Sometimes advertisers use pictures to entice you to purchase their products, especially skin creams that produce unbelievable results. Often these images are stolen from legitimate companies. To see if the image has been used elsewhere you can do a simple Google search.
Right click on the online image and select copy the image URL or Copy Image Address
Select Google Images (Images.Google.com)
Click on the camera next to the search box
and insert the URL address
Only one match showed for the post on my blog, but searching for another image online with a before and after face picture brought up millions of results advertising face serum, mascara and a slew of other products.
Insert a watermark on each of them before posting.