Late 1920s? Well, so much for that recent little tidbit in Downton Abbey when Baxter, the new lady's maid to Cora, put a glass of orange juice on her breakfast tray, with the comment that Americans like orange juice. The time period for Downton is, right now, early 1920s.
edited to add. okay, after responding to the late 1920s item in the BB post, I clicked through and read this:
McCollum became the unofficial nutritionist of the nation beginning in the early 1920’s when he heavily promoted the life-extending and healing capabilities of vitamins