# Allies of Skin vs Principia

Page: https://lovi.care/skincare/ie/compare/allies-of-skin-vs-principia

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

Allies of Skin and Principia are two thoughtful skincare lines known for distinct formulations and targeted care. The former offers a rich range of moisturizers, [serums](https://lovi.care/skincare/ie/ingredients/serum), and eye products featuring [niacinamide](https://lovi.care/skincare/ie/ingredients/niacinamide) that suit dry and mature skin best, while the latter provides precise cleansers designed for balanced to oily skin. Both brands address specific concerns like acne-prone skin with standout treatments such as the Molecular Saviour Probiotics Treatment Mist and the Gel de Limpeza GL-01. Ultimately, Allies of Skin focuses on reducing hyperpigmentation and signs of aging with potent ingredients, whereas Principia emphasizes maintaining 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](https://app.pora.ai/vqqJ/j1xj2b6o?af_sub2=compare&af_sub3=selection_note&af_sub4=pge1206b4184).

### Popular Allies of Skin vs Principia products

#### Allies of Skin

- [Copper Tripeptide & Ectoin Advanced Repair Serum](https://lovi.care/skincare/ie/p/allies-of-skin/copper-tripeptide-and-ectoin-advanced-repair-serum/for/oily-acne-prone-skin) — High fit — [€180.33 at Amazon](https://www.amazon.ie/dp/B0DDXZB2BJ?tag=lovi-care-web-product02-21&linkCode=osi&th=1&psc=1)
- [Tranexamic & Arbutin Advanced Brightening Serum](https://lovi.care/skincare/ie/p/allies-of-skin/tranexamic-and-arbutin-advanced-brightening-serum/for/acne-prone-skin) — High fit — [€98.60 at Notino](https://www.notino.ie/allies-of-skin/tranexamic-arbutin-advanced-brightening-serum-to-treat-skin-imperfections/p-16290575/)
- [Retinal & Peptides Repair Night Cream](https://lovi.care/skincare/ie/p/allies-of-skin/retinal-and-peptides-repair-night-cream/for/acne-prone-skin) — Average fit
- [Peptides & Omegas Firming Eye Cream](https://lovi.care/skincare/ie/p/allies-of-skin/peptides-and-omegas-firming-eye-cream/for/dry-skin) — Superior fit — [€85.90 at Notino](https://www.notino.ie/allies-of-skin/peptides-omegas-firming-eye-cream/p-16197681/)
- [Peptides & Antioxidants Firming Daily Treatment](https://lovi.care/skincare/ie/p/allies-of-skin/peptides-and-antioxidants-firming-daily-treatment/for/mature-skin) — Superior fit — [€136.85 at Amazon](https://www.amazon.ie/dp/B0D4DV8CY3?tag=lovi-care-web-product02-21&linkCode=osi&th=1&psc=1)
- [Molecular Saviour Probiotics Treatment Mist](https://lovi.care/skincare/ie/p/allies-of-skin/molecular-saviour-probiotics-treatment-mist/for/acne-prone-skin) — Superior fit — [€70.90 at Notino](https://www.notino.ie/allies-of-skin/molecular-saviour-probiotics-treatment-mist-essential-face-mist-with-antioxidant-effect/p-16301638/)

#### Principia

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

## Questions and answers

### Allies of Skin or Principia: which is better?

Allies of Skin is generally a better choice on this page, offering products that Lovi rates as High or Superior for dry, mature, and sensitive skin. In contrast, Principia features only a cleanser whose Lovi fit ranges from Average to Caution.

### What is the difference between Allies of Skin and Principia?

Allies of Skin offers a broader range of fragrance-free [serums](https://lovi.care/skincare/ie/ingredients/serum), moisturizers, and eye products that fit dry, mature, and sensitive skin best, while Principia features only a single cleanser on this page with lower skin fit levels.

### Which is more affordable, Allies of Skin or Principia?

Principia offers a much more affordable option on this page with its cleanser, whereas reviewers note that Allies of Skin has a high price point across its products.

### Which causes fewer breakouts, Allies of Skin or Principia?

Allies of Skin fits acne-prone skin with High or Superior Lovi levels across multiple products on this page, whereas Principia has a Low fit for acne-prone skin.

### Which brand has been on the market longer, Allies of Skin or Principia?

Allies of Skin has been on the market longer, having been founded in 2016 compared to Principia, which was founded in 2020.

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

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

### Which skin types does Allies of Skin fit best according to its brand-focused routines?

According to its brand-focused routines, Allies of Skin fits dry skin, mature skin, and sensitive skin best.

## Research behind their key ingredients

- [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
- [Cosmetic benefits of astaxanthin on humans subjects](https://pubmed.ncbi.nlm.nih.gov/22428137/) Astaxanthin · Acta Biochimica Polonica, 2012
- [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, Sodium hyaluronate · Dermatologic Therapy, 2022
- [Topical use of dexpanthenol in skin disorders](https://pubmed.ncbi.nlm.nih.gov/12113650/) Panthenol · American Journal of Clinical Dermatology, 2002
- [Regulatory effects of Lactobacillus plantarum-GMNL6 on human skin health by improving skin microbiome](https://pubmed.ncbi.nlm.nih.gov/33526970/) Probiotics · International Journal of Medical Sciences, 2021
- [Lactobacillus reuteri DSM 17938-A comparative study on the effect of probiotics and lysates on human skin](https://pubmed.ncbi.nlm.nih.gov/31021014/) Probiotics · Experimental Dermatology, 2019
- [The Effect of Lactobacillus plantarum Extracellular Vesicles from Korean Women in Their 20s on Skin Aging](https://pubmed.ncbi.nlm.nih.gov/35723322/) Probiotics · Current Issues in Molecular Biology, 2022
- [Prospective, randomized, double-blind assessment of topical bakuchiol and retinol for facial photoageing](https://pubmed.ncbi.nlm.nih.gov/29947134/) Bakuchiol · The British Journal of Dermatology, 2019
- [Design, characterization, and clinical evaluation of argan oil nanostructured lipid carriers to improve skin hydration](https://pubmed.ncbi.nlm.nih.gov/25143733/) Argania spinosa kernel oil · International Journal of Nanomedicine, 2014
- [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
- [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
- [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 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
- [Sunscreens and Cosmetic Formulations Containing Ascorbyl Tetraisopalmitate and Rice Peptides for the Improvement of Skin Photoaging: A Double-blind, Randomized Placebo-controlled Clinical Study](https://pubmed.ncbi.nlm.nih.gov/33529350/) Tetrahexyldecyl ascorbate · Photochemistry and Photobiology, 2021
- [Clinical evidence of the efficacy and safety of a new 3-in-1 anti-aging topical night serum-in-oil containing melatonin, bakuchiol, and ascorbyl tetraisopalmitate: 103 females treated from 28 to 84 days](https://pubmed.ncbi.nlm.nih.gov/30924254/) Tetrahexyldecyl ascorbate · Journal of Cosmetic 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
- [Comparison of clinical efficacies of sodium ascorbyl phosphate, retinol and their combination in acne treatment](https://pubmed.ncbi.nlm.nih.gov/19134126/) Sodium ascorbyl phosphate · International Journal of Cosmetic Science, 2009
- [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
- [Encapsulation of alpha arbutin, a depigmenting agent, in nanosized ethosomes: Invitro and invivo human studies](https://pubmed.ncbi.nlm.nih.gov/37681127/) Alpha-arbutin · Heliyon, 2023
- [A dermocosmetic containing bakuchiol, Ginkgo biloba extract and mannitol improves the efficacy of adapalene in patients with acne vulgaris: result from a controlled randomized trial](https://pubmed.ncbi.nlm.nih.gov/25914553/) Bakuchiol · Clinical, Cosmetic and Investigational Dermatology, 2015
- [Antioxidant-based topical formulations influence on the inflammatory response of Japanese skin: A clinical study using non-invasive techniques](https://pubmed.ncbi.nlm.nih.gov/28385617/) Tetrahexyldecyl ascorbate · European Journal of Pharmaceutics and Biopharmaceutics, 2017
- [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
- [Evaluating the Safety and Efficacy of a Topical Formulation Containing Epidermal Growth Factor, Tranexamic Acid, Vitamin C, Arbutin, Niacinamide and Other Ingredients as Hydroquinone 4% Alternatives to Improve Hyperpigmentation: A Prospective, Randomized, Controlled Split Face Study](https://pubmed.ncbi.nlm.nih.gov/33022197/) Alpha arbutin · Journal of Cosmetic Science, 2020
- [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
- [Whitening effect of alpha-bisabolol in Asian women subjects](https://pubmed.ncbi.nlm.nih.gov/20642768/) Bisabolol · International Journal of Cosmetic Science, 2010
- [Assessment of Combined Ascorbyl Palmitate (AP) and Sodium Ascorbyl Phosphate (SAP) on Facial Skin Sebum Control in Female Healthy Volunteers](https://pubmed.ncbi.nlm.nih.gov/27756097/) Sodium ascorbyl phosphate · Drug Research, 2017
- [A clinical evaluation of the efficacy and tolerability of a novel topical antioxidant formulation featuring vitamin C, astaxanthin, and fermented turmeric](https://pubmed.ncbi.nlm.nih.gov/37608511/) Astaxanthin · Journal of Cosmetic Dermatology, 2023
- [Supramolecular collagen nanoparticles for anti-wrinkle, skin whitening, and moisturizing effects](https://pubmed.ncbi.nlm.nih.gov/39383579/) Palmitoyl tripeptide-5 · Colloids and Surfaces. B, Biointerfaces, 2025
- [Comparative physicochemical stability and clinical anti-wrinkle efficacy of transdermal emulgel preparations of 5% sodium ascorbyl phosphate and or ascorbic acid on human volunteers](https://pubmed.ncbi.nlm.nih.gov/32383548/) Sodium ascorbyl phosphate · Journal of Cosmetic Dermatology, 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
- [Preparation and characterization of astaxanthin-loaded biodegradable polyhydroxybutyrate (PHB) microbeads for personal care and cosmetic applications](https://pubmed.ncbi.nlm.nih.gov/38072340/) Astaxanthin · International Journal of Biological Macromolecules, 2024
- [Prospective randomized double-blind comparative study of topical acetyl zingerone with tetrahexyldecyl ascorbate versus tetrahexyldecyl ascorbate alone on facial photoaging](https://pubmed.ncbi.nlm.nih.gov/38525606/) Tetrahexyldecyl ascorbate · Journal of Cosmetic Dermatology, 2024
- [Clinical efficacy of facial masks containing yoghurt and Opuntia humifusa Raf. (F-YOP)](https://pubmed.ncbi.nlm.nih.gov/22152494/) Yogurt · Journal of Cosmetic Science, 2011
- [A Randomized Controlled Trial of the Genistein Plus Bakuchiol and Vitamins (GEN+) Product for Male Facial Skin: Effects on Skin Appearance and Properties](https://pubmed.ncbi.nlm.nih.gov/41562471/) Bakuchiol · Skin Research and Technology, 2026
- [Augmented Skin Beneficial Effects of Thermus Thermophilus and Bacillus Subtilis Mixed-Culture Ferment Extract by Tripeptide GHK-Cu](https://pubmed.ncbi.nlm.nih.gov/42573538/) Copper tripeptide-1 · Skin Research and Technology, 2026
- [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/) Argania spinosa kernel oil · Lasers in Medical Science, 2025
- [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 tripeptide-1 · International Journal of Cosmetic Science, 2026
- [Prospective, Randomized, Double-Blind Assessment of Supramolecular Bakuchiol and Terminalia Chebula Extract for Facial Photoaging in Chinese Sensitive Skin Population](https://pubmed.ncbi.nlm.nih.gov/41424674/) Bakuchiol · Health Science Reports, 2025
- [Simmondsia chinensis (jojoba) cake fermentation: A new, sustainable technology for advanced skin and scalp care ingredients](https://pubmed.ncbi.nlm.nih.gov/42698229/) Lactobacillus ferment · International Journal of Cosmetic Science, 2026
- [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
- [Effects of a Greek Yoghurt-based Complex on the Human Facial Skin Microbiome](https://pubmed.ncbi.nlm.nih.gov/42049453/) Yogurt · In Vivo, 2026
- [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: [Allies of Skin](https://lovi.care/skincare/ie/brands/allies-of-skin)
- Skincare: [Principia](https://lovi.care/skincare/ie/brands/principia)

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- [La Roche-Posay vs Allies of Skin](https://lovi.care/skincare/ie/compare/la-roche-posay-vs-allies-of-skin)
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- [Dr. Althea vs Allies of Skin](https://lovi.care/skincare/ie/compare/dr-althea-vs-allies-of-skin)
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- [Some By Mi vs Allies of Skin](https://lovi.care/skincare/ie/compare/some-by-mi-vs-allies-of-skin)
- [Some By Mi vs Principia](https://lovi.care/skincare/ie/compare/some-by-mi-vs-principia)

## 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/allies-of-skin-vs-principia
- United Kingdom: https://lovi.care/skincare/uk/compare/allies-of-skin-vs-principia
- Ireland: https://lovi.care/skincare/ie/compare/allies-of-skin-vs-principia (this page)
- Germany: https://lovi.care/skincare/de/compare/allies-of-skin-vs-principia
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- Netherlands: https://lovi.care/skincare/nl/compare/allies-of-skin-vs-principia
- Spain: https://lovi.care/skincare/es/compare/allies-of-skin-vs-principia
- Canada: https://lovi.care/skincare/ca/compare/allies-of-skin-vs-principia
- Australia: https://lovi.care/skincare/au/compare/allies-of-skin-vs-principia
- Singapore: https://lovi.care/skincare/sg/compare/allies-of-skin-vs-principia
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- United Arab Emirates: https://lovi.care/skincare/ae/compare/allies-of-skin-vs-principia