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Kiehl's vs SEYOUL

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

Kiehl's and SEYOUL are respected skincare lines offering distinct botanical and scientific preparations for daily routines. The American heritage brand relies on nourishing glycerin and squalane within its expertly formulated moisturizers, serums, toners, and eye products to suit combination and mature skin best. Meanwhile, the second label is known for its nourishing masks and delicate formulas tailored for dry, oily, and combination skin, including standout treatments like the Collagen Night Wrapping Mask for acne-prone skin. While both care for the complexion with quiet precision, they differ in their specific ingredient concentrations, targeted concerns, and overall formulation philosophies.

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 SEYOUL products; for every product of both brands, with a fit score for your own skin, use the Lovi app.

Popular Kiehl's vs SEYOUL products

Questions and answers

Kiehl's or SEYOUL: which is better?

Kiehl's offers a much larger selection of products across multiple categories that Lovi finds to have High or Superior fit levels for various skin types, whereas SEYOUL features only a single mask with lower fit ratings. Reviewers commonly mention that Kiehl's provides lightweight moisturizers and gentle serums, though some users note a high price point and occasional skin irritation.

What is the difference between Kiehl's and SEYOUL?

Kiehl's is an established American skincare brand offering a large variety of products across many skin types, whereas SEYOUL is a newer brand with only one mask featured on this page. Reviewers frequently note that the products on this page for Kiehl's help provide deep hydration, though they can sometimes cause breakouts and irritation.

Which is more affordable, Kiehl's or SEYOUL?

Reviewers on this page often mention that Kiehl's has a high price point, while SEYOUL has no pricing information available here.

Which causes fewer breakouts, Kiehl's or SEYOUL?

Reviews for the products on this page indicate that Kiehl's may cause breakouts and skin irritation, while SEYOUL has insufficient data to compare on this issue.

How do the founding years and corporate ownership of Kiehl's and SEYOUL compare?

Kiehl's was founded in 1851 in the United States and has been owned by L'Oréal S.A. since 2000, whereas SEYOUL was founded in 2022 and is owned by Thành Vinh Holdings.

Which of the two brands offers a wider variety of product types, such as cleansers, serums, and toners, according to the page?

Kiehl's offers a much wider variety of product types on the products on this page, including multiple cleansers, serums, toners, and moisturizers. In contrast, SEYOUL features only a single mask product.

What are the key ingredients found across Kiehl's products?

The key ingredients across the products on this page for Kiehl's include glycerin, vitamin C, squalane, shea butter, and vitamin E.

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

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