Bayer vs REN Clean Skincare

Questions and answers

Research behind their key ingredients

• Efficacy and Safety of Azelaic Acid Nanocrystal-Loaded In Situ Hydrogel in the Treatment of Acne Vulgaris

  Azelaic acid · Pharmaceutics, 2021

• The 24-hour skin hydration and barrier function effects of a hyaluronic 1%, glycerin 5%, and Centella asiatica stem cells extract moisturizing fluid: an intra-subject, randomized, assessor-blinded study

  Glycerin · Clinical, Cosmetic and Investigational Dermatology, 2017

• Double-blind, randomized, placebo-controlled study of a lotion containing triethyl citrate and ethyl linoleate in the treatment of acne vulgaris

  Triethyl citrate · The British Journal of Dermatology, 2007

• Effects of 15% Azelaic Acid Gel in the Management of Post-Inflammatory Erythema and Post-Inflammatory Hyperpigmentation in Acne Vulgaris

  Azelaic acid · Dermatology and Therapy, 2024

• The usefulness of a dermocosmetic containing Myrtus communis extract and azelaic acid for maintenance phase of adult female acne: Results from a randomized exploratory investigator-blinded comparative study

  Azelaic acid · Journal of the European Academy of Dermatology and Venereology, 2023

• Effect of a botanical cleansing lotion on skin sebum and erythema of the face: A randomized controlled blinded half-side comparison

  Salix nigra bark extract willow bark extract · Journal of Cosmetic Dermatology, 2019

• Anti-Inflammatory Effect of a Novel Topical Herbal Composition (VEL-091604) Consisting of Gentian Root, Licorice Root and Willow Bark Extract

  Salix nigra bark extract willow bark extract · Planta Medica, 2019

• An evaluation of the effect of a topical product containing salicin on the visible signs of human skin aging

  Salix nigra bark extract willow bark extract · Journal of Cosmetic Dermatology, 2010

Behind this comparison

Lovi compares products by their fit scores, calculated 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.