other uv filters. photostable cyclohexyl structure.

Typically Found In: High-spf combination sunscreens

TECHNICAL DETAILS

Primary Category: Active ingredient – cyclohexyl salicylate uvb filter

Secondary Functions: Skin conditioning

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: Up to 15% (eu), 10% (us fda)

SOURCING & ETHICS

Vegan Status: Yes – synthetic

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: Eu max 15% (sccs 2019 reduced limit). fda: 10%. potential endocrine activity at high concentrations. ewg score: 4.

Works Well With: Standard skincare actives

Avoid Combining With: No known significant incompatibilities

SCIENTIFIC NOTE

Homosalate's maximum concentration in eu was reduced from 10% to 15% in sccs opinion 2019 (counter-intuitively raised, not reduced) specifically to enable effective uv filter dissolution — demonstrating that homosalate's primary value is as a co-solvent enabling other uv filters to function, not solely as a uv filter itself.

Last Verified: Cosing database,fda uv filter otc monograph,sccs homosalate opinion

Primary Sources: 2026-03-12

DESCRIPTION

What It Does: Niacinamide strengthens the skin barrier, reduces visible pore size, regulates sebum production, fades dark spots, and improves skin texture and tone.

Why It's Used: It is used because it addresses multiple skin concerns at once without irritation, making it suitable for all skin types. it is stable in formulations and pairs well with most other actives.

How It Works: Niacinamide inhibits the transfer of melanosomes (pigment packets) to skin cells, reducing hyperpigmentation. it also stimulates ceramide synthesis to strengthen the skin barrier and reduces inflammation by modulating cytokine activity.

Typically Found In: Serums,moisturizers,toners,cleansers,eye creams,sunscreens,primers

TECHNICAL DETAILS

Primary Category: Active ingredient – vitamin

Secondary Functions: Barrier repair,brightening,anti-inflammatory

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: 2%–10% (typical: 5%; higher concentrations may cause flushing in some individuals)

SOURCING & ETHICS

Vegan Status: Yes – synthetically produced

Halal Status: Yes – synthetic origin

Source Notes: Commercially produced via synthesis from nicotinic acid or 3-cyanopyridine. no animal-derived sources used in cosmetic-grade niacinamide.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 – very low; concentrations above 10% may cause temporary flushing in sensitive individuals

Comedogenicity Rating: 0/5 – non-comedogenic

Sensitivity Concerns: At concentrations >10%, some users experience niacin flush (transient redness/tingling). generally very well-tolerated.

Safe for Sensitive Skin: Yes – one of the best-tolerated actives for sensitive skin

SAFETY & COMPATIBILITY

Safety Profile: Extensively studied and considered very safe. ewg hazard score: 1. no significant systemic toxicity concerns at topical concentrations.

Works Well With: Retinol,peptides,ahas/bhas,hyaluronic acid,ceramides,zinc,vitamin c,spf

Avoid Combining With: High concentrations of vitamin c (ascorbic acid) may theoretically convert to niacin – use at different times if using pure l-ascorbic acid above 15%

SCIENTIFIC NOTE

Niacinamide is a precursor to nad+ and nadp+, coenzymes vital to cellular energy metabolism. its benefits for dna repair and mitochondrial function make it a key ingredient in anti-aging strategies.

Last Verified: Cosing database,cir safety assessment,ewg skin deep,pubmed clinical studies

Primary Sources: 2026-03-12

DESCRIPTION

What It Does: Absorbs uva (320–400 nm) and/or uvb (290–320 nm) photons with a high molar extinction coefficient, dissipates absorbed energy as vibrational heat, and contributes to the formulation's spf and critical wavelength.

Why It's Used: Organic uv filters are selected for their high molar extinction coefficient (>10,000 l/mol/cm for most commercial filters), specific spectral coverage complementing other filters in the system, and photostability under prolonged uv exposure.

How It Works: Aromatic π→π* and n→π* electronic transitions absorb uv photons exciting the chromophore to a singlet excited state (s₁). ultra-fast internal conversion (10⁻¹²–10⁻¹¹ s) dissipates excitation energy as heat rather than photochemical reactions, returning the molecule to the ground state for continued absorption.

Typically Found In: Sunscreens,spf formulas

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 local sunscreen 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

Organic uv filter photostability varies significantly — avobenzone degrades rapidly alone but is stabilised by octocrylene (energy quenching) or triazine-class filters (direct stabilisation). filter combination selection must account for photostabilisation requirements of each component.

Last Verified: Cosing database,organic uv filter photostability combination review

Primary Sources: 2026-03-12

DESCRIPTION

What It Does: Provides uvb-uva-ii uv protection and essential avobenzone photostabilisation.

Why It's Used: The essential combination partner — octocrylene's dual uv filter + avobenzone photostabilisation function makes it virtually irreplaceable for durable broad-spectrum chemical sunscreens requiring uva-i coverage.

How It Works: Cyanocinnamate chromophore absorbs uvb-uva-ii (λmax 303nm). triplet energy transfer from excited avobenzone to octocrylene photostabilises avobenzone (>90% efficiency at 3:1 avobenzone:octocrylene ratio). hydrophobic character enhances water resistance.

Typically Found In: Broad-spectrum sunscreens,avobenzone-containing formulas

TECHNICAL DETAILS

Primary Category: Active ingredient – uv filter and photostabiliser

Secondary Functions: Skin conditioning

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: Up to 10% (eu), 10% (us fda)

SOURCING & ETHICS

Vegan Status: Yes – synthetic

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: Eu max 10%. fda: 10%. ewg score: 3. recent benzophenone impurity concerns from aged product hydrolysis under study.

Works Well With: Standard skincare actives

Avoid Combining With: No known significant incompatibilities

SCIENTIFIC NOTE

Octocrylene's triplet energy transfer photostabilisation of avobenzone operates via a dexter electron exchange mechanism: excited-state avobenzone (triplet) transfers excitation energy to octocrylene via orbital overlap, allowing avobenzone to return to its ground state uv-absorbing form without photodegradation. this energy transfer is only efficient at close molecular proximity — requiring intimate mixing of the two compounds in the formulation oil phase.

Last Verified: Cosing database,fda uv filter otc monograph,sccs octocrylene opinion

Primary Sources: 2026-03-12

DESCRIPTION

What It Does: Stimulates collagen types i, iii, and iv synthesis in fibroblasts, reducing wrinkles and firming skin.

Why It's Used: Clinically proven signal peptide and the original matrixyl with the strongest evidence base for wrinkle reduction via collagen stimulation. cornerstone of peptide anti-aging formulations.

How It Works: Palmitoyl moiety enables stratum corneum penetration. pal-kttks peptide sequence mimics collagen type i procollagen fragment activating tgf-beta receptor-mediated collagen synthesis in fibroblasts. also stimulates fibronectin and hyaluronan production.

Typically Found In: Anti-aging serums,anti-wrinkle creams,eye treatments,neck creams

TECHNICAL DETAILS

Primary Category: Active ingredient – matrikine signal peptide

Secondary Functions: Collagen type i stimulation,wrinkle reduction,skin firming

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: 1–1000 ppm (typically 3–200 ppm)

SOURCING & ETHICS

Vegan Status: Yes – synthetically produced

Halal Status: Yes

Source Notes: Synthesized by solid-phase peptide synthesis (spps) followed by palmitoylation. commercially supplied in aqueous solution (matrixyl by sederma).

SKIN COMPATIBILITY

Irritancy Rating: 1/5 – very low

Comedogenicity Rating: 0/5 – non-comedogenic

Sensitivity Concerns: Non-irritating; suitable for all skin types.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Exceptional safety profile. ewg score: 1.

Works Well With: Hyaluronic acid,ceramides,retinol,vitamin c,niacinamide

Avoid Combining With: Avoid mixing with high-concentration ahas at same ph (may hydrolyze peptide bonds)

SCIENTIFIC NOTE

Lintner & mas-chamberlin (2002) demonstrated pal-kttks upregulates collagen i, iii, and iv as well as fibronectin in fibroblast cultures. a 2.0 ppm clinical trial showed statistically significant wrinkle depth reduction after 4 weeks.

Last Verified: Cosing database,lintner & mas-chamberlin (2002) matrixyl study,gorouhi & maibach peptide review

Primary Sources: 2026-03-12