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Kiehl's vs Principia

Rated by Lovi · Unbiased, science-based skincare AI trained on real user outcomes · How the Fit score works

Kiehl's and Principia are skincare brands that offer thoughtful selections of cleansers, moisturizers, serums, toners, and eye products. The first brand is cherished for formulations anchored by nourishing ingredients like glycerin and squalane, while the second is widely loved for precise formulas. Both cater to distinct needs, as the American brand suits skin with dark spots and mature skin best, whereas its counterpart suits balanced to oily skin best. They ultimately differ in their key offerings and target concerns, providing tailored relief through specialized items like the Calendula Herbal-Extract Toner and the Gel de Limpeza GL-01.

Kiehl's is an American skincare brand founded in 1851 and owned by L'Oréal S.A. since 2000.

loreal.comen.wikipedia.org

This page compares some of the most popular Kiehl's and Principia products; for every product of both brands, with a fit score for your own skin, use the Lovi app.

Popular Kiehl's vs Principia products

Questions and answers

Kiehl's or Principia: which is better?

Kiehl's offers a much broader range of products on this page across multiple skin types, while Principia currently features only a single cleanser. Kiehl's fit levels vary widely by product and concern, with several items achieving high ratings for skin with dark spots, mature skin, and combination skin.

What is the difference between Kiehl's and Principia?

Kiehl's offers a wide range of products that fit skin with dark spots, mature skin, and combination skin, whereas Principia features only a single cleanser on this page. Furthermore, the products on this page by Kiehl's mostly list no fragrance with only two exceptions, while every product on this page by Principia lists no fragrance.

Kiehl's or Principia: which cleanser is better?

When comparing cleansers, Kiehl's offers products on this page that achieve superior fit levels for oily and acne-prone skin types, whereas Principia's cleanser shows only average fit for those same skin types.

Which is more affordable, Kiehl's or Principia?

The page facts do not provide pricing information for either Kiehl's or Principia, so it is not possible to determine which brand is more affordable.

Which causes fewer breakouts, Kiehl's or Principia?

Principia is not associated with breakouts on this page, whereas reviewers of the products on this page for Kiehl's sometimes mention that it causes breakouts and skin irritation.

Which brand has been established longer, Kiehl's or Principia?

Kiehl's has been established significantly longer, having been founded in the United States in 1851, whereas Principia was founded much later in 2020.

Do both Kiehl's and Principia offer fragrance-free products?

Yes, both Kiehl's and Principia offer fragrance-free options among the products on this page. For Kiehl's, 26 of 28 products list no fragrance.

What are the main parent companies of Kiehl's and Principia?

Kiehl's is owned by L'Oréal S.A., whereas Principia is owned by Viziera Participações Ltda.

Research behind their key ingredients

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.

  • Nadia Kapleva, MS

    Nadia Kapleva, MS

    Co-founder, Medical Director

    Cosmetic chemist, cosmetologist, aesthetic products developer

  • Alexey Shagraev, PhD

    Alexey Shagraev, PhD

    Co-founder, CEO and CTO

    PhD in computer science, 3x US patent holder, ex-Google, ex-Yandex

  • Dr. Sofía Perea Pérez, MD, MSc

    Dr. Sofía Perea Pérez, MD, MSc

    Medical Board

    Aesthetic medicine practitioner, MSc in Longevity and Anti-Aging Medicine

  • Aishani Shah, MD

    Aishani Shah, MD

    Medical Board

    Specialist dermatologist, MBBS, MD, IFAAD

  • Asya Zubkova, MS

    Asya Zubkova, MS

    Medical Board

    Cosmetic chemist, SCS, IFSCC member

  • Hanna Kurets, MD

    Hanna Kurets, MD

    Medical Board, Medical Advisor

    Dermatology MD

  • Elina Nazarenko, MD

    Elina Nazarenko, MD

    Medical Board

    Dermatology and diagnostic consultant

  • Victoria Derkova, MS

    Victoria Derkova, MS

    Medical Board

    Cosmetic chemist, cosmetic development technologist

How does it fit your skin?

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