Dr Sebagh Sun & City Protection SPF 50+ for oily acne-prone skin

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Questions and answers

What the research says

• Biomimetic hyaluronic acid-stabilized zinc oxide nanoparticles selectively inhibited C. acnes, outperformed erythromycin in preclinical acne models, and safely reduced acne lesions and redness in a clinical trial.

  Journal of Controlled Release, 2025

• Microfine titanium dioxide does not penetrate human skin when formulated in an oil-in-water emulsion with the pigment dispersed in the aqueous phase, compared to oily dispersions and liposomal encapsulation which allow deeper skin penetration.

  International Journal of Cosmetic Science, 2000

• A single application of 1.0 and 5.0% w/v Cucumis melo polysaccharide extract solutions showed significantly greater short-term skin hydrating efficacy than the benchmark in 20 volunteers.

  Natural Product Research, 2026

• The application of a sunscreen formulation containing ethylhexyl methoxycinnamate, ethylhexyl salicylate, methyl anthranilate, and octocrylene does not significantly affect critical acne-related species such as Cutibacterium acnes and Staphylococcus epidermidis, refuting the induction of facial dysbiosis in men.

  Archives of Dermatological Research, 2024

• Topical 0.5% hyaluronic-ZnO nanogel applied twice daily reduced inflammatory-lesion counts by 58% at week four in human subjects compared to baseline without causing erythema.

  Biomedicines, 2025

• Nels cream achieved a similar reduction in inflammatory and noninflammatory lesion counts compared to 5% benzoyl peroxide in acne vulgaris patients, but caused significantly fewer side-effects such as peeling and dryness.

  Clinical and Experimental Dermatology, 2000

• Topically applied coated and uncoated zinc oxide nanoparticles under flexing and massage are retained in the stratum corneum with no significant penetration into the viable epidermis and no cellular toxicity in human skin.

  Nanomedicine, 2016

• Replacing 20% of the chemical UV filter octyl methoxycinnamate with urucum oil in solid lipid nanoparticles maintained the skin protection factor without inducing toxic responses or significant skin penetration in human volunteers.

  Skin Pharmacology and Physiology, 2018

• Liposomal encapsulation of octyl methoxycinnamate increases its safety, skin affinity, and in vivo solar photoprotection factor while slowing its release and enhancing retention in the stratum corneum compared to a conventional formulation.

  International Journal of Nanomedicine, 2013

• Encapsulation of ethylhexyl methoxycinnamate and butyl methoxydibenzoylmethane in lipid microparticles significantly reduced their in vivo human skin penetration compared to nonencapsulated filters.

  Skin Pharmacology and Physiology, 2011

• Oral and dermal administration of Uvinul A plus resulted in three major urinary metabolites accounting for 52% of the oral dose, with a very low estimated daily systemic exposure of 8.1-9.3 μg/d in volunteers not intentionally exposed.

  International Journal of Hygiene and Environmental Health, 2020

• Replacing microsized titanium dioxide and zinc oxide with nanoparticles in sunscreens eliminates opaqueness and alters UV protection balance while inducing (photo)cyto- and genotoxicity and penetrating viable skin layers during long-term exposures.

  Nanotechnology, Science and Applications, 2011

• Microfine zinc oxide and titanium dioxide do not penetrate the stratum corneum of porcine skin in vitro, indicating that their use in sunscreens does not pose a health risk from internal exposure.

  Toxicology in Vitro, 2006

• Hyaluronic acid-grafted titanium dioxide nanoparticles increased SPF from 13.3 to 19.1 while demonstrating low photocatalytic activity, exceptional thermal stability with >95% SPF retention, enhanced moisturization with >80% hydration retention, and minimal cytotoxicity with 88.5% cell viability in HaCaT keratinocytes compared to unmodified nanoparticles.

  International Journal of Biological Macromolecules, 2025

• Treatment with lipid algae extract reduced the level of oxidized proteins in human keratinocytes and stratum corneum skin cells.

  Annals of the New York Academy of Sciences, 2004

• Topical astaxanthin-loaded algae extract hydrogel and lipogel formulations exhibited the highest antioxidant activity and successful in vitro release, suggesting their potential as anti-aging formulations.

  Journal of Cosmetic Dermatology, 2019

• Antarctic marine algae extracts increased cell viability, protected against inflammation, and enhanced the barrier integrity of human intestinal and keratinocyte cell lines damaged by lipopolysaccharide or ultraviolet radiation.

  Marine Drugs, 2022

Ingredients

Water, Zinc Oxide, Caprylic Capric Triglyceride, Ethylhexyl Methoxycinnamate, C12-15 Alkyl Benzoate, Diethylamino Hydroxybenzoyl Hexyl Benzoate, Octocrylene, Titanium Dioxide, Lauryl Peg-9 Polydimethylsiloxyethyl Dimethicone, Methyl Methacrylate Crosspolymer, Glycerin, Oleic Linoleic Linolenic Polyglycerides, Dimethicone, Sodium Chloride, Sea Water, Phenoxyethanol, Alumina, Phenyl Trimethicone, Tocopheryl Acetate, Pentylene Glycol, Butylene Glycol, Stearalkonium Hectorite, Isostearic Acid, Lecithin, Polyglyceryl-3 Polyricinoleate, Polyhydroxystearic Acid, Chlorphenesin, Sodium Citrate, Caprylyl Glycol, Stearic Acid, Propylene Carbonate, Hydroxypropyltrimonium Maltodextrin Crosspolymer, Bht, Hydroxyphenyl Propamidobenzoic Acid, Hydrolyzed Algae Extract, Melanin, Biosaccharide Gum-4, Cucumis Melo Fruit Extract, Ascorbyl Palmitate, Tocopherol, Ethylhexylglycerin

Behind this fit score

Lovi calculates every fit score from the full ingredient list with brand-independent rules our dermatologists and cosmetic chemists build and review, and personalizes every pick with AI trained on the real results of millions of users. Lovi trains its fit score models on a proprietary dataset built from more than 10,000 expert-labeled products and more than 100,000 simulated examples, following an internally consistent methodology presented at Cosmoprof, AMWC, and Skin of Color Update.