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

Amazing Vitamin C Serum!I’ve been using this CosIQ Vitamin CEF-20% Face Serum for a few weeks and the results are impressive! My skin feels brighter, more hydrated, and visibly smooth. It has reduced dark spots and fine lines, giving my face a healthy glow. The formula is lightweight, non-sticky, and absorbs quickly into the skin. Perfect for daily use, and the packaging is travel-friendly too. Highly recommended for anyone looking to improve skin texture and brightness.

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!

This Vitamin C serum is very lightweight, absorbs quickly, and leaves no sticky residue. Its Great value for the price and perfect for daily use. It's a must recommend product to everyone and it's a great product that you can add to your daily skincare routine for good and brightening skin tone. Loved the product.

My skin is oily sensitive and acne prone. This face serum is like wow. I can see visible results in just 10 days use. It gives a glow and also reduce dark spots a little. Hope better in long term use.Worth purchase, go for it

Worst Product no changes in my skin even my skin get more worse after using this product and my skin gets more oily after using it don't buy it.

I use over a week. Now glowing my scene.so moisturised, lightweight.now my screen is so soft.smell also nice .

What I like:1. it doesn't make my oily skin any oilier2. Airless pump packaging3. usage of ethyl ascorbic acid which is both water n fat soluble4. I have been using it for a month now and it works wellWhat could be improved:1. Plz include the % of niacinamide in the ingredient list , as some of us are allergic to it , at above 2% strength .2. Plz include the pH of ur products on the packaging, as it wud make layering, daytime vs nighttime usage easier to determine.Update: 1. Leakage of product- The pump packaging does not work well and additional product seeps out from the sides everytime I use the pump. I have noticed the same issue with their other products, which use the same packaging.2. Product gets oxidised, changes colour and loses efficacy about 3 months after opening it. So store it in d fridge if u want it to last longer.3. Due to point 1 , I am reducing my rating to 3 stars now.

I’ve been using this serum daily for a few weeks and the glow it brings is impressive! The lightweight, non-sticky gel absorbs easily and doesn't feel heavy on the skin.It’s suitable for all skin types—even sensitive ones—and the gentle tingling felt on application is totally normal. Pairing it with sunscreen has helped prevent sun spots and further photo‑damage .