# Allies of Skin 20% Vitamin C Brighten + Firm Serum for oily acne-prone skin

**Lovi Fit: High fit for oily acne-prone skin.**
Oily Skin Fit: High · Effectiveness: High · Safety: High.

Page: https://lovi.care/skincare/it/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/oily-acne-prone-skin

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

Brand: [Allies of Skin](https://lovi.care/skincare/it/brands/allies-of-skin)
Category: [Serums and treatments](https://lovi.care/skincare/it/best/serums)

This fit is calculated for the concerns frequently associated with oily acne-prone skin: shine, breakouts, blemishes, and enlarged pores. For scores based on a full skin profile (12D face scan, goals, preferences), use the Lovi app.

A great choice for oily acne-prone skin; a few serums fit it even better.

## Why this fit

- Offers excellent brightening and firming for your oily skin due to 3-O-Ethyl Ascorbic Acid and Ergothioneine, which work to even skin tone and improve elasticity while also providing antioxidant benefits relevant to your acne and breakouts.
- Gluconolactone offers mild exfoliating effects that help manage oiliness and blemishes, complementing the primary ingredients.
- The formula is safe for your skin, with no risks of irritation due to the absence of prohibited or harsh ingredients.

## Fit by skin type

- [Oily skin](https://lovi.care/skincare/it/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/oily-skin): Average
- [Dry skin](https://lovi.care/skincare/it/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/dry-skin): High
- [Combination skin](https://lovi.care/skincare/it/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/combination-skin): High
- [Sensitive skin](https://lovi.care/skincare/it/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/sensitive-skin): Low
- [Acne-prone skin](https://lovi.care/skincare/it/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/acne-prone-skin): High
- [Skin with dark spots](https://lovi.care/skincare/it/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/dark-spots): Average
- [Mature skin](https://lovi.care/skincare/it/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/mature-skin): Average
- [Dry sensitive skin](https://lovi.care/skincare/it/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/dry-sensitive-skin): High
- [Oily acne-prone skin](https://lovi.care/skincare/it/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/oily-acne-prone-skin): High (this page)

## Key ingredients

Ethylated L-Ascorbic Acid, Glutathione, Citrus Aurantium Dulcis Callus Culture Extract, Acetyl Cysteine, Dimethylmethoxy Chromanol

## What the research says

- A triple combination of ergothioneine, collagen peptides, and sodium hyaluronate attenuated UV-induced skin damage ex vivo and improved facial skin hydration, elasticity, barrier function, and wrinkles in Chinese women. ([Frontiers in Nutrition, 2026](https://pubmed.ncbi.nlm.nih.gov/42698538/))
- A targeted skincare regimen containing active ingredients such as rhodophyceae extract, ergothioneine, and L-carnosine significantly reduced transepidermal water loss by 24.09%, improved skin elasticity, and decreased redness, dryness, and desquamation in thirty-five female Chinese participants over 4 weeks following advanced optimal pulse technology treatment. ([International Journal of Cosmetic Science, 2025](https://pubmed.ncbi.nlm.nih.gov/40497421/))
- Gluconolactone 14% solution significantly improved mild to moderate acne by reducing inflamed and non-inflamed lesions similarly to 5% benzoyl peroxide, but with fewer side-effects in 150 patients. ([The Australasian Journal of Dermatology, 1992](https://pubmed.ncbi.nlm.nih.gov/1303072/))
- Combining 10% gluconolactone chemical peeling with oxybrasion or microneedle mesotherapy increased skin hydration and decreased sebum, pH, and TEWL in twenty-one Caucasian women, with no significant differences between the two methods. ([Skin Research and Technology, 2023](https://pubmed.ncbi.nlm.nih.gov/37357656/))
- Topical application of 5% vitamin C cream significantly improved global clinical scores, increased skin microrelief density, and induced elastic tissue repair in photoaged skin compared to excipient control in healthy female volunteers. ([Experimental Dermatology, 2003](https://pubmed.ncbi.nlm.nih.gov/12823436/))
- Ascorbic acid 2-glucoside gel significantly reduced gingival melanin pigmentation after 4 weeks compared to placebo in 73 subjects with symmetric pigmentation. ([Journal of Periodontology, 2009](https://pubmed.ncbi.nlm.nih.gov/19186973/))
- Topical application of VC-IP cream twice daily for 8 weeks reduces periorbital wrinkles in female subjects compared to a placebo cream. ([Journal of Cosmetic Dermatology, 2022](https://pubmed.ncbi.nlm.nih.gov/34910367/))
- Glutathione amino acid precursors effectively increase cellular glutathione levels, reducing oxidative stress, ATP depletion, and DNA damage in human keratinocytes, clinical subjects, and ex vivo skin compared to controls. ([Journal of the European Academy of Dermatology and Venereology, 2024](https://pubmed.ncbi.nlm.nih.gov/38189670/))
- Topical oxidized glutathione significantly decreases the skin melanin index and improves moisture content, smoothness, wrinkle formation, and elasticity compared to placebo in healthy women. ([Clinical, Cosmetic and Investigational Dermatology, 2014](https://pubmed.ncbi.nlm.nih.gov/25378941/))
- Topical glutathione improves hyperpigmentation, reduces ultraviolet-induced erythema and wrinkles, decreases transepidermal water loss, and enhances antioxidant capacity. ([The Journal of Clinical and Aesthetic Dermatology, 2025](https://pubmed.ncbi.nlm.nih.gov/41416233/))
- Topical N-acetylcysteine plus doxycycline achieved significantly greater improvements in total lesion count, inflammatory lesion count, IGA, GAGS, and CADI scores compared to benzoyl peroxide plus doxycycline in 40 patients with moderate acne vulgaris. ([Dermatology Practical & Conceptual, 2026](https://pubmed.ncbi.nlm.nih.gov/42190184/))
- Topical application of alpha-tocopherol, l-ascorbic acid, alpha-lipoic acid, glutathione ethylester, and N-acetylcysteine decreased UVB-radiation-induced cell death, apoptosis, and lipid peroxidation in ex vivo pig skin explants compared to untreated controls. ([Radiation Research, 2003](https://pubmed.ncbi.nlm.nih.gov/12537526/))
- Topical vitamin C, vitamin E, and acetylcysteine showed similar effects on the healing of experimentally created corneal wounds in rabbits, with no statistically significant differences compared to each other. ([Indian Journal of Ophthalmology, 2020](https://pubmed.ncbi.nlm.nih.gov/33229673/))
- Supplementation of a broad-spectrum sunscreen with Spirulina and dimethylmethoxy chromanol significantly improved skin pigmentation, reduced collagen degradation, and enhanced net elasticity in 44 healthy subjects after 84 days compared to sunscreen alone. ([European Journal of Pharmaceutical Sciences, 2017](https://pubmed.ncbi.nlm.nih.gov/28341613/))

## What reviewers say

Users report this serum provides a noticeable glow and smoother skin texture, effectively brightening dullness and fading dark spots. Its waterless formula can feel sticky or oily if not applied to damp skin as instructed.

- Liked: Visible brightening and glow (mostly mentioned)
- Liked: Smoother skin texture (often mentioned)
- Disliked: Sticky or thick texture (often mentioned)
- Liked: Non-irritating for many (sometimes noted)
- Liked: Stable, potent formula (sometimes noted)
- Disliked: Application difficulty (sometimes noted)
- Disliked: High price point (sometimes noted)
- Disliked: Unpleasant smell (sometimes noted)
- Disliked: Sensitization or reactions (rarely noted)

## How to apply

- Could be used as part of your PM routine. Start 3 times a week and build up to daily use if your skin tolerates it well.
- Apply your serum after cleansing and toning, but before putting on your moisturizer.
- Gently press 2 to 3 drops of the serum into your skin and let it absorb for a minute.
- Apply the serum on clean, dry skin to help manage your blemishes safely.
- Do a patch test before your first use and avoid the delicate eye area.
- Video: https://storage.pora.ai/c879dda8655a61c19d3d8c9ebad6b06d.mp4

## Questions and answers

### What makes Allies of Skin 20% Vitamin C Brighten + Firm Serum a great fit for oily acne-prone skin?

Allies of Skin 20% Vitamin C Brighten + Firm Serum is a great fit because 3-O-Ethyl Ascorbic Acid and Ergothioneine brighten your skin tone and improve elasticity while fighting breakouts, and gluconolactone helps manage excess oil and blemishes without irritation.
Sources: [The Australasian Journal of Dermatology, 1992](https://pubmed.ncbi.nlm.nih.gov/1303072/), [Frontiers in Nutrition, 2026](https://pubmed.ncbi.nlm.nih.gov/42698538/)

### Which ingredients make this serum a good fit for oily acne-prone skin?

3-O-Ethyl Ascorbic Acid and ergothioneine make this serum a great fit by brightening your skin, improving firmness, and providing antioxidants that help with breakouts. Gluconolactone also helps manage oiliness and blemishes through mild exfoliation, while the formula avoids harsh ingredients to keep your skin safe from irritation.
Sources: [The Australasian Journal of Dermatology, 1992](https://pubmed.ncbi.nlm.nih.gov/1303072/), [Frontiers in Nutrition, 2026](https://pubmed.ncbi.nlm.nih.gov/42698538/)

### What does Ethylated L-Ascorbic Acid do for oily acne-prone skin?

Ethylated L-Ascorbic Acid helps brighten dark spots and calms breakouts on oily, acne-prone skin. Vitamin C derivatives like this one have a strong safety profile and are unlikely to clog pores while balancing skin tone.
Sources: [Journal of Cosmetic Dermatology, 2010](https://pubmed.ncbi.nlm.nih.gov/20367669/)

### What does Glutathione do for oily acne-prone skin?

Glutathione helps protect oily, acne-prone skin from daily stress and irritation by acting as an antioxidant that supports a healthy skin barrier. It is unlikely to clog pores, but this skin type also needs ingredients that clear out oil and soothe redness to stay calm and smooth.
Sources: [Journal of the European Academy of Dermatology and Venereology, 2024](https://pubmed.ncbi.nlm.nih.gov/38189670/), [Current Problems in Dermatology, 2001](https://pubmed.ncbi.nlm.nih.gov/11225199/)

### Where does this serum go in a skincare routine for oily acne-prone skin?

This treatment goes in the evening routine after cleansing and before moisturizing, though some people also use it in the morning or twice a day. It has a great safety profile for oily skin and is unlikely to cause irritation.

### Can I use this serum with retinol, and in what order?

You can use this serum with retinol, but it is best to use them at different times of the day to avoid irritation. Apply this vitamin C serum in the morning and reserve your retinol for your evening routine.

### How often should I use this serum?

This treatment serum works best in your evening routine once a week to start, and you may carefully use it more often if your skin tolerates it well with good results. The formula helps manage oiliness and blemishes while brightening your skin safely with a very low risk of irritation.
Sources: [The Australasian Journal of Dermatology, 1992](https://pubmed.ncbi.nlm.nih.gov/1303072/), [Frontiers in Nutrition, 2026](https://pubmed.ncbi.nlm.nih.gov/42698538/)

### Can this serum clog pores, cause breakouts or purging for oily acne-prone skin?

This serum is a great fit and is safe for your skin, with no risks of irritation or clogging pores due to the absence of harsh ingredients. The formula helps manage oiliness and blemishes while providing antioxidant benefits without causing breakouts.
Sources: [The Australasian Journal of Dermatology, 1992](https://pubmed.ncbi.nlm.nih.gov/1303072/), [Skin Research and Technology, 2023](https://pubmed.ncbi.nlm.nih.gov/37357656/)

### Is this serum fragrance-free and alcohol-free?

Yes, it has no fragrance and no drying alcohol.

## Alternatives for oily acne-prone skin

- [Neogen Dermalogy Real Vitamin C Serum](https://lovi.care/skincare/it/p/neogen-dermalogy/real-vitamin-c-serum/for/oily-acne-prone-skin) — Superior fit — €35.10 at Amazon
- [NEOGEN DERMALOGY REAL VITA C SERUM](https://lovi.care/skincare/it/p/neogen-dermalogy/real-vita-c-serum/for/oily-acne-prone-skin) — High fit — €34.95 at Amazon
- [Skin1004 Probio-Cica Intensive Ampoule](https://lovi.care/skincare/it/p/skin1004/probio-cica-intensive-ampoule/for/oily-acne-prone-skin) — High fit — €24.75 at Amazon

## Pairs well with

- Cleanser: [Paula's Choice CLEAR Pore Normalizing Cleanser](https://lovi.care/skincare/it/p/paula-s-choice/clear-pore-normalizing-cleanser/for/oily-acne-prone-skin) — Superior fit — €29.00 at Amazon
- Hydrating Toner: [Dear, Klairs Supple Preparation Unscented Toner](https://lovi.care/skincare/it/p/dear-klairs/supple-preparation-unscented-toner/for/oily-acne-prone-skin) — Superior fit — €18.16 at Amazon
- Moisturizer: [COSRX Oil-Free Ultra-Moisturizing Lotion with Birch Sap](https://lovi.care/skincare/it/p/cosrx/oil-free-ultra-moisturizing-lotion-with-birch-sap/for/oily-acne-prone-skin) — Superior fit — €18.47 at Amazon

## Where to buy

- Notino: €28.00 (https://www.notino.it/allies-of-skin/vitamin-c-siero-rassodante-illuminante/p-16268835/)
- Lookfantastic: €106.95 (https://www.lookfantastic.it/p/allies-of-skin-vitamin-c-20-citrus-cells-advanced-firm-glow-serum-1fl.-oz/17489383/)
Prices checked 10 Oct – 17 Oct 2026.

## Ingredients

Propanediol, Glycerin, 3-O-Ethyl Ascorbic Acid, Benzimidazole Diamond Amidoethyl Urea Carbamoyl Propyl Polymethylsilsesquioxane, Dimethyl Isosorbide, Helianthus Annuus Wax Seed, Polyglyceryl-10 Tristearate, Ethoxydiglycol, Dicaprylyl Ether, Water, Caprylyl Glycol, Citrus Aurantium Dulcis Callus Culture Extract, Glutathione, Acetyl Cysteine, Dimethylmethoxy Chromanol, Ergothioneine, Tocopherol, Gluconolactone, Leuconostoc Radish Root Ferment Filtrate, Xanthan Gum, Silica, Sodium Benzoate, Calcium Gluconate, Phenoxyethanol
## About the Lovi Fit

Lovi: Unbiased, science-based skincare AI trained on real user outcomes.

Lovi calculates every fit score 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 fit score: 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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