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โจ Glow like you mean it โ because your skin deserves the spotlight!
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%, itโs a lightweight, fast-absorbing solution designed for all skin types to achieve radiant, youthful skin in just 30 days.






























| 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 | #10,302 in Beauty ( See Top 100 in Beauty ) #317 in Serums |
| Brand | COS-IQ |
| Country of Origin | India |
| Customer Reviews | 4.0 out of 5 stars 381 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 | Cos-IQยฎ, R.I. Ayurveda Research Labs, Dilshad Garden Industrial Area, G.T. Road, Delhi 110095 |
| Manufacturer Contact Information | R.I. Ayurveda Research Labs, Dilshad Garden Industrial Area, G.T. Road, Delhi 110095 |
| Manufacturer Part Number | CEF20 |
| Material Features | Natural |
| Material Type Free | (MEA/DEA/TEA), Silicones, Mineral Oils Free, Paraben Free, Phthalate Free, Sodium Lauryl Sulfate Free, Sulfate Free |
| Model Number | CEF20 |
| 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: [email protected] |
| 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 |
M**I
Removed dull skin
The best vitamin c serum , removed my full skin and tan . And spot reduction
V**T
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 โ it's gentle but effective. Overall, a great product if you're looking for brighter, healthier-looking skin. Definitely worth trying!
L**A
Happy
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.
S**Y
Worst
Worst ever serum got rashes and itching
R**A
Cos-IQ 20% Vitamin C Serum
This product is lightweight and easy to use.All tone skin .and quality is fabulous.no skin irritation.buy it
K**R
Sticky for oily. Skin
Not great
A**I
Glowing skin
It gives a nice healthy glow and works well under moisturize . I also liked the pump packaging as it feels hygienic and easy to use.
V**I
20% Vitamin C by Cosiq
Surprisingly works wonders on all skin types. I have oily skin and i use it everyday before sunscreen and my mom has dry skin she uses it too it has helped so much with my acne marks and her pigmentation. Skin becomes radiant. Must have. Watery texture.
Trustpilot
1 month ago
2 days ago