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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 benefits. The first brand offers advanced eye products, targeted serums, and thoughtful moisturizers featuring niacinamide, which studies show improves signs of skin aging and decreases hyperpigmentation. These products suit dry skin and oily acne-prone skin best, featuring standout items like the Molecular Saviour Probiotics Treatment Mist for acne, the Peptides & Antioxidants Firming Daily Treatment for dark spots, and the Peptides & Omegas Firming Eye Cream for mature skin. Meanwhile, the second brand provides thoughtful cleansers and precise formulas that suit balanced to oily skin best, featuring items like the Gel de Limpeza GL-01 to 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, offering a wide selection of fragrance-free serums, moisturizers, and eye creams with high Lovi fit levels across multiple skin types. In contrast, the single Principia product on this page only reaches an Average fit for its best-suited skin types and shows caution for dry skin.

What is the difference between Allies of Skin and Principia?

Allies of Skin offers a wider selection of serums, moisturizers, and eye products on this page that fit dry, combination, and oily acne-prone skin best, whereas Principia features only a single cleanser. Reviewers note that Allies of Skin provides gentle moisturizers and calming serums, though some mention initial irritation.

Which is more affordable, Allies of Skin or Principia?

Principia is more affordable, whereas Allies of Skin carries a high price point.

Which causes fewer breakouts, Allies of Skin or Principia?

Neither brand page provides enough data to say which causes fewer breakouts, although reviewers note that Allies of Skin can cause initial irritation and skin reactions.

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

Allies of Skin has more products featured on this page than Principia, offering six items compared to just one from Principia.

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

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

What are the main skin types that Allies of Skin fits best according to its brand-focused routines?

According to its brand-focused routines, Allies of Skin fits dry skin, oily acne-prone skin, and combination skin best. The products on this page are rated as High or Superior for these skin types across multiple treatments and moisturizers.

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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