face serum might not work the best . instead try moisturizing the skin with aleo vera gel, coco butter, vitamin c rich moisturizers . also keep yourself hydrated and eat healthy . add berries, citrus fruits, nuts, seeds, green leafy vegetables in your dite. they provide necessary nutrients and improve skin health

You need to follow a good and healthy lifestyle. Have healthy diet. Have plenty of liquids. Try to workout. You can use vitamin c in skincare. It will help. I have been using Anveya vitamin c serum from past 3 months and it's working good.