# Principia vs DOT & KEY

Page: https://lovi.care/skincare/es/compare/principia-vs-dot-and-key

The Lovi Fit is the same in every country; only the stores and prices differ, and the ones here are for Spain.

Principia and DOT & KEY are thoughtful skincare collections known for their precise formulas and protective daily care. Principia features gentle cleansers like the Gel de Limpeza GL-01 that suit balanced to oily and acne-prone skin, while DOT & KEY offers sensorially pleasing sunscreens like the WATERMELON COOLING SUNSCREEN with lightweight textures tailored for balanced, combination, and normal skin types. Both lines help maintain a healthy, balanced complexion, differing mainly in their specific product types and ideal skin compatibility.

DOT & KEY is an Indian skincare brand founded in 2018 and owned by FSN E-Commerce Ventures Limited since 2021.

This page compares some of the most popular Principia and DOT & KEY 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=pged522b3248).

### Popular Principia vs DOT & KEY products

#### DOT & KEY

- [WATERMELON COOLING SUNSCREEN](https://lovi.care/skincare/es/p/dot-and-key/watermelon-cooling-sunscreen/for/combination-skin) — Average fit — [€17.00 at Amazon](https://www.amazon.de/dp/B0BQN2YWN5?tag=lovi-care-web-product05-21&linkCode=osi&th=1&psc=1)

#### Principia

- [Gel de Limpeza GL-01](https://lovi.care/skincare/es/p/principia/gel-de-limpeza-gl-01/for/oily-skin) — Average fit

## Questions and answers

### Principia or DOT & KEY: which is better?

Both brands offer solid options on this page, but DOT & KEY achieves an Average fit across all listed skin types including dry and sensitive skin. Principia matches that average level for most types, though Lovi rates it lower for acne-prone skin and cautions against it for dry skin. Every product from both brands lists no fragrance in its ingredients.

### What is the difference between Principia and DOT & KEY?

DOT & KEY offers average fit levels across all skin types for the products on this page, whereas Principia ranges from average to caution, depending on the skin type. Every product on this page from both brands lists no fragrance in its ingredients.

### Which is more affordable, Principia or DOT & KEY?

This page does not provide pricing or affordability information for either Principia or DOT & KEY.

### Which causes fewer breakouts, Principia or DOT & KEY?

DOT & KEY offers an average fit for acne-prone skin with its WATERMELON COOLING SUNSCREEN, while the products on this page from Principia generally show an average to low fit for acne-prone skin. Both fragrance-free brands are unlikely to cause heavy irritation, but suitability varies by specific skin type.

### In what year and country was each brand founded?

Principia was founded in 2020, while DOT & KEY was founded in 2018 in India.

### Which company currently owns Principia and which owns DOT & KEY?

Viziera Participações Ltda. owns Principia, while FSN E-Commerce Ventures Limited owns DOT & KEY.

### Do products from Principia and DOT & KEY contain fragrance?

Every product from both Principia and DOT & KEY on this page lists no fragrance in its ingredients.

## Research behind their key ingredients

- [Skin delivery of epigallocatechin-3-gallate (EGCG) and hyaluronic acid loaded nano-transfersomes for antioxidant and anti-aging effects in UV radiation induced skin damage](https://pubmed.ncbi.nlm.nih.gov/28155509/) Hyaluronic acid · Drug Delivery, 2017
- [Benefits of topical hyaluronic acid for skin quality and signs of skin aging: From literature review to clinical evidence](https://pubmed.ncbi.nlm.nih.gov/36200921/) Hyaluronic acid · Dermatologic Therapy, 2022
- [The 24-hour skin hydration and barrier function effects of a hyaluronic 1%, glycerin 5%, and Centella asiatica stem cells extract moisturizing fluid: an intra-subject, randomized, assessor-blinded study](https://pubmed.ncbi.nlm.nih.gov/28860834/) Glycerin · Clinical, Cosmetic and Investigational Dermatology, 2017
- [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
- [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
- [In vivo and in vitro evaluation of octyl methoxycinnamate liposomes](https://pubmed.ncbi.nlm.nih.gov/24376350/) Ethylhexyl methoxycinnamate · International Journal of Nanomedicine, 2013
- [Comparison of methods for assessing photoprotection against ultraviolet A in vivo](https://pubmed.ncbi.nlm.nih.gov/3819071/) Butyl methoxydibenzoylmethane · Journal of the American Academy of Dermatology, 1987
- [Mitigation of ultraviolet-induced erythema and inflammation by para-hydroxycinnamic acid in human skin](https://pubmed.ncbi.nlm.nih.gov/39138602/) Ethylhexyl methoxycinnamate · International Journal of Cosmetic Science, 2025
- [Facial disbiosis and UV filters](https://pubmed.ncbi.nlm.nih.gov/39499337/) Ethylhexyl methoxycinnamate · Archives of Dermatological Research, 2024
- [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
- [Retrospective Review of Dermal Safety Studies of Organic Sunscreens](https://pubmed.ncbi.nlm.nih.gov/40911743/) Ethylhexyl salicylate · Journal of Drugs in Dermatology, 2025

## The brands

- Skincare: [Principia](https://lovi.care/skincare/es/brands/principia)
- Indian skincare: [DOT & KEY](https://lovi.care/skincare/es/brands/dot-and-key)

## More comparisons

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- [Anua vs DOT & KEY](https://lovi.care/skincare/es/compare/anua-vs-dot-and-key)
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- [Medicube vs DOT & KEY](https://lovi.care/skincare/es/compare/medicube-vs-dot-and-key)
- [The Ordinary vs Principia](https://lovi.care/skincare/es/compare/the-ordinary-vs-principia)
- [The Ordinary vs DOT & KEY](https://lovi.care/skincare/es/compare/the-ordinary-vs-dot-and-key)
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- [COSRX vs DOT & KEY](https://lovi.care/skincare/es/compare/cosrx-vs-dot-and-key)
- [CeraVe vs Principia](https://lovi.care/skincare/es/compare/cerave-vs-principia)
- [CeraVe vs DOT & KEY](https://lovi.care/skincare/es/compare/cerave-vs-dot-and-key)
- [La Roche-Posay vs Principia](https://lovi.care/skincare/es/compare/la-roche-posay-vs-principia)
- [La Roche-Posay vs DOT & KEY](https://lovi.care/skincare/es/compare/la-roche-posay-vs-dot-and-key)
- [Dr. Althea vs Principia](https://lovi.care/skincare/es/compare/dr-althea-vs-principia)
- [Dr. Althea vs DOT & KEY](https://lovi.care/skincare/es/compare/dr-althea-vs-dot-and-key)
- [Some By Mi vs Principia](https://lovi.care/skincare/es/compare/some-by-mi-vs-principia)
- [Some By Mi vs DOT & KEY](https://lovi.care/skincare/es/compare/some-by-mi-vs-dot-and-key)

## 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-dot-and-key
- United Kingdom: https://lovi.care/skincare/uk/compare/principia-vs-dot-and-key
- Ireland: https://lovi.care/skincare/ie/compare/principia-vs-dot-and-key
- Germany: https://lovi.care/skincare/de/compare/principia-vs-dot-and-key
- France: https://lovi.care/skincare/fr/compare/principia-vs-dot-and-key
- Italy: https://lovi.care/skincare/it/compare/principia-vs-dot-and-key
- Netherlands: https://lovi.care/skincare/nl/compare/principia-vs-dot-and-key
- Spain: https://lovi.care/skincare/es/compare/principia-vs-dot-and-key (this page)
- Canada: https://lovi.care/skincare/ca/compare/principia-vs-dot-and-key
- Australia: https://lovi.care/skincare/au/compare/principia-vs-dot-and-key
- Singapore: https://lovi.care/skincare/sg/compare/principia-vs-dot-and-key
- Saudi Arabia: https://lovi.care/skincare/sa/compare/principia-vs-dot-and-key
- United Arab Emirates: https://lovi.care/skincare/ae/compare/principia-vs-dot-and-key