My dermatologist recommended that I️ start this product. I️ have been using this product for about 3 weeks, and my face is really starting to glow from within! I️ apply to my face right after I️ wash my face, and I️ wait for it to absorb to apply my moisturizer. It works well and does not irritate my sensitive skin!!! While pretty expensive, this is the best product to have added to my regimen as I️ approach my 40th birthday!