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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 their specialized approaches to daily routines. The American brand is widely loved for its thoughtful array of moisturizers, serums, toners, eye products, and more, all anchored by nourishing ingredients like glycerin and squalane, while the Icelandic brand is cherished for its targeted serums and advanced formulas. Kiehl's suits skin with dark spots and dry skin best, whereas Bioeffect suits mature skin types best. They differ primarily in their core offerings and ingredient philosophies, with glycerin and squalane actively supporting hydration, barrier function, and oxidative stress defense in the former.

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?

Both brands offer targeted options, but BIOEFFECT achieves a Superior Lovi fit for dry and mature skin with its single specialized serum, while Kiehl's provides a much wider range of products that fit various skin types well.

What is the difference between Kiehl's and BIOEFFECT?

Kiehl's offers a wide selection of products on this page suited for various concerns like dry skin and dark spots, whereas BIOEFFECT features a single focused serum with a Superior Lovi fit level for dry and mature skin types. Reviewers often mention lightweight moisturizers and gentle serums for Kiehl's, and every product on the BIOEFFECT page lists no fragrance.

Which is more affordable, Kiehl's or BIOEFFECT?

This page does not provide price information to determine whether Kiehl's or BIOEFFECT is more affordable.

Which causes fewer breakouts, Kiehl's or BIOEFFECT?

When comparing the products on this page, reviewers mention that Kiehl's may sometimes cause breakouts and skin irritation. Meanwhile, the single BIOEFFECT EGF Serum on this page lists acne-prone skin as having a High Lovi fit, and reviewers do not note breakout issues for it.

Which Kiehl's products contain fragrance, and does BIOEFFECT use any fragrance?

Age Defender Moisturizer and Facial Fuel Energizing Moisture Treatment for Men are the Kiehl's products on this page that list fragrance. BIOEFFECT does not use any fragrance in the products on this page.

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. The products on this page for Kiehl's are owned by L'Oréal S.A., while BIOEFFECT is owned by Bioeffect ehf.

What is the Lovi fit level of the BIOEFFECT EGF Serum for dry skin compared to Kiehl's moisturizers?

The BIOEFFECT EGF Serum achieves a Superior Lovi fit level for dry skin. In comparison, Kiehl's moisturizers vary, with the Hydro-Plumping Serum Concentrate reaching a Superior fit level for dry skin while others range from Average to Caution.

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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