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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 skincare brands offering thoughtful arrays of cleansers, serums, moisturizers, masks, and precise formulas. The Korean brand is beloved for its trusted ingredients like hyaluronic acid, glycerin, and niacinamide, while both suit oily skin and acne-prone skin best. The brands differ as COSRX also suits mature skin and includes standout items such as the Advanced Snail Mucin Gel Cleanser, the Full Fit Propolis Synergy Toner, and the Centella Water Alcohol-Free Toner, whereas Principia features offerings like the Gel de Limpeza GL-01 to help maintain a healthy, balanced complexion.

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 larger variety of products on this page compared to Principia, with many formulas achieving a Superior or High Lovi fit for oily, acne-prone, and dry skin. Reviewers often mention its lightweight absorption and effective acne control.

What is the difference between COSRX and Principia?

COSRX offers a wide range of 38 products featuring key ingredients like hyaluronic acid, niacinamide, and snail mucin, whereas Principia lists only a single cleanser on this page. Reviewers frequently note COSRX for lightweight absorption, deep hydration, and effective acne control.

COSRX or Principia: which cleanser is better?

COSRX offers a wider range of cleansers with better Lovi fit levels across most skin types compared to Principia, whose single cleanser lists low or cautious ratings for dry and acne-prone skin.

Which is more affordable, COSRX or Principia?

The provided page does not contain pricing information to determine whether COSRX or Principia is more affordable.

Which causes fewer breakouts, COSRX or Principia?

COSRX offers a wide range of products with superior or high fit levels for acne-prone skin, whereas Principia features only a single cleanser on this page with a low fit level for acne-prone skin.

Which brand has been established longer, COSRX or Principia?

COSRX has been established longer, having been founded in South Korea in 2013, whereas Principia was founded in 2020.

Do COSRX and Principia products contain fragrance?

COSRX offers 37 fragrance-free products on this page alongside one product containing fragrance, while Principia lists every product on this page as fragrance-free.

Which skin types does COSRX fit best according to its brand-focused routines?

According to its brand-focused routines, COSRX fits oily skin, acne-prone skin, and dry skin best.

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

How does it fit your skin?

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