Thuy shared this product with me to try. Gave me very clear instructions on the step-by-step use of each product in the Purecell Exline. I started using this while on a business trip in Las Vegas hoping it would help keep my skin hydrated in the dry conditions. It did way more than that and I saw results within 2 days. My skin never got dry and flaky, which of course is great but, other effects were brighter, more luminous skin, reduction in discoloration from blemishes and reduction in melasma spots. I am definitely convinced it is effective and will be buying more when my current supply runs out.