Allies of Skin Vitamin C 20% & Citrus Cells Advanced Firm + Glow Serum

Allies of Skin

Vitamin C 20% & Citrus Cells Advanced Firm + Glow Serum

face neck serum

Added Last edited

Fit by skin type

General, ingredient-based — not your personalized match.

Dry
62%
Combination (dry)
62%
Balanced
92%
Combination (oily)
78%
Oily
78%

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24
Ingredients
6
Benefits
2
Actives
Find Dupes

Bringing a high strength vitamin C into your daily rotation, the Allies of Skin Vitamin C 20% and Citrus Cells Advanced Firm and Glow Serum (30ml) steps in when your skin needs a brightening boost. This lightweight serum layers easily and settles fast, helping skin look visibly clearer, smoother and more even over time. Citrus cells and fermented ingredients support nourishment, while urea draws in hydration to keep skin soft and glowy. Reach for it morning or night, under moisturiser, or when your complexion is in need of a refreshing pick me up.

Key Insights

Benefits

6
Anti-Aging
Dark Spot Fading
Evens Skin Tone
Hydration
Oil Control
Soothing

Active Ingredients

2
PHA Vitamin C

About Vitamin C 20% & Citrus Cells Advanced Firm + Glow Serum

Overview

Vitamin C 20% & Citrus Cells Advanced Firm + Glow Serum is a lightweight serum from Allies of Skin. The formula is built mainly around hydration. The ingredient list runs to 24 ingredients, each broken down in full below.

Texture and finish

By its ingredient list the formula reads as light: water and humectants lead, with emollients kept lower in the order. Silicones in the formula tend to give a smooth, blurred finish and help it grip under makeup. Hydration is handled by Propanediol, Glycerin and Benzimidazole Diamond Amidoethyl Urea Carbamoyl Propyl Polymethylsilsesquioxane, humectants that pull water into the upper layers of skin rather than sealing it there.

What the formula does

Hydration: High. Ingredients that pull and hold water in the upper layers of skin, and here that comes from Propanediol, Glycerin, Benzimidazole Diamond Amidoethyl Urea Carbamoyl Propyl Polymethylsilsesquioxane and Dicaprylyl Ether.

Brightening: Moderate. Ingredients that act on uneven tone and post-inflammatory marks, and here that comes from 3-o-ethyl Ascorbic Acid, Dimethylmethoxy Chromanol, Ergothioneine and Tocopherol.

Antioxidant support: Moderate. Ingredients that mop up free radicals from UV and pollution, and here that comes from 3-o-ethyl Ascorbic Acid, Glutathione and Tocopherol.

Who it suits

On richness alone it suits Balanced skin best, and is the least natural fit for Dry and Combination (dry) skin. Nothing in the list is flagged as a common irritant, which is a reasonable starting point for reactive skin — though a patch test is still the only way to know.

What it does not target

The formula contributes little or nothing on barrier support, oil control, cell renewal and firmness signalling. That is not a fault — most products are not meant to do everything — but if one of those is your priority, this is not the product that will address it.

What is not in it

Reading the full list, the formula is fragrance-free, essential-oil-free, no drying alcohol, paraben-free, microplastic-free and sulfate-free. Those claims come from the ingredient list itself, not from the packaging.

Where it fits in a routine

It can be used morning and evening. In a routine it goes after toner, before moisturiser. Apply to clean, dry skin and give it a minute to absorb before the next layer. Introduce one new treatment at a time so you can identify what is working.

This summary is generated from the product's ingredient list. It is not a review, it is not the brand's own marketing claims, and it does not replace advice from a dermatologist.

Pros and cons

Drawn purely from the ingredient list

Pros

  • No fragrance or declared allergens
  • No essential oils
  • No drying alcohol
  • No microplastics
  • Strong humectant content for hydration
  • No common irritants flagged in the list

Things to know

  • One ingredient could feed malassezia (fungal acne)

Which skin types it suits

Scored on how rich or light the formula reads from its INCI order.

Suitable for

  • Balanced skin

May suit

  • Combination (oily) skin
  • Oily skin

Less suitable for

  • Dry skin
  • Combination (dry) skin

Sensitive skin

No ingredient in this formula carries a common-irritant flag, making it a reasonable option for reactive skin. A patch test is still recommended, as individual skin reactivity varies.

Skin concerns

Based on the curated benefits documented for this product's ingredients.

Helps with

  • Anti-Aging 7 ingredients

    Boosts collagen and cell turnover to reduce fine lines and wrinkles

  • Evens Skin Tone 4 ingredients

    Brightens and balances complexion for a more uniform appearance

  • Hydration 4 ingredients

    Attracts and locks in moisture to keep skin plump and dewy

  • Dark Spot Fading 2 ingredients

    Fades hyperpigmentation and evens out dark spots over time

  • Oil Control 1 ingredient

    Regulates sebum production to reduce shine and greasiness

  • Soothing 1 ingredient

    Calms redness, irritation, and inflammation for sensitive skin

Does not target

Anti-Acne Blackhead Reducing Pore Minimizer Smooths Bumpy Skin

None of the ingredients in this formula are associated with these benefits. This is not unusual, as most products are designed to target a limited number of concerns.

Key ingredients

The actives, UV filters and benefit-carrying ingredients in this formula, in the order they are listed.

1st on the list, which puts it at an estimated 10–40% of the formula.

1,3-dihydroxypropane

Hydration

2nd on the list, which puts it at an estimated 5–20% of the formula.

Glycerine ;Glycerol (INN); Glycerol (RIFM); Glycerolum (EP); Glycyl Alcohol; 1,2,3-Propanetriol; 1,2,3-Trihydroxypropane

Hydration Anti-Aging

3rd on the list, which puts it at an estimated 5–20% of the formula.

3-O-Ethyl Ascorbic Acid is the organic compound.

Anti-Aging Evens Skin Tone Dark Spot Fading

9th on the list, which puts it at an estimated 1–5% of the formula.

Dioctyl ether

Hydration

13th on the list, which puts it at an estimated 1–3% of the formula.

Glycine, N-(N-L-.gamma.-glutamyl-L-cysteinyl)-

Anti-Aging

15th on the list, which puts it at an estimated 1–3% of the formula.

3,4-Dihydro-7-methoxy-2,2-dimethyl-2H-1-benzopyran-6-ol

Anti-Aging Evens Skin Tone

16th on the list, which puts it at an estimated 1–3% of the formula.

Ammonium, [1-carboxy-2-(2-mercaptoimidazol-4-yl)ethyl]trimethyl-, hydroxide, inner salt, L-(+)-

Anti-Aging Dark Spot Fading

17th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.

3,4-Dihydro-2,5,7,8-tetramethyl-2-(4,8,12-trimethyltridecyl)-2H-benzopyran-6-ol; .alpha.-tocopherol; Vitamin E

Anti-Aging Evens Skin Tone Soothing

18th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.

D-Glucono-1,5-lactone

Evens Skin Tone Anti-Aging Hydration

21st on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.

Silicon dioxide

Oil Control

Formula analysis

Each axis is scored from the ingredients present and how high up the list they sit.

Hydration High

Ingredients that pull and hold water in the upper layers of skin

Barrier support None

Lipids and repair signals that support skin barrier integrity

Antioxidant support Moderate

Ingredients that mop up free radicals from UV and pollution

Oil control None

Ingredients that moderate sebum or absorb shine

Brightening Moderate

Ingredients that act on uneven tone and post-inflammatory marks

Soothing Low

Ingredients aimed at visible redness and reactivity

Cell renewal None

Retinoids, acids and enzymes that speed surface turnover

Firmness signalling None

Peptides and growth factors that signal for collagen support

Active and supporting ingredients

"Active" here means an ingredient carrying a recorded active type or a recognised UV filter.

Active ingredients (2)

Supporting ingredients (22)

Solvents, emollients, texture agents and preservatives — the formula that carries the actives.

Propanediol Glycerin Benzimidazole Diamond Amidoethyl Urea Carbamoyl Propyl Polymethylsilsesquioxane Dimethyl Isosorbide Helianthus Annuus Seed Wax Polyglyceryl-10 Tristearate Ethoxydiglycol Dicaprylyl Ether Aqua Caprylyl Glycol Citrus Aurantium Dulcis Callus Culture Extract Glutathione Acetyl Cysteine Dimethylmethoxy Chromanol Ergothioneine Tocopherol Leuconostoc/radish Root Ferment Filtrate Xanthan Gum Silica Sodium Benzoate Calcium Gluconate Phenoxyethanol

What is and is not in it

Read from the full ingredient list. A brand's own claim may differ.

Free from

  • Fragrance-free
  • Essential-oil-free
  • No drying alcohol
  • Paraben-free
  • Microplastic-free
  • Sulfate-free
  • Dye-free
  • Oil-free
  • No animal-derived ingredients

Contains

  • Silicones

    Benzimidazole Diamond Amidoethyl Urea Carbamoyl Propyl Polymethylsilsesquioxane

What to layer it with

Judged by the same curated rules our routine checker uses. It reads the ingredients, not the label.

Compatible with

  • Vitamin C (L-ascorbic acid)
  • Benzoyl peroxide
  • Azelaic acid
  • Copper peptides
  • Bakuchiol
  • Niacinamide
  • Hyaluronic acid
  • Ceramides
  • Signal peptides
  • Panthenol
  • Sunscreen

Use with caution

  • Retinoids (retinol, retinal)

    Best kept to separate routines — one in the morning, one at night, or on alternate days.

  • AHAs (glycolic, lactic)

    Can be layered, but the combination raises the irritation risk. Go slowly.

  • BHA (salicylic acid)

    Can be layered, but the combination raises the irritation risk. Go slowly.

  • PHAs (gluconolactone)

    Can be layered, but the combination raises the irritation risk. Go slowly.

Where it fits in a routine

Morning Evening
  1. Cleanse
  2. Toning
  3. Treat
  4. Moisturise
  5. Protect

This product is the "Treat" step.

  • Apply to clean, dry skin and give it a minute to absorb before the next layer.
  • Introduce one new treatment at a time so you can identify what is working.

Safety and suitability

Flags to check, not verdicts. None of this is medical advice — if you are pregnant, breastfeeding or treating a skin condition, ask a doctor.

Pregnancy and breastfeeding
Nothing in this formula is on the standard pregnancy-caution list. That is not clearance — ask your doctor about anything you use daily.
Fungal acne (malassezia)
1 ingredient could feed malassezia: Polyglyceryl-10 Tristearate. That is about the yeast's food supply, not a prediction that you will break out.
Sensitive and reactive skin
No ingredient in this formula carries a common-irritant flag, making it a reasonable option for reactive skin. A patch test is still recommended, as individual skin reactivity varies.

Ingredients by function

Most ingredients do more than one job, so these counts add up to more than the 24 ingredients on the label.

6
Solvent

Dissolves and carries everything else

6
Texture agent

Sets the thickness, spread and stability of the formula

4
Antioxidant

Neutralises free radicals from UV and pollution

3
Humectant

Draws water into the upper layers of skin

3
Preservative

Keeps the product free of microbial growth

2
Active

Changes how skin behaves rather than how it feels

2
Emollient

Softens and smooths by filling gaps between skin cells

2
Plant extract

Botanical material, usually for antioxidants or scent

1
Chelator

Binds trace metals that would otherwise spoil the formula

1
Exfoliant

Loosens or dissolves dead surface cells

1
Occlusive

Forms a film that slows water loss

1
Surfactant

Lifts oil and dirt, or holds oil and water together

Ingredient breakdown

Every ingredient on the label, in order, with what it does and roughly how much of it is likely to be there.

1 Propanediol Texture agent
Estimated level
10–40%
Confidence
Moderate — INCI order above the 1% line
Roles
Texture agent, Solvent

1st on the list, which puts it at an estimated 10–40% of the formula.

1,3-dihydroxypropane

Hydration
4 scientific references
  • PubChem Compound Summary, April 2021, ePublication
  • SpecialChem, Accessed April 2021, ePublication
  • Cosmetic Ingredient Review, June 2018, pages 1-73
  • Cosmetics & Toiletries, May 2013, pages 81-86
2 Glycerin Humectant
Estimated level
5–20%
Confidence
Moderate — INCI order above the 1% line
Roles
Humectant, Occlusive, Texture agent, Solvent

2nd on the list, which puts it at an estimated 5–20% of the formula.

Glycerine ;Glycerol (INN); Glycerol (RIFM); Glycerolum (EP); Glycyl Alcohol; 1,2,3-Propanetriol; 1,2,3-Trihydroxypropane

Hydration Anti-Aging
6 scientific references
  • Journal of Pharmaceutical Investigation, March 2021, pages 223-231
  • International Journal of Toxicology, November/December 2019, Volume 38, Supplement 3, pages 6S-22S
  • International Journal of Cosmetic Science, August 2016, ePublication
  • British Journal of Dermatology, July 2008, pages 23-34
  • Journal of Cosmetic Dermatology, June 2007, pages 75-82
  • Proceedings of the National Academy of Sciences, June 2003, pages 7, 360-7, 365
Estimated level
5–20%
Confidence
Moderate — INCI order above the 1% line
Roles
Active

3rd on the list, which puts it at an estimated 5–20% of the formula.

3-O-Ethyl Ascorbic Acid is the organic compound.

Anti-Aging Evens Skin Tone Dark Spot Fading
5 scientific references
  • Free Radical Biology and Medicine, September 2021, pages 151–169
  • Life, May 2021, pages 1–13
  • International Journal of Pharmaceutics, December 2019, pages 1–9
  • Journal of Cosmetic Science, July-August 2018, pages 233–243
  • AAPS PharmSciTech, June 2016, pages 767–777
Estimated level
2–10%
Confidence
Moderate — INCI order above the 1% line
Roles
Texture agent

4th on the list, which puts it at an estimated 2–10% of the formula.

Benzimidazole Diamond Amidoethyl Urea Carbamoyl Propyl Polymethylsilsesquioxane is the complex reaction product of acyl functionalized diamond with benzimidazole and ethylene diamine which is coupled via isocyanatopropyltriethoxysilane with methylethoxysilanes to form the diamond matrix loaded polymethylsilsesquioxane.

5 Dimethyl Isosorbide Texture agent
Estimated level
2–10%
Confidence
Moderate — INCI order above the 1% line
Roles
Texture agent, Solvent

5th on the list, which puts it at an estimated 2–10% of the formula.

1,4:3,6-Dianhydro-2,5-di-O-methyl-D-glucitol

Estimated level
2–10%
Confidence
Moderate — INCI order above the 1% line

6th on the list, which puts it at an estimated 2–10% of the formula.

Helianthus Annus Seed Wax

Estimated level
1–5%
Confidence
Moderate — INCI order above the 1% line

7th on the list, which puts it at an estimated 1–5% of the formula.

1,2,3-Propanetriol, homopolymer, octadecanoates (1:3) (10 mol glycerol average molar ratio)

8 Ethoxydiglycol Humectant
Estimated level
1–5%
Confidence
Moderate — INCI order above the 1% line
Roles
Humectant, Solvent

8th on the list, which puts it at an estimated 1–5% of the formula.

2-(2-Ethoxyethoxy)ethanol; Carbitol; Diethylene glycol monoethyl ether; DEGEE

9 Dicaprylyl Ether Emollient
Estimated level
1–5%
Confidence
Moderate — INCI order above the 1% line
Roles
Emollient, Solvent

9th on the list, which puts it at an estimated 1–5% of the formula.

Dioctyl ether

Hydration
2 scientific references
  • SpecialChem, Accessed January 2022, ePublication
  • Personal Care Council, December 2021, ePublication
10 Aqua Solvent
Estimated level
1–5%
Confidence
Moderate — INCI order above the 1% line
Roles
Solvent

10th on the list, which puts it at an estimated 1–5% of the formula.

Water

11 Caprylyl Glycol Emollient
Estimated level
1–3%
Confidence
Moderate — INCI order above the 1% line
Roles
Emollient

11th on the list, which puts it at an estimated 1–3% of the formula.

Octane-1,2-diol

Estimated level
1–3%
Confidence
Moderate — INCI order above the 1% line
Roles
Plant extract

12th on the list, which puts it at an estimated 1–3% of the formula.

Citrus Aurantium Dulcis (Orange) Callus Culture Extract is the extract of a culture of the callus of Citrus aurantium dulcis, Rutaceae.

Estimated level
1–3%
Confidence
Moderate — INCI order above the 1% line

13th on the list, which puts it at an estimated 1–3% of the formula.

Glycine, N-(N-L-.gamma.-glutamyl-L-cysteinyl)-

Anti-Aging
8 scientific references
  • Journal of Cosmetic Dermatology, June 2019, pages 728–737
  • Clinical Cosmetic and Investigative Dermatology, April 2017, pages 147-153 and October 2014, pages 267-274
  • Nutrients, August 2017, pages 1-27
  • DermatoEndocrinology, July 2012, pages 308-319
  • Journal of Agricultural and Food Chemistry, 2011, pages 3, 940-3, 949
  • The Dermatologist, October 2011, volume 19, issue 10
  • Journal of Dermatologic Science, May 2010, pages 85-90
  • Free Radical Biology and Medicine, October 1994, pages 333-349
14 Acetyl Cysteine Antioxidant
Estimated level
1–3%
Confidence
Moderate — INCI order above the 1% line
Roles
Antioxidant

14th on the list, which puts it at an estimated 1–3% of the formula.

Acetylcysteine

Estimated level
1–3%
Confidence
Moderate — INCI order above the 1% line
Roles
Antioxidant

15th on the list, which puts it at an estimated 1–3% of the formula.

3,4-Dihydro-7-methoxy-2,2-dimethyl-2H-1-benzopyran-6-ol

Anti-Aging Evens Skin Tone
16 Ergothioneine Antioxidant
Estimated level
1–3%
Confidence
Moderate — INCI order above the 1% line
Roles
Antioxidant

16th on the list, which puts it at an estimated 1–3% of the formula.

Ammonium, [1-carboxy-2-(2-mercaptoimidazol-4-yl)ethyl]trimethyl-, hydroxide, inner salt, L-(+)-

Anti-Aging Dark Spot Fading
7 scientific references
  • Experimental Gerontology, December 2022, pages 1–11
  • Processes, July 2021, pages 1–13
  • Redox Biology, June 2021, pages 1–10
  • International Journal of Molecular Sciences, March 2021, pages 1–11
  • Experimental Cell Research, March 2021, ePublication
  • Polymers, January 2021, pages 1–9
  • Oxidative Medicine and Cellular Longevity, 2020, pages 1–13
17 Tocopherol Antioxidant
Estimated level
under 1%
Confidence
Moderate — listed below the 1% line
Roles
Antioxidant

17th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.

3,4-Dihydro-2,5,7,8-tetramethyl-2-(4,8,12-trimethyltridecyl)-2H-benzopyran-6-ol; .alpha.-tocopherol; Vitamin E

Anti-Aging Evens Skin Tone Soothing
4 scientific references
  • Journal or Agricultural and Food Chemistry, June 2010, pages 7013-7020
  • Journal of Investigative Dermatology, November 2001, pages 1212-1217
  • Canadian Family Physician, July 2006, pages 855-856
  • Dermatologic Surgery, April 1999, pages 311-315
Estimated level
under 1%
Confidence
Moderate — listed below the 1% line
Roles
Active, Chelator

18th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.

D-Glucono-1,5-lactone

Evens Skin Tone Anti-Aging Hydration
Estimated level
under 1%
Confidence
Moderate — listed below the 1% line
Roles
Plant extract, Preservative

19th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.

Leuconostoc/Radish Root Ferment Filtrate is a filtrate of the product obtained by the fermentation of Raphanus sativus roots by the microorganism, Leuconostoc

20 Xanthan Gum Surfactant
Estimated level
under 1%
Confidence
Moderate — listed below the 1% line
Roles
Surfactant, Texture agent

20th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.

Xanthan gum

21 Silica Exfoliant
Estimated level
under 1%
Confidence
Moderate — listed below the 1% line
Roles
Exfoliant, Texture agent

21st on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.

Silicon dioxide

Oil Control
6 scientific references
  • Advances in Colloid and Interface Science, July 2021, page 10, 2437
  • Cosmetic Ingredient Review, October 2019, pages 1-34
  • Nanomedicine, August 2019, pages 2, 243-2, 267
  • Biological and Pharmaceutical Bulletin, 2016, pages 1, 201-1, 205
  • European Journal of Pharmaceutics and Biopharmaceutics, January 2015, pages 116-125
  • Cosmetics & Toiletries, April 2015, pages 36-45
22 Sodium Benzoate Preservative
Estimated level
under 1%
Confidence
Moderate — listed below the 1% line
Roles
Preservative

22nd on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.

Sodium benzoate

23 Calcium Gluconate Humectant
Estimated level
under 1%
Confidence
Moderate — listed below the 1% line
Roles
Humectant

23rd on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.

Calcium gluconate

24 Phenoxyethanol Preservative
Estimated level
under 1%
Confidence
Moderate — listed below the 1% line
Roles
Preservative

24th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.

2-Phenoxyethanol

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Frequently asked questions

What ingredients are in Vitamin C 20% & Citrus Cells Advanced Firm + Glow Serum?

PROPANEDIOL, GLYCERIN, 3-O-ETHYL ASCORBIC ACID, BENZIMIDAZOLE DIAMOND AMIDOETHYL UREA CARBAMOYL PROPYL POLYMETHYLSILSESQUIOXANE, DIMETHYL ISOSORBIDE, HELIANTHUS ANNUUS SEED WAX, POLYGLYCERYL-10 TRISTEARATE, ETHOXYDIGLYCOL, DICAPRYLYL ETHER, AQUA, 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.

What are the active ingredients in Vitamin C 20% & Citrus Cells Advanced Firm + Glow Serum?

3-O-ETHYL ASCORBIC ACID, GLUCONOLACTONE.

How do I use Vitamin C 20% & Citrus Cells Advanced Firm + Glow Serum?

Dab an appropriate amount of the serum gently into clean skin with your fingertips. Apply to the face, neck and chest. Continue with your favourite day/night care products. Use every morning and/or evening.

What skin types is Vitamin C 20% & Citrus Cells Advanced Firm + Glow Serum good for?

Judged on how rich the formula reads from its ingredient list, it suits Balanced skin best. It is the least natural fit for Dry, Combination (dry) skin.

Is Vitamin C 20% & Citrus Cells Advanced Firm + Glow Serum good for sensitive skin?

No ingredient in this formula carries a common-irritant flag, making it a reasonable option for reactive skin. A patch test is still recommended, as individual skin reactivity varies.

Is Vitamin C 20% & Citrus Cells Advanced Firm + Glow Serum fungal acne safe?

One ingredient could feed malassezia: Polyglyceryl-10 Tristearate. That describes the yeast's food supply, not a prediction that it will cause a breakout.

Can I use Vitamin C 20% & Citrus Cells Advanced Firm + Glow Serum while pregnant?

Nothing in this formula is on the standard pregnancy-caution list. That is not medical clearance — check anything you use daily with your doctor or midwife.

Is Vitamin C 20% & Citrus Cells Advanced Firm + Glow Serum fragrance free?

Yes. Reading the full ingredient list, this formula is fragrance-free.

Does Vitamin C 20% & Citrus Cells Advanced Firm + Glow Serum contain alcohol?

No. Reading the full ingredient list, this formula is no drying alcohol.

Is Vitamin C 20% & Citrus Cells Advanced Firm + Glow Serum silicone free?

No — it contains Benzimidazole Diamond Amidoethyl Urea Carbamoyl Propyl Polymethylsilsesquioxane.

Does Vitamin C 20% & Citrus Cells Advanced Firm + Glow Serum contain essential oils?

No. Reading the full ingredient list, this formula is essential-oil-free.

Is Vitamin C 20% & Citrus Cells Advanced Firm + Glow Serum paraben free?

Yes. Reading the full ingredient list, this formula is paraben-free.

What can I layer with Vitamin C 20% & Citrus Cells Advanced Firm + Glow Serum?

It layers well with Vitamin C (L-ascorbic acid), Benzoyl peroxide, Azelaic acid, Copper peptides, Bakuchiol, Niacinamide. Take more care combining it with Retinoids (retinol, retinal), AHAs (glycolic, lactic), BHA (salicylic acid), PHAs (gluconolactone) — use them in separate routines or on alternate days.

When should I apply Vitamin C 20% & Citrus Cells Advanced Firm + Glow Serum?

Use it morning and evening, after toner, before moisturiser.

How many ingredients does Vitamin C 20% & Citrus Cells Advanced Firm + Glow Serum have?

It lists 24 ingredients, of which 2 are recorded as actives.

Who makes Vitamin C 20% & Citrus Cells Advanced Firm + Glow Serum?

Allies of Skin.

Brand
Allies of Skin

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