1. What is Glutathione?

Ans: Glutathione is a powerful antioxidant that fades pigmentation and brightens skin tone. Its topical application also helps with cellular repair and regeneration for your skin.

2. Why do you need Vitamin C and Glutathione together in one serum?

Ans: Vitamin C and Glutathione are two of the most studied brightening antioxidants in skincare, but what makes them genuinely powerful is how they amplify each other.Vitamin C works by inhibiting the enzyme tyrosinase, which is responsible for melanin production. This directly reduces the formation of dark spots and pigmentation. Glutathione works through a complementary but different pathway, it shifts melanin synthesis away from darker eumelanin toward lighter phaeomelanin, and simultaneously neutralises free radicals that contribute to uneven skin tone.When used together, they target pigmentation from two angles at the same time, which is why the combination delivers faster, more visible brightening than either ingredient alone. Glutathione also helps regenerate and extend the activity of Vitamin C in the skin, meaning your Vitamin C keeps working longer. The result is a formula that does not just brighten, it maintains that brightness.

3. Why does Foxtale use Ethyl Ascorbic Acid (EAA) in this serum instead of pure Vitamin C?

Ans: In our 15% Vitamin C Serum, we use pure L-Ascorbic Acid, the most potent and direct form of Vitamin C. For the Vit C-Gluta Advanced Brightening Serum, we use Ethyl Ascorbic Acid (3-O-Ethyl Ascorbic Acid) for a specific formulation reason: compatibility with Glutathione.Pure L-Ascorbic Acid requires a very low pH (2.5–3.5) to remain stable and effective. Glutathione, however, is most effective at a near-neutral pH. Combining both in the same formula at L-Ascorbic Acid's required pH would compromise the Glutathione's efficacy.Ethyl Ascorbic Acid (EAA) is a stable Vitamin C derivative that remains effective across a wider pH range, which allows both actives to coexist in one formula without either being weakened. EAA is also soluble in both water and oil, enabling it to penetrate the skin more effectively. Once absorbed, EAA is converted into pure Vitamin C inside the skin, delivering the same core benefits, brightening, collagen support, and dark spot reduction, while remaining gentle enough for daily use alongside Glutathione.

4. What skin concerns does this serum specifically target?

Ans: The serum is designed to work on eight interconnected skin concerns:1. Dullness: restores radiance by neutralizing oxidative stress2. Dark spots: from sun exposure or post-acne marks3. Pigmentation: reduces existing melanin deposits4. Melasma: targets stubborn hormonal pigmentation5. Uneven skin tone: evens out patchy, discoloured areas6. Dehydration: hydration boosters support a plump, dewy appearance7. Early signs of ageing: antioxidant protection prevents collagen breakdown8. Boost glow: long-term use helps maintain baseline radiance

5. How quickly will I see results with this 10% Vitamin C + Glutathione serum?

Most users notice a visible improvement in brightness and overall glow within 3 days of consistent use. This early result is driven by Vitamin C's antioxidant action, which quickly addresses oxidative dullness caused by pollution and UV exposure.Deeper results, reduction in dark spots, pigmentation, and melasma, are typically noticeable after 4 to 6 weeks of daily morning and night use.Consistency is the single most important factor. Always follow with a broad-spectrum SPF 50 Sunscreen or higher during the day, since UV exposure directly counteracts the depigmenting effects of both Vitamin C and Glutathione.

6. Is this serum suitable for oily, dry, and sensitive skin?

Ans: Yes. The lightweight gel-cream texture is specifically designed to be breakout-safe and suitable for all skin types.1. Oily and acne-prone skin: Non-comedogenic base absorbs quickly without clogging pores.2. Dry skin: Hydration boosters deliver moisture alongside brightening actives.3. Sensitive skin: Ethyl Ascorbic Acid is gentler than pure L-Ascorbic Acid and is less likely to cause tingling or redness.A patch test is still recommended if you have reactive skin, apply a small amount on the inner arm and wait 24 hours before full facial application.

7. Can I use this serum alongside niacinamide or retinol?

Ans: Niacinamide can be safely layered with this serum. The combination of Vitamin C, Glutathione, and niacinamide provides a complementary brightening effect, each working on a different step of the melanin production pathway.Retinol should be used separately. Use the Foxtale Vitamin C-Glutathione Serum in the morning (followed by SPF), and apply retinol at night. Combining retinol and Vitamin C derivatives in the same step can cause irritation and reduce the efficacy of each active.Avoid using alongside AHA/BHA exfoliants in the same step. If you use an exfoliating toner or acid serum, apply it at a different time of day.

8. Does Glutathione in skincare actually work for skin brightening?

Ans: Yes, topical Glutathione has clinical evidence supporting its role in skin brightening. It works through two mechanisms:1. It inhibits tyrosinase activity (the same enzyme Vitamin C targets), reducing new melanin formation.2. It shifts the type of melanin produced, from darker eumelanin to lighter phaeomelanin, leading to overall brightening of skin tone over time.3. Glutathione is also known as the body's "master antioxidant" because it helps regenerate other antioxidants, including Vitamin C. This is why the Vitamin C + Glutathione combination delivers compounding brightening results, they reinforce each other's mechanisms rather than working in isolation.

9. How should I store this serum and what does it mean if it changes colour?

Ans: Store the Vitamin c - Glutathione serum in a cool, dry place away from direct sunlight and heat. Both Vitamin C and Glutathione are sensitive to light and air exposure.A slight yellowing of the formula over time is normal and does not indicate the product is unsafe. However, if the serum turns a deep orange or brown, the Vitamin C component has begun to oxidise and potency may be reduced.Always close the cap tightly after use. A bathroom with high humidity can accelerate oxidation, a bedside drawer or cabinet is preferable for storage.

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★5.0

10% Vitamin C-Glutathione Advanced Brightening Serum

Improves Dull Skin, Dark Spots & Brightens Skin in 3 Days* | 30 ml

₹645

₹548

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Product Details

Helps With

Hero Ingredients

10% Vit C-Gluta Complex

Hydration Boosters

10% Vit C-Gluta Complex Helps with fading melasma, dark spots and skin brightening

Hydration Boosters Hydrates skin for a plump and dewy look.

For

All Skin Types

Routine

Daily, morning and night 

Foxtale’s 10% Vitamin C + Glutathione Brightening Serum is an advanced formulation with 3-O-Ethyl Ascorbic Acid, the most stable form of Vitamin C. It targets 8 key skin concerns, including dullness, pigmentation, uneven skin tone, and the appearance of melasma, while brightening the skin. Its lightweight gel-cream texture absorbs easily without feeling greasy, making it suitable for all skin types, especially sensitive skin.

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APPLIED

Pairs well with

10% Vit C-Gluta Advanced Brightening Serum

Pair it and save

Glow sunscreen SPF 50, In-Vivo Tested with PA++++

On its own

₹545

In-Pair

₹104

Bundled with your serum, You save ₹441

Super Glow De-tan Face Wash

On its own

₹249

In-Pair

₹104

Bundled with your serum, You save ₹145

57% users saw visibly brighter, more even-toned skin by pairing these products

10% Vit C-Gluta Advanced Brightening Serum

All About 10% Vit C-Gluta Advanced Brightening Serum

Expected Results

Skin feels hydrated and refreshed.

Slide to see expected results

Day 1

Day 3

Day 21

How to use

Complete Your Routine

Step 1. Cleanse

Super Glow De-tan Face Wash

₹ 249|100 ml

Step 1. Cleanse

Super Glow De-tan Face Wash

₹ 249|100 ml

Step 2. Treat

10% Vitamin C-Glutathione Advanced Brightening Serum

₹ 645|30 ml

Step 2. Treat

10% Vit C-Gluta Advanced Brightening Serum

₹ 645|30 ml

Step 3. Moisturize

Vitamin C & Papaya Enzyme Daily Brightening Moisturizer

₹ 345|50 ml

Step 3. Moisturize

Vitamin C & Papaya Enzyme Daily Brightening Moisturizer

₹ 345|50 ml

Step 4. Protect

Glow sunscreen SPF 50, In-Vivo Tested with PA++++

₹ 545|80 ml

Step 4. Protect

Glow sunscreen SPF 50, In-Vivo Tested with PA++++

₹ 545|80 ml

Directions of use

How to Use:

Step 1: Cleanse your face with Super Glow De-Tan Face Wash.
Step 2: Apply 2–3 drops of the 10% Vitamin C-Glutathione Serum onto your face
Step 3: Gently massage until fully absorbed.
Follow with Foxtale Super Glow Moisturizer and Foxtale Vitamin C SPF 50 Sunscreen.
-This serum can be used daily as part of your morning and night routine.
Note: We recommend doing a patch test before use.

Why Is This Beginner-Friendly?

-10% Vitamin C + Glutathione Complex with 3-O-Ethyl Ascorbic Acid (the most stable form of Vitamin C) helps target melanin production gently, reducing dullness and uneven skin tone without making the skin feel irritated or sensitized.
-The combination of Glutathione, Vitamin C, and hydration boosters helps support the skin barrier, while also being non-greasy in nature, keeping the formulation effective yet balanced.

Clinical Study:

*Based on a clinical study conducted with 36 volunteers by an independent lab in September 2025

Full Ingredient List

Aqua, 3-O- Ethyl ascorbic acid, Propanediol, Propylene glycol, Betaine, Glycerin, Glyceryl Glucoside, Glutathione, Phenoxyethanol, Squalane, Sodium Acrylates Copolymer, Lecithin, Undecylenoyl Phenylalanine, Allantoin, Tocopherol, Carbomer, Ethylhexylglycerin, Octenidine HCl, Disodium EDTA, Triethanolamine, Allergen free fragrance

Full Ingredient List

Our 10% Vit C – Gluta Advanced Brightening Serum is

Vegan

Paraben Free

Dermatologically Tested

Cruelty Free

Sulfate Free

Reviewed and Trusted Across the Internet

4(8.8k+)(8.8k+) & 150+ Reviews

150+ Reviews

4.1(8.6k+)(8.6k+) & 300+ Reviews

300+ Reviews

4(850+)(850+) & 200+ Reviews

200+ Reviews

Users see visible brightening and reduced dark spots within 2-3 weeks of consistent daily use. Many report their skin looks noticeably glowing and more even-toned, with compliments from friends on their improved complexion.

Mentioned in 611 reviews

People praise the serum's lightweight, non-sticky texture that absorbs quickly without feeling greasy or heavy. It works well for all skin types, including oily skin, and layers smoothly under sunscreen and moisturizer.

Mentioned in 604 reviews

Reviewers appreciate that the serum feels gentle and non-irritating, leaving skin soft and smooth to the touch. Many say they see results without any redness, roughness, or discomfort from the product.

Mentioned in 592 reviews

Reviews

5.0

★★★★★★★★★★

81 REVIEWS

Ishan C.

★★★★★★★★★★

2 weeks ago

I didn't think it would work so well, I thought it would work just like a normal serum, but no, this is a mind-blowing serum.

Kunal J.

★★★★★★★★★★

3 weeks ago

Absolutely loved this vitamin c glutathione serum

This product is simply amazing. I was already familiar with the brand, but after using this serum, I am definitely going to reorder it. My skin felt incredibly smooth and looked noticeably brighter after just the first application. It is a genuine product that delivers excellent results. thank you!

Harsh ..

★★★★★★★★★★

3 weeks ago

Perfect choice for Glowing skin

Helps to reduce acne marks and give glowing skin .

Sona K.

★★★★★★★★★★

3 weeks ago

Highly recommended Vitamin C Serum

Good product for dark spots and Hyperpigmentation, it fades away my spots from 4 day onwards

10% Vitamin C-Glutathione Advanced Brightening Serum

All About 10% Vit C-Gluta Advanced Brightening Serum

Expected Results

Complete Your Routine

Directions of use

How to Use:

Why Is This Beginner-Friendly?

Clinical Study:

Full Ingredient List

Full Ingredient List

Our 10% Vit C – Gluta Advanced Brightening Serum is

Reviewed and Trusted Across the Internet

FAQs

Additional Information

Science Behind Foxtale's 10% Vitamin C-Glutathione Advanced Brightening Serum