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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 renowned skincare lines that offer distinct approaches to daily beauty routines. Kiehl's is cherished for its thoughtful array of moisturizers, serums, toners, eye products, and more, all anchored by nourishing ingredients like glycerin and squalane, while BIOEFFECT is cherished for its targeted serums and advanced formulas. The former suits skin with dark spots and mature skin best, offering standout choices 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 the latter suits mature skin types best, featuring the EGF Serum for acne-prone skin. They differ primarily in their active compositions and specific target concerns, as glycerin significantly increases hydration and restores epidermal barrier function and squalane counteracts oxidative stress and stimulates fibroblast migration within the American brand's offerings.

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 may suit various skin types, whereas BIOEFFECT features just one serum that Lovi rates as Superior for dry, dry sensitive, and mature skin. Reviewers note that Kiehl's provides lightweight moisturizers and deep hydration, though some mention high prices and potential irritation.

What is the difference between Kiehl's and BIOEFFECT?

Kiehl's offers a wide range of skincare products that Lovi rates best for skin with dark spots, mature skin, and combination skin, whereas BIOEFFECT features a single EGF Serum that Lovi rates as Superior for dry skin, dry sensitive skin, and mature skin. Kiehl's uses fragrance in only two of its products on this page, while BIOEFFECT includes no fragrance in any of its formulations.

Which is more affordable, Kiehl's or BIOEFFECT?

When comparing the products on this page, pricing details are not provided for either Kiehl's or BIOEFFECT, though reviewers often mention that Kiehl's has a high price point.

Which causes fewer breakouts, Kiehl's or BIOEFFECT?

BIOEFFECT offers a single fragrance-free serum on this page with a High Lovi fit level for acne-prone skin, whereas Kiehl's features several products that reviewers note may occasionally cause breakouts and skin irritation.

Which brand offers more fragrance-free skincare options?

Kiehl's offers more fragrance-free skincare options, providing 26 fragrance-free products on this page out of 28 total.

How does the Lovi fit level for dry skin compare between Kiehl's EGF Serum equivalents and BIOEFFECT's EGF Serum?

For dry skin, the products on this page by Kiehl's achieve a Superior Lovi fit level with the Hydro-Plumping Serum Concentrate, while BIOEFFECT's EGF Serum also reaches a Superior fit level.

Which Kiehl's products are rated as superior for oily acne-prone skin?

For oily acne-prone skin, Lovi rates the Calendula Deep Cleansing Foaming Face Wash, Calendula Herbal-Extract Toner, Rare Earth Deep Pore Daily Cleanser, and Ultra Facial Oil-Free Cleanser as superior.

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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