Whether it's a new workout routine, hair conditioning treatment, or anti-aging cream, it will take time before you begin to see any results. Especially with skin products, where appearance is our key factor in determining their success or failure, we often expect them to work magic within days or even hours of their first use; when they don't, we want to give up and go right back to the store or doctor to get something else. But be patient! It takes about 21 days for a new skin cell to be made and travel to the visible surface of your skin, so you'll need to wait at least that long before you begin to see real results in the mirror.