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Allies of Skin vs Principia

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

Allies of Skin and Principia are two thoughtful skincare lines known for distinct formulations and targeted care. The former offers a rich range of moisturizers, serums, and eye products featuring niacinamide that suit dry and mature skin best, while the latter provides precise cleansers designed for balanced to oily skin. Both brands address specific concerns like acne-prone skin with standout treatments such as the Molecular Saviour Probiotics Treatment Mist and the Gel de Limpeza GL-01. Ultimately, Allies of Skin focuses on reducing hyperpigmentation and signs of aging with potent ingredients, whereas Principia emphasizes maintaining a healthy, balanced complexion.

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

Popular Allies of Skin vs Principia products

Questions and answers

Allies of Skin or Principia: which is better?

Allies of Skin is generally a better choice on this page, offering products that Lovi rates as High or Superior for dry, mature, and sensitive skin. In contrast, Principia features only a cleanser whose Lovi fit ranges from Average to Caution.

What is the difference between Allies of Skin and Principia?

Allies of Skin offers a broader range of fragrance-free serums, moisturizers, and eye products that fit dry, mature, and sensitive skin best, while Principia features only a single cleanser on this page with lower skin fit levels.

Which is more affordable, Allies of Skin or Principia?

Principia offers a much more affordable option on this page with its cleanser, whereas reviewers note that Allies of Skin has a high price point across its products.

Which causes fewer breakouts, Allies of Skin or Principia?

Allies of Skin fits acne-prone skin with High or Superior Lovi levels across multiple products on this page, whereas Principia has a Low fit for acne-prone skin.

Which brand has been on the market longer, Allies of Skin or Principia?

Allies of Skin has been on the market longer, having been founded in 2016 compared to Principia, which was founded in 2020.

Do any products from Allies of Skin or Principia contain fragrance in their ingredients?

Every product on this page from both Allies of Skin and Principia lists no fragrance in its ingredients.

Which skin types does Allies of Skin fit best according to its brand-focused routines?

According to its brand-focused routines, Allies of Skin fits dry skin, mature skin, and sensitive 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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