---
product_id: 509578356
title: "20% Vitamin C Serum, 30ml | With Vitamin E & Ferulic Acid | Glowing & Brightening Skin | Anti-Aging Serum for Wrinkles, Fine Lines & Dark Spots | All Skin Types | 30-Days Pack"
brand: "cos-iq"
price: "2401 som"
currency: KGS
in_stock: true
reviews_count: 8
category: "Cos Iq"
url: https://www.desertcart.kg/products/509578356-20-vitamin-c-serum-30ml-with-vitamin-e-and-ferulic
store_origin: KG
region: Kyrgyzstan
---

# Protects against UVA/UVB & pollution 20% pure Vitamin C serum concentration 41% reduction in oxidative damage 20% Vitamin C Serum, 30ml | With Vitamin E & Ferulic Acid | Glowing & Brightening Skin | Anti-Aging Serum for Wrinkles, Fine Lines & Dark Spots | All Skin Types | 30-Days Pack

**Brand:** cos-iq
**Price:** 2401 som
**Availability:** ✅ In Stock

## Summary

> ✨ Glow like you mean it — because your skin deserves the spotlight!

## Quick Answers

- **What is this?** 20% Vitamin C Serum, 30ml | With Vitamin E & Ferulic Acid | Glowing & Brightening Skin | Anti-Aging Serum for Wrinkles, Fine Lines & Dark Spots | All Skin Types | 30-Days Pack by cos-iq
- **How much does it cost?** 2401 som with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/509578356-20-vitamin-c-serum-30ml-with-vitamin-e-and-ferulic)

## Best For

- cos-iq enthusiasts

## Why This Product

- Trusted cos-iq brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Age Gracefully:** Visibly reduces fine lines, wrinkles & dark spots for a youthful bounce
- • **All-Day Defense:** Powerful antioxidants protect against UV rays, pollution & oxidative stress
- • **Shield Your Glow:** Synergistic Vitamin E & Ferulic Acid combo cuts environmental damage by 41%
- • **Radiance Reloaded:** Potent 20% Ethylated Vitamin C brightens and smooths skin fast
- • **Lightweight Luxury:** Non-greasy, fast-absorbing formula perfect for all skin types and busy lifestyles

## Overview

Cos-IQ 20% Vitamin C Serum is a scientifically formulated anti-aging powerhouse combining 20% pure ethylated Vitamin C with Vitamin E and Ferulic Acid. This 30ml serum delivers visible improvements in skin brightness, elasticity, and tone while reducing wrinkles, fine lines, and dark spots. Clinically proven to reduce oxidative damage from UV rays and pollution by up to 41%, it’s a lightweight, fast-absorbing solution designed for all skin types to achieve radiant, youthful skin in just 30 days.

## Description

Cos-IQ 20% Vitamin C Serum, 30ml | With Vitamin E & Ferulic Acid | Glowing & Brightening Skin | Anti-Aging Serum for Wrinkles, Fine Lines & Dark Spots | All Skin Types | 30-Days Pack : desertcart.in: Beauty

Review: Awesome product, highly recommended - I'm absolutely loving this skin care product. My skin feels smoother, looks brighter, and the fine lines have reduced significantly. The formula is lightweight, non-greasy, and absorbs quickly. Highly recommend for anyone looking for a effective and gentle solution for their skin concerns.
Review: Noticeable Glow and Smooth Skin in Just a Week! - I've been using the COSIQ Vitamin CEF-20% Face Serum for a week now, and I'm genuinely impressed. The texture is lightweight and absorbs quickly without leaving any greasy residue. Within a few days, I noticed my skin looking brighter and more radiant. The serum claims to reduce dark spots and hyperpigmentation, and I can already see a slight improvement in my uneven skin tone. My fine lines also look a bit softer, and my skin feels more elastic and hydrated. I especially love that it uses Ethylated Ascorbic Acid – it's gentle but effective. Overall, a great product if you're looking for brighter, healthier-looking skin. Definitely worth trying!

## Features

- Visible anti-aging benefits, such as the improvement of the appearance of lines and wrinkles, loss of firmness, and brightens skin’s complexion
- All round skin benefits brightens skin vitamin c in 3-o-ethyl ascorbic acid form has an immense brightening effect. It's formulated to make skin glow by removing blemishes and fine lines. Ethylated ascorbic acid is the most potent form vitamin c thats safe to use and penetrates the skin tone, giving it a radiant look.
- Repairs & rejuvenates fights hyperpigmentation hyperpigmentation is caused due to unprotected sun exposure neutralizes free radicals and prevents inflammatory processes to slow down photoaging that causes pigmentation has a direct effect on hyperpigmentation, age spots & sun spots. The antioxidant properties of vitamin c protect against UV, pollution and environment induced photodamage.
- Natural skin health evens skin tone active in fading pigmentation evens out skin tone protects the skin against premature aging triggered by free radicals that cause oxidative stress helps the skin produce collagen and elastin to make our skin soft and bouncy for both men and women maximum results guaranteed with our star ingredient.
- Package Content: 1 Vitamin C-20% Face Serum; Quantity: 30ml; Item Form: Serum

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BTR7SNV1 |
| ASIN  | B0BTR7SNV1 |
| Best Sellers Rank | #10,633 in Beauty ( See Top 100 in Beauty ) #353 in Serums |
| Country of Origin | India |
| Country of Origin  | India |
| Customer Reviews | 4.1 4.1 out of 5 stars (344) |
| Date First Available  | 2 February 2023 |
| Generic Name | Serum |
| Generic Name  | Serum |
| Item Dimensions LxWxH | 20 x 20 x 30 Millimeters |
| Item Dimensions LxWxH  | 20 x 20 x 30 Millimeters |
| Item Weight | 30 g |
| Item Weight  | 30 g |
| Item model number | CEF20 |
| Item model number  | CEF20 |
| Manufacturer | CEF features a synergistic antioxidant combination of 20% pure vitamin C (L-ascorbic acid), 1% vitamin E (alpha tocopherol), and 0.5% ferulic acid to enhance protection against environmental damage caused by free radicals that can contribute to atmospheric aging. CEF is now proven to reduce combined oxidative damage generated by UVA/UVB rays, ozone pollution, and diesel engine exhaust by up to 41%… |
| Manufacturer  | CEF features a synergistic antioxidant combination of 20% pure vitamin C (L-ascorbic acid), 1% vitamin E (alpha tocopherol), and 0.5% ferulic acid to enhance protection against environmental damage caused by free radicals that can contribute to atmospheric aging. CEF is now proven to reduce combined oxidative damage generated by UVA/UVB rays, ozone pollution, and diesel engine exhaust by up to 41%… |
| Net Quantity | 30.0 Milliliters |
| Net Quantity  | 30.0 Milliliters |
| Packer | Inlabs Lifesciences Pvt Ltd., Delhi 110095, Email: care@mycosiq.com |
| Packer  | Inlabs Lifesciences Pvt Ltd., Delhi 110095, Email: care@mycosiq.com |
| Product Dimensions | 2 x 2 x 3 cm; 30 g |
| Product Dimensions  | 2 x 2 x 3 cm; 30 g |

## Product Details

- **Active Ingredients:** Vitamin-C (3-O-Ethyl Ascorbic Acid) Ethylated Ascorbic Acid
- **Age Range (Description):** Adult
- **Brand:** COS-IQ
- **Item Form:** Gel
- **Item Volume:** 30 Millilitres
- **Item dimensions L x W x H:** 20 x 20 x 30 Millimeters
- **Number of Items:** 1
- **Scent:** Unscented
- **Skin Type:** All, Combination, Normal, Oily, Sensitive
- **Special Feature:** Dermatologically Tested, High-Dose Vitamin C, Not Tested On Animals, Unscented

## Images

![20% Vitamin C Serum, 30ml | With Vitamin E & Ferulic Acid | Glowing & Brightening Skin | Anti-Aging Serum for Wrinkles, Fine Lines & Dark Spots | All Skin Types | 30-Days Pack - Image 1](https://m.media-amazon.com/images/I/712k64z34SL.jpg)

## Questions & Answers

**Q: What is the percentage of Niacinamide in this serum?**
A: It contains 20%EAA ethylated ascorbic acid, 1% Alpha Tocopherol & .5% Ferulic acid, it's ingredients is showing niacinamide but there isn't any percentage of same...

## Customer Reviews

### ⭐⭐⭐⭐⭐ Awesome product, highly recommended
*by S***B on 10 October 2025*

I'm absolutely loving this skin care product. My skin feels smoother, looks brighter, and the fine lines have reduced significantly. The formula is lightweight, non-greasy, and absorbs quickly. Highly recommend for anyone looking for a effective and gentle solution for their skin concerns.

### ⭐⭐⭐⭐⭐ Noticeable Glow and Smooth Skin in Just a Week!
*by V***T on 15 June 2025*

I've been using the COSIQ Vitamin CEF-20% Face Serum for a week now, and I'm genuinely impressed. The texture is lightweight and absorbs quickly without leaving any greasy residue. Within a few days, I noticed my skin looking brighter and more radiant. The serum claims to reduce dark spots and hyperpigmentation, and I can already see a slight improvement in my uneven skin tone. My fine lines also look a bit softer, and my skin feels more elastic and hydrated. I especially love that it uses Ethylated Ascorbic Acid – it's gentle but effective. Overall, a great product if you're looking for brighter, healthier-looking skin. Definitely worth trying!

### ⭐⭐⭐⭐ Happy
*by L***A on 21 September 2025*

Happy with the results of this serum. Protects skin from dryness. Very effective for dry skin and texture of serum is good blends well into skin and fragrance is good.

## Frequently Bought Together

- Cos-IQ 20% Vitamin C Serum, 30ml | With Vitamin E & Ferulic Acid | Glowing & Brightening Skin | Anti-Aging Serum for Wrinkles, Fine Lines & Dark Spots | All Skin Types | 30-Days Pack
- Cos-IQ 20% Niacinamide Face Serum For Clear Glowing Skin, Bright Skin, Reduces Dullness, Hydrates & Repairs Skin with Vit B3 & Hyaluronic Acid for Targets Acne Marks | For Women & Men | 30ml
- Cos-IQ CPM 2% Ceramides Moisturizer with Peptides for Intense Moisturizing and Skin Strengthening | Barrier Repair Cream | For Oily, Dry, Normal & Sensitive Skin | 100ml

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*Product available on Desertcart Kyrgyzstan*
*Store origin: KG*
*Last updated: 2026-02-14*