This serum glides smoothly on the skin and is much better than sticky creams. It will work best for beginners because it is not too harsh and is easy to apply.

If you're looking for a Vitamin C serum for brightening & hydration, Cos-IQ Vitamin C serum could be a good option as it brightens skin and reduces blemishes and fine lines a...Read More

⭐️⭐️⭐️⭐️⭐️ Instant Glow! Light on the skin and gives a fresh, radiant glow. Absorbs quickly and brightens my face beautifully. Love it.!

It cleanses exfoliate treat moisturize and the best part is SPF, for bright and glowing skin😍😍

I have been using this serum daily, and I absolutely love it! It's become my go-to for morning skincare. A good purchase, and I highly recommend it.

I always experienced breakouts when I used vitamin C, but this is actually different. It didn't purge my skin and was gentle. I used it for 4 days, and I can actually notice ...Read More

This serum gives skin a natural glow and helps lighten dark spots. The texture is very lightweight and gets easily absorbed by the skin without stickiness. I felt a differenc...Read More

I’ve been using the COSIQ Vitamin CEF-10 Face Serum and the results are amazing! It brightens my skin beautifully and has noticeably reduced my dark spots and pigmentation. ...Read More

It's super lightweight and doesn't feel sticky. My skin looks brighter.

Very nice serum, I tried it today and had very good results with the first application. Worth buying.

This serum applies really easily and feels light on the skin. It isn’t sticky at all, and the formula is gentle enough for beginners who want something simple and non-harsh. ...Read More

This serum feels super lightweight, absorbs quickly, and gives my skin a fresh glow without making it oily. Perfect for daily use!

I'll Definitely suggest this because it is quite simple to put on and non greasy formula.

Brightens skin and fades dark spots fast. Lightweight, hydrating, and non-greasy. Airless pump keeps formula potent.

I love the smell of the product, it stay up to 12 hours, you feel like fresh I loved the product, it is totally worthy.

Airless pump, vit C works best with vit E & F, showed immediate results, skin looks fresh and young from first few uses.

Glowing face awesome serum .

Preserves the ingredients from oxidation because of the excellent packaging. It’s very watery but a small amount goes a long way, very easily spreadable.

I found this vitamin C serum brightening and refreshing for my skin. It absorbs fast and feels light and smooth.

It gave my skin a beautiful glow, helped reduce blemishes, and provided great hydration. Overall, it's an amazing product, and I absolutely loved it.