I have heard this claim surface many times before, however, I believe when to wash your face and when not to wash your face entirely depends on an individuals skin type. Personally, the once a day face washing technique is not beneficial for my skin type, but I could see how it might work for others. I found the Vogue article did bring up several strong points, such as when they stated that "Cleansing your skin in the morning removes the delicate layer of sebum that your skin produces overnight to protect itself from external factors, like pollutants or bad bacteria.” However, since Vogue Magazine tends to lean more towards fashion, pop culture, lifestyle, etc., it would have been great to further back up the claim using an additional, more scientific source. It would add more credibility to the original claim made and increase the specificity.