---
product_id: 509578356
title: "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"
brand: "cos-iq"
price: "KSh2715"
currency: KES
in_stock: true
reviews_count: 8
category: "Cos Iq"
url: https://www.desertcart.co.ke/products/509578356-cos-iq-20-vitamin-c-serum-30ml-with-vitamin-e
store_origin: KE
region: Kenya
---

# Protects against UVA/UVB & pollution 20% pure Vitamin C serum concentration 41% reduction in oxidative damage 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

**Brand:** cos-iq
**Price:** KSh2715
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** 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 by cos-iq
- **How much does it cost?** KSh2715 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.ke](https://www.desertcart.co.ke/products/509578356-cos-iq-20-vitamin-c-serum-30ml-with-vitamin-e)

## 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!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BTR7SNV1 |
| Active Ingredients | Vitamin-C (3-O-Ethyl Ascorbic Acid) Ethylated Ascorbic Acid |
| Age Range (Description) | Adult |
| Age Range Description | Adult |
| Best Sellers Rank | #8,217 in Beauty ( See Top 100 in Beauty ) #276 in Serums |
| Brand | COS-IQ |
| Country of Origin | India |
| Customer Reviews | 4.1 out of 5 stars 350 Reviews |
| Item Dimensions | 20 x 20 x 30 Millimeters |
| Item Form | Gel |
| Item Type Name | Serum |
| Item Volume | 30 Millilitres |
| Item Weight | 30 Grams |
| Item dimensions L x W x H | 20 x 20 x 30 Millimeters |
| 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 Contact Information | 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%… |
| Material Features | Natural |
| Material Type Free | (MEA/DEA/TEA), Silicones, Mineral Oils Free, Paraben Free, Phthalate Free, Sodium Lauryl Sulfate Free, Sulfate Free |
| Number of Items | 1 |
| Other Special Features of the Product | Dermatologically Tested, High-Dose Vitamin C, Not Tested On Animals, Unscented |
| Packer Contact Information | Inlabs Lifesciences Pvt Ltd., Delhi 110095, Email: care@mycosiq.com |
| Product Benefits | Improves skin texture, brightens, reduce dark spots |
| Recommended Uses For Product | Dark Spots, Wrinkles |
| Scent | Unscented |
| Skin Type | All, Combination, Normal, Oily, Sensitive |
| Special Feature | Dermatologically Tested, High-Dose Vitamin C, Not Tested On Animals, Unscented |
| Target Use Body Part | Face |
| Unit Count | 30.0 Milliliters |
| Usage | Daily potent Vitamin C face serum that brightens skin, reduces dullness, evens skin tone & reduces sun damage |

## 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

![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 - 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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**Shop now:** [https://www.desertcart.co.ke/products/509578356-cos-iq-20-vitamin-c-serum-30ml-with-vitamin-e](https://www.desertcart.co.ke/products/509578356-cos-iq-20-vitamin-c-serum-30ml-with-vitamin-e)

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*Product available on Desertcart Kenya*
*Store origin: KE*
*Last updated: 2026-03-12*