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COSRX vs Principia

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

COSRX and Principia are a Korean skincare brand founded in 2013 and owned by Amorepacific Group since 2024, and a widely loved line known for thoughtful cleansers and precise formulas. Skincare enthusiasts adore the first for its thoughtfully formulated serums, moisturizers, cleansers, masks, and more, which harness proven ingredients like hyaluronic acid, glycerin, and niacinamide. While both brands help maintain a healthy, balanced complexion, COSRX suits acne-prone skin and oily acne-prone skin best, and Principia suits balanced to oily skin best. The brands differ primarily in their standout product choices, targeted formulations, and specific ingredient benefits for addressing blemishes, dark spots, and mature skin.

COSRX is a Korean skincare brand founded in 2013 and owned by Amorepacific Group since 2024.

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This page compares some of the most popular COSRX and Principia products; for every product of both brands, with a fit score for your own skin, use the Lovi app.

Popular COSRX vs Principia products

Questions and answers

COSRX or Principia: which is better?

COSRX offers a much wider range of 38 products with superior fits across multiple skin types, whereas Principia features only a single cleanser on this page.

What is the difference between COSRX and Principia?

COSRX offers a wide range of products that fit acne-prone, oily acne-prone, and oily skin best, whereas Principia lists only a single cleanser on this page. COSRX also features numerous fragrance-free options alongside a single scented sunscreen, while Principia includes no fragrance across its products.

COSRX or Principia: which cleanser is better?

COSRX offers multiple cleansers with Superior and High Lovi fit levels across most skin types, making it a stronger choice than Principia, which features a single cleanser with lower fit ratings.

Which is more affordable, COSRX or Principia?

The provided page facts and studies do not contain pricing information to determine whether COSRX or Principia is more affordable.

Which causes fewer breakouts, COSRX or Principia?

COSRX offers multiple products with Superior or High Lovi fit levels for acne-prone skin, whereas Principia features only a single cleanser with a Low fit for acne-prone skin. Reviewers often mention effective acne control and clearing for COSRX products on this page.

Between COSRX and Principia, which brand offers a wider variety of products on this page?

COSRX offers a much wider variety of products on this page, featuring 38 items across categories like cleansers, moisturizers, serums, and sunscreens, while Principia includes only one product listed on this page.

How do the founding years and countries of origin compare between COSRX and Principia?

COSRX was founded in 2013 in South Korea, whereas Principia was founded in 2020 with its country of origin not provided. Both brands are owned by different parent companies, with Amorepacific Group owning COSRX and Viziera Participações Ltda. owning Principia.

Which of the two brands has products that contain added fragrance, and which has none?

COSRX has one product containing added fragrance, the Vitamin E Vitalizing Sunscreen SPF 50+, while all its other 37 products on this page list no fragrance. Principia has no added fragrance in any of the products on this page.

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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