🇸🇦Saudi Arabia

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 known for their thoughtful array of products. Kiehl's features trusted ingredients like glycerin and squalane to suit dry skin and skin with dark spots best, whereas Principia offers precise formulas that suit balanced to oily skin best. Ultimately, both brands differ through their distinct ingredients and skin type alignments.

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 larger and more diverse product line on this page than Principia, with numerous items achieving high Lovi fit levels for dry skin, skin with dark spots, and combination skin. Reviewers often mention that Kiehl's products provide deep hydration, though some note a high price point and potential skin irritation.

What is the difference between Kiehl's and Principia?

Kiehl's offers a wide range of products with varying fit levels across multiple skin types, whereas Principia currently features a single product on this page with a limited fit.

Kiehl's or Principia: which cleanser is better?

For cleansing, the products on this page show that Kiehl's offers superior fits for oily and oily acne-prone skin with items like Calendula Deep Cleansing Foaming Face Wash, whereas the single Principia cleanser on this page has lower fit levels.

Which is more affordable, Kiehl's or Principia?

The products on this page for Kiehl's frequently face reviews mentioning a high price point. Review data for Principia does not include cost mentions on this page.

Which causes fewer breakouts, Kiehl's or Principia?

Principia lists a single product on this page, whereas reviewers of the products on this page note that Kiehl's may cause breakouts and skin irritation. Lovi gives the single Principia cleanser an Average fit for oily acne-prone skin and a Low fit for acne-prone skin.

Which brand has been on the market longer, Kiehl's or Principia?

Kiehl's has been on the market longer, having been founded in 1851 in the United States, whereas Principia was founded in 2020.

Do both Kiehl's and Principia offer products that are entirely free of fragrance?

Yes, both Kiehl's and Principia offer products that are entirely free of fragrance. For Kiehl's, 26 of the 28 products on this page list no fragrance, while every product on the Principia page lists no fragrance in its ingredients.

Which brand is owned by L'Oréal S.A.?

Kiehl's is owned by L'Oréal S.A.

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?

Scan your face, then any product: Lovi shows how well it fits you and what fits even better.

QR code: get the Lovi app
Download on theApp Store Get it onGoogle Play