In the early 1950s Upjohn produced a series of thin cardboard cutouts for different foods. The first photo below shows the series of them. When you opened up each food there were facts about that food and what it was lacking that Unicap could provide. There are three examples of these Unicap comparisons shown below. These cutouts are in the collection of Joe Timko.

Here is some further Unicap advertising from the 1950s.