Simple and Principia are two thoughtful skincare lines offering reliable daily staples like cleansers, moisturizers, and toners. The first brand is known for gentle formulas featuring niacinamide and glycerin that suit oily, acne-prone, and sensitive skin best, while the second brand provides precise options geared toward balanced to oily skin. They primarily differ in their target skin types and specific ingredient benefits, helping users choose the ideal routine for a healthy complexion.
Simple is a British skincare brand founded in 1960 and owned by Unilever PLC since 2011.
This page compares some of the most popular Simple and Principia products; for every product of both brands, with a fit score for your own skin, use the Lovi app.
Simple is the better choice on this page, offering products on this page with a High fit for sensitive skin, whereas Principia lists lower fits like Caution for dry skin. Glycerin helps provide hydration, and niacinamide helps reduce pigmentation.
What is the difference between Simple and Principia?
Simple offers a broad selection of cleansers, moisturizers, and makeup removers with High to Superior Lovi fit levels for sensitive and acne-prone skin, whereas Principia features just one cleanser on this page that rates only Average for those skin types and cautions for dry skin. Glycerin helps provide hydration across Simple products, while Niacinamide helps target dark spots.
Simple offers a more versatile cleanser range than Principia, as the products on this page achieve Average fit levels for most skin types, whereas Principia's cleanser receives a Caution rating for dry skin.
Which is more affordable, Simple or Principia?
Simple features lightweight, value-friendly moisturizers on the products on this page, whereas affordability information is not provided for Principia.
Which causes fewer breakouts, Simple or Principia?
Simple features products on this page with a range of fit levels for acne-prone skin, whereas the products on this page by Principia may cause caution for dry skin types. Reviewers note that Simple sometimes causes breakouts or irritations.
When were Simple and Principia founded and who owns them?
Simple was founded in 1960 in the United Kingdom and has been owned by Unilever PLC since 2011, while Principia was founded in 2020 and is owned by Viziera Participações Ltda.
Do any products from Simple or Principia contain fragrance?
Every product on this page from both Simple and Principia lists no fragrance in its ingredients.
What are the key ingredients found across Simple products?
The products on this page for Simple include Niacinamide and Glycerin as key ingredients. Glycerin helps improve skin hydration and barrier function.
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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.
