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Kiehl's vs BIOEFFECT

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

Kiehl's and BIOEFFECT are two distinct skincare lines known for thoughtful formulations and targeted care. Kiehl's is an American skincare brand founded in 1851 and owned by L'Oréal S.A. since 2000, loved for its nourishing moisturizers, targeted serums, soothing toners, and revitalizing eye products formulated with nourishing glycerin and squalane. Meanwhile, the second brand is cherished for its targeted serums and advanced formulas. While both suit mature skin best, the first brand also suits combination skin, offering specialized items like the Calendula Herbal-Extract Toner for acne-prone skin, the Calendula Deep Cleansing Foaming Face Wash for skin with dark spots, and the Ultra Facial Toner for mature skin, whereas its counterpart features standout products for particular concerns including the EGF Serum for acne-prone skin.

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

Popular Kiehl's vs BIOEFFECT products

Kiehl's vs BIOEFFECT serums and treatments

Questions and answers

Kiehl's or BIOEFFECT: which is better?

Kiehl's offers a wide selection of products on this page that are rated Superior for oily and acne-prone skin types, while BIOEFFECT features a single serum that is rated Superior for dry, dry sensitive, and mature skin. Lovi finds that Kiehl's is unlikely to contain fragrance in most of its formulas, whereas BIOEFFECT lists no fragrance across every product on this page.

What is the difference between Kiehl's and BIOEFFECT?

Kiehl's offers a wide variety of cleansers, toners, serums, and moisturizers that fit mature skin, combination skin, and skin with dark spots well, whereas BIOEFFECT features a single serum that Lovi rates as a Superior fit for dry skin, dry sensitive skin, and mature skin. The products on this page from Kiehl's may occasionally cause breakouts and skin irritation according to reviewers, while every product on this BIOEFFECT page lists no fragrance in its ingredients.

Which is more affordable, Kiehl's or BIOEFFECT?

Reviewers often note that Kiehl's has a high price point, while BIOEFFECT offers a single specialized serum with pricing details not highlighted in the provided page facts.

Which causes fewer breakouts, Kiehl's or BIOEFFECT?

Reviewers often note that Kiehl's causes breakouts and skin irritation, whereas BIOEFFECT lists only one fragrance-free serum on this page that may help limit irritation risks. For acne-prone skin, Lovi rates the products on this page as having a Caution fit level for a few Kiehl's items and a High fit level for BIOEFFECT EGF Serum.

How do the founding years and countries of origin compare between Kiehl's and BIOEFFECT?

Kiehl's was founded in 1851 in the United States, whereas BIOEFFECT was founded later in 2010.

Which Kiehl's products contain fragrance compared to BIOEFFECT where every product lists no fragrance?

Age Defender Moisturizer and Facial Fuel Energizing Moisture Treatment for Men are the two products on this page by Kiehl's that contain fragrance, while BIOEFFECT lists no fragrance in any of its products.

What are the shared key ingredients across Kiehl's products such as Glycerin and Vitamin C?

Glycerin and Vitamin C are shared key ingredients across the products on this page from Kiehl's, alongside 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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