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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 skincare lines designed to address diverse complexions through distinct formulations. The first brand is loved for its luxurious moisturizers, potent serums, and targeted eye products featuring powerhouse ingredients like niacinamide, suiting dry and acne-prone skin best. Meanwhile, the second brand is widely known for its thoughtful cleansers and precise formulas, which suit balanced to oily skin best. Ultimately, they differ in their specific product types and ideal skin types, while both help maintain 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 the better choice on this page, as the products on this page offer mostly High and Superior Lovi fits for various skin types and include soothing and anti-aging formulas. In contrast, the single cleanser from Principia achieves mostly Average or lower Lovi fits.

What is the difference between Allies of Skin and Principia?

Allies of Skin offers a wide range of serums, moisturizers, and eye products with high to superior Lovi fit levels across multiple skin types, whereas Principia features only a single cleanser on this page with average to caution fit levels. Allies of Skin relies on key ingredients like niacinamide, which helps reduce cutaneous pigmentation.

The British Journal of Dermatology, 2002

Which is more affordable, Allies of Skin or Principia?

Principia is generally more affordable, whereas reviewers frequently note that Allies of Skin has a high price point.

Which causes fewer breakouts, Allies of Skin or Principia?

Allies of Skin is unlikely to cause breakouts for the products on this page, as its formulas are rated High to Superior for acne-prone skin and include calming serums. Principia is less suited for acne-prone skin, with its cleanser rated Low to Caution.

Which brand has more products featured on the comparison page, Allies of Skin or Principia?

Allies of Skin has more products featured on the comparison page than Principia, as the products on this page include six items from Allies of Skin compared to only one from Principia.

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 the Allies of Skin brand fit best according to its brand-focused routines?

According to its brand-focused routines, the Allies of Skin products on this page fit dry skin, acne-prone skin, and mature 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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