# The INKEY List vs Principia

Page: https://lovi.care/skincare/ae/compare/the-inkey-list-vs-principia

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

The INKEY List is a British skincare brand founded in 2018 and owned by Brand Evangelists for Beauty Limited.

[cosmeticsbusiness.com](https://cosmeticsbusiness.com/the-inkey-list-secures-investment-from-aria-growth-partners--198893) [prnewswire.com](https://www.prnewswire.com/news-releases/global-beauty-disruptor-the-inkey-list-appoints-new-ceo-to-amplify-growth-301810846.html) [theinkeylist.com](https://www.theinkeylist.com/pages/about-us) [tracxn.com](https://tracxn.com/d/companies/the-inkey-list/__lylou6im1ENQnOJYmfksRbHOZN9Zndy2IHXVIhtdWdc)

This page compares some of the most popular The INKEY List and Principia 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=pg6d2ddbf87b).

### Popular The INKEY List vs Principia products

#### The INKEY List

- [Caffeine Eye Cream](https://lovi.care/skincare/ae/p/the-inkey-list/caffeine-eye-cream/for/dry-skin) — Superior fit — [AED 73.13 at Amazon](https://www.amazon.ae/dp/B09N9ZV34Z?tag=lovi00-21&linkCode=osi&th=1&psc=1)
- [Salicylic Acid Cleanser](https://lovi.care/skincare/ae/p/the-inkey-list/salicylic-acid-cleanser/for/combination-skin) — High fit — [AED 51.82 at Amazon](https://www.amazon.ae/dp/B0DTV6D1L2?tag=lovi00-21&linkCode=osi&th=1&psc=1)
- [Collagen Peptide Serum](https://lovi.care/skincare/ae/p/the-inkey-list/collagen-peptide-serum/for/dry-sensitive-skin) — High fit
- [Tranexamic Acid Serum](https://lovi.care/skincare/ae/p/the-inkey-list/tranexamic-acid-serum/for/dark-spots) — High fit — [AED 74.61 at Amazon](https://www.amazon.ae/dp/B09MRFWG29?tag=lovi00-21&linkCode=osi&th=1&psc=1)
- [PHA Toner](https://lovi.care/skincare/ae/p/the-inkey-list/pha-toner/for/acne-prone-skin) — Superior fit — [AED 81.68 at Amazon](https://www.amazon.ae/dp/B09NB35HJB?tag=lovi00-21&linkCode=osi&th=1&psc=1)
- [Omega Water Cream](https://lovi.care/skincare/ae/p/the-inkey-list/omega-water-cream/for/dry-skin) — High fit — [AED 72.71 at Amazon](https://www.amazon.ae/dp/B09TZDXTRT?tag=lovi00-21&linkCode=osi&th=1&psc=1)
- [Oat Cleansing Balm](https://lovi.care/skincare/ae/p/the-inkey-list/oat-cleansing-balm/for/dry-skin) — Superior fit — [AED 90.00 at Amazon](https://www.amazon.ae/dp/B08GJ58Z6M?tag=lovi00-21&linkCode=osi&th=1&psc=1)
- [Hyaluronic Acid Serum](https://lovi.care/skincare/ae/p/the-inkey-list/hyaluronic-acid-serum/for/combination-skin) — High fit — [AED 48.00 at Amazon](https://www.amazon.ae/dp/B09N9XS8DN?tag=lovi00-21&linkCode=osi&th=1&psc=1)

#### Principia

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

## Questions and answers

### The INKEY List or Principia: which is better?

The products on this page from The INKEY List generally offer a wider selection with better Lovi fit levels across skin types than Principia, which features only a single cleanser. Reviewers also frequently highlight The INKEY List for its affordable and hydrating moisturizers.

### What is the difference between The INKEY List and Principia?

The INKEY List offers a wide variety of cleansers, toners, [serums](https://lovi.care/skincare/ae/ingredients/serum), and moisturizers that feature no fragrance and fit sensitive and combination skin well. In contrast, Principia only lists a single cleanser on this page.

### The INKEY List or Principia: which cleanser is better?

The products on this page show that The INKEY List offers multiple cleansers, such as [Salicylic Acid](https://lovi.care/skincare/ae/ingredients/salicylic-acid) Cleanser and [Oat](https://lovi.care/skincare/ae/ingredients/oat) Cleansing Balm, with High to Superior Lovi fit levels for several skin types. In contrast, Principia lists only a single cleanser, Gel de Limpeza GL-01, which has only Average or lower Lovi fit levels across most skin types.

### Which is more affordable, The INKEY List or Principia?

The products on this page for The INKEY List feature affordable moisturizers and affordable serums as noted by reviewers, whereas affordability is not mentioned for Principia.

### Which causes fewer breakouts, The INKEY List or Principia?

The products on this page for The INKEY List sometimes note purging and breakouts among reviewers. For Principia, the page does not provide enough information to compare breakouts directly.

### When was The INKEY List founded compared to Principia?

The INKEY List was founded in 2018 in the United Kingdom, while Principia was founded in 2020.

### Which company owns The INKEY List and which company owns Principia?

Brand Evangelists for Beauty Limited owns The INKEY List, and Viziera Participacoes Ltda. owns Principia.

### Do products from The INKEY List contain fragrance?

Every product on The INKEY List page lists no fragrance in its ingredients.

## Research behind their key ingredients

- [Vitamin A antagonizes decreased cell growth and elevated collagen-degrading matrix metalloproteinases and stimulates collagen accumulation in naturally aged human skin](https://pubmed.ncbi.nlm.nih.gov/10692106/) Retinol · The Journal of Investigative Dermatology, 2000
- [Hyaluronic acid and wound healing](https://pubmed.ncbi.nlm.nih.gov/25877441/) Sodium hyaluronate · Journal of Pharmacy & Pharmaceutical Sciences, 2015
- [The effect of niacinamide on reducing cutaneous pigmentation and suppression of melanosome transfer](https://pubmed.ncbi.nlm.nih.gov/12100180/) Niacinamide · The British Journal of Dermatology, 2002
- [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/) Sodium hyaluronate · 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/) Sodium hyaluronate, Hyaluronic acid · Dermatologic Therapy, 2022
- [Topical use of dexpanthenol in skin disorders](https://pubmed.ncbi.nlm.nih.gov/12113650/) Panthenol · American Journal of Clinical Dermatology, 2002
- [The Effect of Aloe Vera Clinical Trials on Prevention and Healing of Skin Wound: A Systematic Review](https://pubmed.ncbi.nlm.nih.gov/30666070/) Aloe barbadensis leaf juice · Iranian Journal of Medical Sciences, 2019
- [Improvement of naturally aged skin with vitamin A (retinol)](https://pubmed.ncbi.nlm.nih.gov/17515510/) Retinol · Archives of Dermatology, 2007
- [Anti-aging and brightening effects of a topical treatment containing vitamin C, vitamin E, and raspberry leaf cell culture extract: A split-face, randomized controlled trial](https://pubmed.ncbi.nlm.nih.gov/31975502/) Tocopherol · Journal of Cosmetic Dermatology, 2020
- [Molecular basis of retinol anti-ageing properties in naturally aged human skin in vivo](https://pubmed.ncbi.nlm.nih.gov/27261203/) Retinol · International Journal of Cosmetic Science, 2017
- [Effects of ascorbic acid on gingival melanin pigmentation in vitro and in vivo](https://pubmed.ncbi.nlm.nih.gov/19186973/) Ascorbyl glucoside · Journal of Periodontology, 2009
- [Prospective, randomized, double-blind assessment of topical bakuchiol and retinol for facial photoageing](https://pubmed.ncbi.nlm.nih.gov/29947134/) Retinol · The British Journal of Dermatology, 2019
- [Treatment of acne with a combination of propolis, tea tree oil, and Aloe vera compared to erythromycin cream: two double-blind investigations](https://pubmed.ncbi.nlm.nih.gov/30588129/) Aloe barbadensis leaf juice · Clinical Pharmacology, 2018
- [Ceramide 1 and ceramide 3 act synergistically on skin hydration and the transepidermal water loss of sodium lauryl sulfate-irritated skin](https://pubmed.ncbi.nlm.nih.gov/18717861/) Ceramide np · International Journal of Dermatology, 2008
- [Efficacy and Safety of Azelaic Acid Nanocrystal-Loaded In Situ Hydrogel in the Treatment of Acne Vulgaris](https://pubmed.ncbi.nlm.nih.gov/33923739/) Azelaic acid · Pharmaceutics, 2021
- [The moisturizing effects of glycolipid biosurfactants, mannosylerythritol lipids, on human skin](https://pubmed.ncbi.nlm.nih.gov/22790172/) Glycolipids · Journal of Oleo Science, 2012
- [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
- [Randomized controlled study for the anti-aging effect of human adipocyte-derived mesenchymal stem cell media combined with niacinamide after laser therapy](https://pubmed.ncbi.nlm.nih.gov/33103316/) Niacinamide · Journal of Cosmetic Dermatology, 2021
- [The anti-wrinkle efficacy of argireline, a synthetic hexapeptide, in Chinese subjects: a randomized, placebo-controlled study](https://pubmed.ncbi.nlm.nih.gov/23417317/) Acetyl hexapeptide-8 · American Journal of Clinical Dermatology, 2013
- [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
- [Senomorphic activity of a combination of niacinamide and hyaluronic acid: correlation with clinical improvement of skin aging](https://pubmed.ncbi.nlm.nih.gov/39009698/) Niacinamide · Scientific Reports, 2024
- [A new topical panthenol-containing emollient: Results from two randomized controlled studies assessing its skin moisturization and barrier restoration potential, and the effect on skin microflora](https://pubmed.ncbi.nlm.nih.gov/27425824/) Panthenol · The Journal of Dermatological Treatment, 2017
- [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
- [The efficacy of glycolic acid, salicylic acid, gluconolactone, and licochalcone A combined with 0.1% adapalene vs adapalene monotherapy in mild-to-moderate acne vulgaris: a double-blinded within-person comparative study](https://pubmed.ncbi.nlm.nih.gov/30858720/) Gluconolactone · Clinical, Cosmetic and Investigational Dermatology, 2019
- [High molecular compounds (polysaccharides and proanthocyanidins) from Hamamelis virginiana bark: influence on human skin keratinocyte proliferation and differentiation and influence on irritated skin](https://pubmed.ncbi.nlm.nih.gov/11684194/) Witch hazel water · Phytochemistry, 2001
- [Anti-Wrinkle Efficacy of Cross-Linked Hyaluronic Acid-Based Microneedle Patch with Acetyl Hexapeptide-8 and Epidermal Growth Factor on Korean Skin](https://pubmed.ncbi.nlm.nih.gov/33911590/) Acetyl hexapeptide-8 · Annals of Dermatology, 2019
- [A comparative study of gluconolactone versus benzoyl peroxide in the treatment of acne](https://pubmed.ncbi.nlm.nih.gov/1303072/) Gluconolactone · The Australasian Journal of Dermatology, 1992
- [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
- [Evaluation of dermal extracellular matrix and epidermal-dermal junction modifications using matrix-assisted laser desorption/ionization mass spectrometric imaging, in vivo reflectance confocal microscopy, echography, and histology: effect of age and peptide applications](https://pubmed.ncbi.nlm.nih.gov/25817264/) Palmitoyl tripeptide-1, Palmitoyl tetrapeptide-7 · Journal of Cosmetic Dermatology, 2015
- [A Lipid Mixture Enriched by Ceramide NP with Fatty Acids of Diverse Chain Lengths Contributes to Restore the Skin Barrier Function Impaired by Topical Corticosteroid](https://pubmed.ncbi.nlm.nih.gov/34348350/) Ceramide np · Skin Pharmacology and Physiology, 2022
- [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
- [Effects of 15% Azelaic Acid Gel in the Management of Post-Inflammatory Erythema and Post-Inflammatory Hyperpigmentation in Acne Vulgaris](https://pubmed.ncbi.nlm.nih.gov/38734843/) Azelaic acid · Dermatology and Therapy, 2024
- [Chemical peels for acne vulgaris: a systematic review of randomised controlled trials](https://pubmed.ncbi.nlm.nih.gov/29705755/) Mandelic acid · BMJ Open, 2018
- [Efficacy and Tolerability of Topical Nicotinamide Plus Antibacterial Adhesive Agents and Zinc-Pyrrolidone Carboxylic Acid Versus Placebo as an Adjuvant Treatment for Moderate Acne Vulgaris in Indonesia: A Multicenter, Double-blind, Randomized, Controlled Trial](https://pubmed.ncbi.nlm.nih.gov/32983333/) Zinc pca · The Journal of Clinical and Aesthetic Dermatology, 2020
- [Effects of 1,3-propanediol associated, or not, with butylene glycol and/or glycerol on skin hydration and skin barrier function](https://pubmed.ncbi.nlm.nih.gov/37699769/) Propanediol · International Journal of Cosmetic Science, 2024
- [The efficacy study of the combination of tripeptide-10-citrulline and acetyl hexapeptide-3. A prospective, randomized controlled study](https://pubmed.ncbi.nlm.nih.gov/28150423/) Acetyl hexapeptide-8 · Journal of Cosmetic Dermatology, 2017
- [Synergetic Effects of Aloe Vera Extract with Trimethylglycine for Targeted Aquaporin 3 Regulation and Long-Term Skin Hydration](https://pubmed.ncbi.nlm.nih.gov/38611819/) Betaine · Molecules, 2024
- [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
- [Lactobionic acid in a natural alkylpolyglucoside-based vehicle: assessing safety and efficacy aspects in comparison to glycolic acid](https://pubmed.ncbi.nlm.nih.gov/20367666/) Pha polyhydroxy acid · Journal of Cosmetic Dermatology, 2010
- [The use of different concentrations of betaine as a reducing irritation agent in soaps monitored visually and non-invasively](https://pubmed.ncbi.nlm.nih.gov/12535284/) Betaine · Skin Research and Technology, 2003
- [Topical Almond Oil for Prevention of Pressure Injuries: A Single-Blinded Comparison Study](https://pubmed.ncbi.nlm.nih.gov/32379165/) Prunus amygdalus dulcis oil · Journal of Wound, Ostomy, and Continence Nursing, 2020
- [The anti wrinkle efficacy of synthetic hexapeptide (Argireline) in Chinese Subjects](https://pubmed.ncbi.nlm.nih.gov/23607739/) Acetyl hexapeptide-8 · Journal of Cosmetic and Laser Therapy, 2013
- [Propanediol (and) Caprylic Acid (and) Xylitol as a New Single Topical Active Ingredient against Acne: In Vitro and In Vivo Efficacy Assays](https://pubmed.ncbi.nlm.nih.gov/34771112/) Propanediol · Molecules, 2021
- [Evaluation of the Efficacy and Safety of a Panthenol-Enriched Mask for Skin Barrier Recovery After Facial Laser Treatment: Results of a Double-Blind Randomized Controlled Study](https://pubmed.ncbi.nlm.nih.gov/40613435/) Panthenol · Journal of Cosmetic Dermatology, 2025
- [Preliminary safety and in vivo efficacy of Acmella oleracea extract-loaded glycolipid emulsion serum-Effects on ocular irritation, dermal absorption, and facial skin biophysical and microrelief properties](https://pubmed.ncbi.nlm.nih.gov/39617635/) Glycolipids · International Journal of Cosmetic Science, 2025
- [A Double-Blind, 12-Week Study to Evaluate the Antiaging Efficacy of a Cream Containing the NFκB Inhibitor 4-Hexyl-1, 3-Phenylenediol and Ascorbic Acid-2 Glucoside in Adult Females](https://pubmed.ncbi.nlm.nih.gov/27272084/) Ascorbyl glucoside · Journal of Drugs in Dermatology, 2016
- [Poly-γ-Glutamic Acid from a Novel Bacillus subtilis Strain: Strengthening the Skin Barrier and Improving Moisture Retention in Keratinocytes and a Reconstructed Skin Model](https://pubmed.ncbi.nlm.nih.gov/39940752/) Polyglutamic acid · International Journal of Molecular Sciences, 2025
- [Effect of an Emollient Emulsion Containing 15.0% of Caprylic/Capric Triglyceride on the Urocanic Acid of the Stratum Corneum](https://pubmed.ncbi.nlm.nih.gov/37109405/) Caprylic capric triglyceride · Life, 2023
- [Darutoside promotes skin wound healing via regulating macrophage polarization](https://pubmed.ncbi.nlm.nih.gov/40138783/) Darutoside · Molecular Immunology, 2025
- [Treatment with Ascorbyl Glucoside-Arginine Complex Ameliorates Solar Lentigos](https://pubmed.ncbi.nlm.nih.gov/39769217/) Ascorbyl glucoside · International Journal of Molecular Sciences, 2024
- [A polyhydroxy acid skin care regimen provides antiaging effects comparable to an alpha-hydroxyacid regimen](https://pubmed.ncbi.nlm.nih.gov/15002657/) Pha polyhydroxy acid · Cutis, 2004
- [Impact of Hydrocolloid Dressing and Moisturizing Cream as Facial Skin Protectants Among Health Care Workers](https://pubmed.ncbi.nlm.nih.gov/38771104/) Dimethicone · Military Medicine, 2024
- [Targeting Circadian Rhythm for the Regulation of Skin Collagen Metabolism](https://pubmed.ncbi.nlm.nih.gov/41527525/) Palmitoyl tripeptide-1 · Journal of Cosmetic Dermatology, 2026
- [Mechanistic understanding and peptide ingredient screening for type III collagen via biological knowledge graph and molecular docking](https://pubmed.ncbi.nlm.nih.gov/42683869/) Palmitoyl tetrapeptide-7 · International Journal of Cosmetic Science, 2026
- [Clinical Efficacy of Topical Ascorbic Acid 2-Glucoside in Enhancing Outcomes of Laser Gingival Depigmentation: A Randomized Controlled Trial](https://pubmed.ncbi.nlm.nih.gov/42147661/) Ascorbyl glucoside · Cureus, 2026
- [Acai Oil-Based Organogel Containing Hyaluronic Acid for Topical Cosmetic: In Vitro and Ex Vivo Assessment](https://pubmed.ncbi.nlm.nih.gov/39339231/) Euterpe oleracea fruit extract · Pharmaceutics, 2024
- [Split-face evaluation: Gluconolactone plus oxybrasion versus gluconolactone plus microneedling. The effects on skin parameters](https://pubmed.ncbi.nlm.nih.gov/37357656/) Gluconolactone · Skin Research and Technology, 2023
- [Efficacy and safety of combination cream of stimu-tex AS™ (spent grain wax, Argania Spinosa Kernel oil, Butyrospermum Parkii (shea butter) extract), and saccharide isomerate after fractional CO2 laser procedure: split-face, double blinded, randomized controlled trial](https://pubmed.ncbi.nlm.nih.gov/41134387/) Butyrospermum parkii butter shea butter · Lasers in Medical Science, 2025
- [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

- British skincare: [The INKEY List](https://lovi.care/skincare/ae/brands/the-inkey-list)
- Skincare: [Principia](https://lovi.care/skincare/ae/brands/principia)

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## 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

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