Dr. Barbara Sturm Sun Drops SPF 50 for acne-prone skin

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Questions and answers

What the research says

• A new topical panthenol-containing emollient significantly improved transepidermal water loss reduction, stratum corneum hydration, and intercellular lipid lamellae length compared with control in healthy subjects without negatively impacting bacterial viability.

  The Journal of Dermatological Treatment, 2017

• Topical dexpanthenol acts as a moisturizer, improves stratum corneum hydration, accelerates wound healing and epidermal regeneration, reduces erythema, and improves symptoms of skin irritation compared to vehicle or no pretreatment.

  American Journal of Clinical Dermatology, 2002

• A single application of a moisturizing fluid containing hyaluronic acid 1%, glycerin 5%, and Centella asiatica stem cells extract significantly increased skin hydration by 29% and reduced transepidermal water loss at 24 hours compared to baseline and an untreated control site in twenty healthy women.

  Clinical, Cosmetic and Investigational Dermatology, 2017

• Topical formulations containing ascorbyl tetraisopalmitate, coenzyme Q10, green tea polyphenols, and resveratrol reduced the release of inflammatory cytokines and attenuated inflammatory signs compared to untreated skin and vehicle in 25 Japanese volunteers exposed to sodium dodecyl sulfate.

  European Journal of Pharmaceutics and Biopharmaceutics, 2017

• Carboxymethyl beta-glucan promoted wound healing, reduced inflammation, improved barrier function, and boosted collagen production by interacting with Dectin-1 receptors in in vitro assays and a 3D human full-thickness wounded skin model.

  International Journal of Cosmetic Science, 2026

• 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

• Topical application of 0.1% hyaluronic acid formulations of different molecular weights led to significant improvements in skin hydration and elasticity, with low-molecular-weight formulations also significantly reducing wrinkle depth in seventy-six female subjects compared to a vehicle control.

  Journal of Drugs in Dermatology, 2011

• Topical application of hyaluronic acid in conjunction with free gingival graft significantly reduced donor site postoperative pain until day 7 compared to normal saline, with no significant differences in graft dimensions or patient satisfaction.

  Clinical Oral Investigations, 2022

• Treatment with a hyaluronic acid-containing mouth rinse or topical gel led to significant lesion reduction, pain relief, and normalization of lesion color in adult patients with minor recurrent aphthous stomatitis, with the gel formulation showing an earlier healing onset at 3 days.

  BMC Oral Health, 2019

• Topical application of an antioxidant serum containing 15% ascorbic acid, 0.5% ferulic acid, and 1% tocopherol prevented particulate matter-induced degradation of extracellular matrix components, inflammation, and oxidative stress in the skin of 15 female volunteers compared to untreated controls.

  Journal of Cosmetic Dermatology, 2025

• Dermatological products containing d-alpha tocopheryl acetate showed non-comedogenic potential with less than a 50% increase in microcomedones in 12 healthy male subjects compared to octyl palmitate.

  Contemporary Clinical Trials Communications, 2021

• Topical application of an antioxidant mix containing 15% ascorbic acid, 0.5% ferulic acid, and 1% tocopherol prevented PM and UV-induced skin barrier perturbation, lipid peroxidation, inflammatory markers, MMP9 activation, and Type I collagen loss in 15 healthy females compared to untreated exposed skin.

  Journal of Cosmetic Dermatology, 2024

• Topical purslane at 5% and 10% concentrations achieved alleviation of symptoms and lesion remission comparable to topical 0.1% triamcinolone acetonide in 34 subjects with oral lichen planus over 90 days.

  BMC Oral Health, 2023

• Facial masks containing low-temperature extracted Portulaca oleracea protect sensitive skin from photothermal stimulation and improve skin barrier function during photorejuvenation.

  Cutaneous and Ocular Toxicology, 2025

• Portulaca oleracea extract ameliorated skin barrier damage and inflammation induced by combined exposure to glycolic acid and UVB in HaCaT cells.

  Cutaneous and Ocular Toxicology, 2022

Ingredients

Water, Ethylhexyl Methoxycinnamate, Diethylamino Hydroxybenzoyl Hexyl Benzoate, Dibutyl Adipate, Ethylhexyl Triazone, Glycerin, Methyl Methacrylate Crosspolymer, Phenylbenzimidazole Sulfonic Acid, Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, Arginine, Cyclohexasiloxane, Lauryl Glucoside, Polyglyceryl-2 Dipolyhydroxystearate, Tocopheryl Acetate, Cassia Alata Leaf Extract, Panthenol, Butylene Glycol, Propylene Glycol, Pentylene Glycol, Phenoxyethanol, Acetamide Mea, Xanthan Gum, Cyclopentasiloxane, Caprylic Capric Triglyceride, Sodium Carboxymethyl Betaglucan, Ascorbyl Tetraisopalmitate, Tocopherol, Pantolactone, Carbomer, Citric Acid, Methylparaben, Ethylparaben, Dna

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.