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How fast will I begin to see visible results?
How long does C How long will C Refiner Vitamin C Brightening Serum last on my skin?
Can I use C Refiner Vitamin C Brightening Serum with prescription topical treatments?
Do I have to avoid the sun when using C Refiner Vitamin C Brightening Serum?
My skin is sensitive, is C Refiner Vitamin C Brightening Serum too strong for me?
What should I do if I experience other negative reactions such as redness, irritation, or burning?