# Principia vs Rilastil Page: https://lovi.care/skincare/it/compare/principia-vs-rilastil The Lovi Fit is the same in every country; only the stores and prices differ, and the ones here are for Italy. Principia and Rilastil are skincare lines known for their thoughtful cleansers, targeted [serums](https://lovi.care/skincare/it/ingredients/serum), and precise, balanced formulas. The first brand offers standout products like the Gel de Limpeza GL-01 and suits balanced to oily skin best, while the second provides nourishing compositions like the Acnestil and suits sensitive, dry, and mature skin types best. Both help maintain a healthy complexion and restore daily comfort, differing mainly in their specific ingredient approaches and ideal skin types. This page compares some of the most popular Principia and Rilastil products; for every product of both brands, with a fit score for your own skin, [use the Lovi app](https://app.pora.ai/vqqJ/j1xj2b6o?af_sub2=compare&af_sub3=selection_note&af_sub4=pg340d424ec8). ### Popular Principia vs Rilastil products #### Rilastil - [Acnestil](https://lovi.care/skincare/it/p/rilastil/acnestil/for/oily-skin) — Average fit #### Principia - [Gel de Limpeza GL-01](https://lovi.care/skincare/it/p/principia/gel-de-limpeza-gl-01/for/oily-skin) — Average fit ## Questions and answers ### Principia or Rilastil: which is better? Neither brand is universally better, as both Principia with Gel de Limpeza GL-01 and Rilastil with Acnestil show average fit levels for oily skin. Every product on this page for both brands lists no fragrance in its ingredients. ### What is the difference between Principia and Rilastil? Principia was founded more recently in 2020 by Viziera Participações Ltda., while Rilastil has a longer history since 1972 under Istituto Ganassini. Both brands offer products on this page that list no fragrance in their ingredients. ### Which is more affordable, Principia or Rilastil? I am sorry, but the provided page facts do not contain pricing or affordability information for either Principia or Rilastil. ### Which causes fewer breakouts, Principia or Rilastil? Neither brand causes breakouts, but for acne-prone skin, Lovi rates Principia's cleanser as Low fit and Rilastil's Acnestil [serum](https://lovi.care/skincare/it/ingredients/serum) as Average fit. ### When were Principia and Rilastil founded, and who owns them? Principia was founded in 2020 and is owned by Viziera Participações Ltda., while Rilastil was founded in 1972 and is owned by Istituto Ganassini. ### Do any products from Principia or Rilastil contain fragrance? Every product on this page from both Principia and Rilastil lists no fragrance in its ingredients. ### How does the Lovi fit level for oily skin compare between Principia's Gel de Limpeza GL-01 and Rilastil's Acnestil? Both brands achieve the same Lovi fit level for oily skin, as Lovi rates both Principia's Gel de Limpeza GL-01 and Rilastil's Acnestil as Average. ## Research behind their key ingredients - [A Double-Blinded, Randomized, Vehicle-Controlled Study of the Efficacy of Moisturizer Containing Licochalcone A, Decanediol, L-Carnitine, and Salicylic Acid for Prevention of Acne Relapse in Asian Population](https://pubmed.ncbi.nlm.nih.gov/33150170/) Salicylic acid · BioMed Research International, 2020 - [Comparative study of efficacy and safety of 45% mandelic acid versus 30% salicylic acid peels in mild-to-moderate acne vulgaris](https://pubmed.ncbi.nlm.nih.gov/31553119/) Mandelic acid · Journal of Cosmetic Dermatology, 2020 - [Efficacy of a multitargeted, salicylic acid-based dermocosmetic cream compared to benzoyl peroxide 5% in Acne vulgaris: Results from a randomized study](https://pubmed.ncbi.nlm.nih.gov/37941097/) Salicylic acid · Journal of Cosmetic Dermatology, 2024 - [A Salicylic Acid-Based Dermocosmetic is Effective as an Adjunct to Benzoyl Peroxide for Mild to Moderate Acne and as Monotherapy in Maintenance Post Benzoyl Peroxide](https://pubmed.ncbi.nlm.nih.gov/38051857/) Salicylic acid · Journal of Drugs in Dermatology, 2023 - [Chemical peels for acne vulgaris: a systematic review of randomised controlled trials](https://pubmed.ncbi.nlm.nih.gov/29705755/) Mandelic acid · BMJ Open, 2018 - [Randomized prospective study of low-dose isotretinoin alone and combination with salicylic acid and mandelic peel against acne tarda](https://pubmed.ncbi.nlm.nih.gov/35388606/) Mandelic acid · Journal of Cosmetic Dermatology, 2022 - [Impact of dermal emulsions containing diacyl phospholipids, mono acyl phospholipids, sodium lauryl ether sulfate and polysorbate 80 in combination with UVA irradiation on human skin physiology in vivo: A pilot study](https://pubmed.ncbi.nlm.nih.gov/42617898/) Sodium laureth sulfate · International Journal of Pharmaceutics, 2026 ## The brands - Skincare: [Principia](https://lovi.care/skincare/it/brands/principia) - Skincare: [Rilastil](https://lovi.care/skincare/it/brands/rilastil) ## More comparisons - [SKIN1004 vs Principia](https://lovi.care/skincare/it/compare/skin1004-vs-principia) - [SKIN1004 vs Rilastil](https://lovi.care/skincare/it/compare/skin1004-vs-rilastil) - [Anua vs Principia](https://lovi.care/skincare/it/compare/anua-vs-principia) - [Anua vs Rilastil](https://lovi.care/skincare/it/compare/anua-vs-rilastil) - [Medicube vs Principia](https://lovi.care/skincare/it/compare/medicube-vs-principia) - [Medicube vs Rilastil](https://lovi.care/skincare/it/compare/medicube-vs-rilastil) - [The Ordinary vs Principia](https://lovi.care/skincare/it/compare/the-ordinary-vs-principia) - [The Ordinary vs Rilastil](https://lovi.care/skincare/it/compare/the-ordinary-vs-rilastil) - [Beauty of Joseon vs Principia](https://lovi.care/skincare/it/compare/beauty-of-joseon-vs-principia) - [Beauty of Joseon vs Rilastil](https://lovi.care/skincare/it/compare/beauty-of-joseon-vs-rilastil) - [COSRX vs Principia](https://lovi.care/skincare/it/compare/cosrx-vs-principia) - [COSRX vs Rilastil](https://lovi.care/skincare/it/compare/cosrx-vs-rilastil) - [CeraVe vs Principia](https://lovi.care/skincare/it/compare/cerave-vs-principia) - [CeraVe vs Rilastil](https://lovi.care/skincare/it/compare/cerave-vs-rilastil) - [La Roche-Posay vs Principia](https://lovi.care/skincare/it/compare/la-roche-posay-vs-principia) - [La Roche-Posay vs Rilastil](https://lovi.care/skincare/it/compare/la-roche-posay-vs-rilastil) - [Dr. Althea vs Principia](https://lovi.care/skincare/it/compare/dr-althea-vs-principia) - [Dr. Althea vs Rilastil](https://lovi.care/skincare/it/compare/dr-althea-vs-rilastil) - [Some By Mi vs Principia](https://lovi.care/skincare/it/compare/some-by-mi-vs-principia) - [Some By Mi vs Rilastil](https://lovi.care/skincare/it/compare/some-by-mi-vs-rilastil) ## About the Lovi Fit Lovi: Unbiased, science-based skincare AI trained on real user outcomes. Lovi compares products by their fit scores, calculated from the full ingredient list with brand-independent rules its 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. Levels from best to worst: Superior, High, Average, Low, Caution, Warning. Behind this comparison: Nadia Kapleva, MS (Co-founder, Medical Director); Alexey Shagraev, PhD (Co-founder, CEO and CTO); Dr. Sofía Perea Pérez, MD, MSc (Medical Board); Aishani Shah, MD (Medical Board); Asya Zubkova, MS (Medical Board); Hanna Kurets, MD (Medical Board, Medical Advisor); Elina Nazarenko, MD (Medical Board); Victoria Derkova, MS (Medical Board). Page built Nov 8, 2026. More from Lovi: https://lovi.care/skincare/llms.txt ## This page in other countries - United States: https://lovi.care/skincare/compare/principia-vs-rilastil - United Kingdom: https://lovi.care/skincare/uk/compare/principia-vs-rilastil - Ireland: https://lovi.care/skincare/ie/compare/principia-vs-rilastil - Germany: https://lovi.care/skincare/de/compare/principia-vs-rilastil - France: https://lovi.care/skincare/fr/compare/principia-vs-rilastil - Italy: https://lovi.care/skincare/it/compare/principia-vs-rilastil (this page) - Netherlands: https://lovi.care/skincare/nl/compare/principia-vs-rilastil - Spain: https://lovi.care/skincare/es/compare/principia-vs-rilastil - Canada: https://lovi.care/skincare/ca/compare/principia-vs-rilastil - Australia: https://lovi.care/skincare/au/compare/principia-vs-rilastil - Singapore: https://lovi.care/skincare/sg/compare/principia-vs-rilastil - Saudi Arabia: https://lovi.care/skincare/sa/compare/principia-vs-rilastil - United Arab Emirates: https://lovi.care/skincare/ae/compare/principia-vs-rilastil