Avene A-Oxitive Antioxidant Defense Serum, Vitamin C & E, Hyaluronic Acid, Free Radical Protection, 1 Oz

how does it work with oily acne prone skin with redness on cheeks?

What percentage of vitamin c does this serum contain? (if you aren't sure, please don't respond. thanks!)

Would this work well for both red and oily skin types?

I want to use this in the mornings. Do you still need an additional moisturizer, or this does the job? I use the retin__ stuff at night