Forget the whitestrips… there’s photoshop.
Whitening teeth in Photoshop is easier than you think. Here’s how to quickly make those pearly whites shine, and make it look natural.
Step 1: Select teeth with magic wand tool, make sure you click on “add to selection” at the top so that you can select multiple teeth.
Step 2: Go to Select > Modify > Feather. Change the feather radius to .5 or 1. This will make the edges of the selected area not as rough. Click OK.
Step 3: Go to Layer > New Adjustment Layer > Curves. A box will appear. Move the line from being straight, to an upwards shaped curve. A small adjustment goes a long way here, so be careful to not overdo it.