# Allies of Skin 20% Vitamin C Brighten + Firm Serum for combination skin

**Lovi Fit: High fit for combination skin.**
Combination Skin Fit: High · Effectiveness: High · Safety: High.

Page: https://lovi.care/skincare/uk/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/combination-skin

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

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

This fit is calculated for the concerns frequently associated with combination skin: an oily T-zone, enlarged pores, and dry cheeks. For scores based on a full skin profile (12D face scan, goals, preferences), use the Lovi app.

A great choice for combination skin; a few serums fit it even better.

## Why this fit

- Excellent brightening and firming are offered for your combination skin due to 3-O-Ethyl Ascorbic Acid and Ergothioneine, which work to even skin tone and improve elasticity, addressing your oily shine concerns.
- Glutathione and Dimethylmethoxy Chromanol provide potent antioxidant protection and further enhance brightening, complementing the serum's primary functions for your skin.
- 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/uk/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/oily-skin): Average
- [Dry skin](https://lovi.care/skincare/uk/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/dry-skin): High
- [Combination skin](https://lovi.care/skincare/uk/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/combination-skin): High (this page)
- [Sensitive skin](https://lovi.care/skincare/uk/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/sensitive-skin): Low
- [Acne-prone skin](https://lovi.care/skincare/uk/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/acne-prone-skin): High
- [Skin with dark spots](https://lovi.care/skincare/uk/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/dark-spots): Average
- [Mature skin](https://lovi.care/skincare/uk/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/mature-skin): Average
- [Dry sensitive skin](https://lovi.care/skincare/uk/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/dry-sensitive-skin): High
- [Oily acne-prone skin](https://lovi.care/skincare/uk/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/oily-acne-prone-skin): High

## 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/))
- 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/))
- 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 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/))
- 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/))
- RayGel reduced skin reaction severity with a lower average score of 93.7 compared to 123.3 for the placebo group in patients undergoing whole breast external-beam irradiation. ([American Journal of Surgery, 2005](https://pubmed.ncbi.nlm.nih.gov/15862509/))
- Combining high-intensity focused ultrasound with a topical agent containing glutathione and hyaluronic acid significantly improves skin quality, fine wrinkles, hyperpigmentation, hydration, and brightness in female volunteers compared to the topical agent alone. ([The Journal of Dermatological Treatment, 2024](https://pubmed.ncbi.nlm.nih.gov/39326871/))
- 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

- Use your serum as part of your PM routine. Start using it 3 times a week and move to daily use if your skin likes it.
- Apply the serum after cleansing and toner, and right before your moisturizer.
- Gently press 2-3 drops of the serum into your skin and wait a minute ⏳for it to soak in.
- Apply the serum on clean and dry skin since your skin is not sensitive.
- Always do a patch test before using the serum for the first time, and avoid the 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 combination skin?

Allies of Skin 20% Vitamin C Brighten + Firm Serum is a great fit because 3-O-Ethyl Ascorbic Acid and Ergothioneine even out your skin tone and improve elasticity while helping address your oily shine concerns. Glutathione and Dimethylmethoxy Chromanol add strong antioxidant protection and extra brightening benefits. The formula is also safe for your skin and is unlikely to cause irritation.
Sources: [Clinical, Cosmetic and Investigational Dermatology, 2014](https://pubmed.ncbi.nlm.nih.gov/25378941/), [Frontiers in Nutrition, 2026](https://pubmed.ncbi.nlm.nih.gov/42698538/)

### Which ingredients make this serum a good fit for combination skin?

This serum is a great fit for your combination skin because 3-O-Ethyl Ascorbic Acid and ergothioneine even out your skin tone, improve elasticity, and help address oily shine. Additionally, glutathione and dimethylmethoxy Chromanol provide strong antioxidant protection to further brighten your skin.
Sources: [Frontiers in Nutrition, 2026](https://pubmed.ncbi.nlm.nih.gov/42698538/), [Clinical, Cosmetic and Investigational Dermatology, 2014](https://pubmed.ncbi.nlm.nih.gov/25378941/)

### What does Ethylated L-Ascorbic Acid do for combination skin?

Ethylated L-Ascorbic Acid helps brighten combination skin while protecting against daily sun damage and environmental stress. It is unlikely to feel heavy or clog pores while providing antioxidant support to keep your skin looking even and fresh.
Sources: [Acta Dermato-venereologica, 1996](https://pubmed.ncbi.nlm.nih.gov/8869680/), [Journal of Pharmaceutical and Biomedical Analysis, 1997](https://pubmed.ncbi.nlm.nih.gov/9172105/)

### What does Glutathione do for combination skin?

Glutathione helps brighten sun-exposed areas and reduce dark spots for combination skin, while also improving moisture and smoothness. It is unlikely to cause irritation and maintains a safe profile for regular use.
Sources: [Clinical, Cosmetic and Investigational Dermatology, 2014](https://pubmed.ncbi.nlm.nih.gov/25378941/), [International Journal of Dermatology, 2025](https://pubmed.ncbi.nlm.nih.gov/39444151/)

### Where does this serum go in a skincare routine for combination skin?

This treatment serum goes in your evening routine after your cleansing toner and before your moisturizer. Putting it in the evening helps keep your routine simple and adds extra safety around sun exposure.

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

You can use this serum with retinol by applying them on alternate nights or by using this vitamin C in the morning and retinol at night to prevent irritation. This formula is safe for your skin, with no risks of harsh effects.

### How often should I use this serum?

This serum is used in the evening, applying it during your nighttime routine for simplicity and extra safety around sun exposure. The formula is safe for your skin with no risks of irritation, and you may also use it in the morning or twice a day if desired.

### Can this serum clog pores, cause breakouts or purging for combination skin?

This serum is unlikely to clog pores or cause breakouts on combination skin, as it is safe and free of harsh ingredients that typically trigger irritation. It also does not contain active exfoliating ingredients, so it is not expected to cause purging.

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

Yes, it has no fragrance and no drying alcohol.

## Alternatives for combination skin

- [Beauty of Joseon Propolis + Niacinamide Glow Serum](https://lovi.care/skincare/uk/p/beauty-of-joseon/propolis-niacinamide-glow-serum/for/combination-skin) — Superior fit — £36.96 at Amazon
- [Neogen Dermalogy Real Niacinamide 15% Firming Serum](https://lovi.care/skincare/uk/p/neogen-dermalogy/real-niacinamide-15-firming-serum/for/combination-skin) — Superior fit — £24.20 at Amazon
- [Augustinus Bader The Serum](https://lovi.care/skincare/uk/p/augustinus-bader/the-serum/for/combination-skin) — Superior fit — £248.00 at Amazon

## Pairs well with

- Cleanser: [Fresh Soy Face Cleanser](https://lovi.care/skincare/uk/p/fresh/soy-face-cleanser/for/combination-skin) — Superior fit — £14.99 at Amazon
- Hydrating Toner: [Paula's Choice Pore-Reducing Toner](https://lovi.care/skincare/uk/p/paula-s-choice/skin-balancing-pore-reducing-toner/for/combination-skin) — Superior fit — £30.37 at Amazon
- Moisturizer: [COSRX Oil-Free Ultra-Moisturizing Lotion with Birch Sap](https://lovi.care/skincare/uk/p/cosrx/oil-free-ultra-moisturizing-lotion-with-birch-sap/for/combination-skin) — Superior fit — £14.80 at Amazon

## Where to buy

- Notino: £73.90 (https://www.notino.co.uk/allies-of-skin/vitamin-c-20-citrus-cells-advanced-firm-glow-serum-brightening-face-serum-with-vitamin-c/p-16349672/)
Prices checked 16 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

## This page in other countries

- United States: https://lovi.care/skincare/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/combination-skin
- United Kingdom: https://lovi.care/skincare/uk/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/combination-skin (this page)
- Ireland: https://lovi.care/skincare/ie/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/combination-skin
- Germany: https://lovi.care/skincare/de/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/combination-skin
- France: https://lovi.care/skincare/fr/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/combination-skin
- Italy: https://lovi.care/skincare/it/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/combination-skin
- Netherlands: https://lovi.care/skincare/nl/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/combination-skin
- Spain: https://lovi.care/skincare/es/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/combination-skin
- Canada: https://lovi.care/skincare/ca/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/combination-skin
- Australia: https://lovi.care/skincare/au/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/combination-skin
- Singapore: https://lovi.care/skincare/sg/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/combination-skin
- Saudi Arabia: https://lovi.care/skincare/sa/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/combination-skin
- United Arab Emirates: https://lovi.care/skincare/ae/p/allies-of-skin/20-vitamin-c-brighten-firm-serum/for/combination-skin