Is the answer Tryptophan?
(Do I get a prize?)
That's totally fucking hilarious!
Is it just me, or is that graph on a slow downward trend?
Indeed, Alicia! Brad, I have no explanation for the downward trend, but an optimist might suggest the American public is gradually learning at least one of its amino acids. :)
By the way, I had another comment on Facebook that this could be the trend for "turkey." It's not; "turkey" also peaks (much lower) at Christmas. I assume that's from novelty-seeking (or lazy) cooks who Google a recipe each time they prepare, or maybe from hosts who didn't cook at Thanksgiving, and need to Google a recipe for Christmas.
The Google trendline shows that "Tryptophan" is definitely ephemeral.
The baseline seems to be on a downward trend, but the Thanksgiving spikes might be on a three-year cycle. Maybe people are using Trytophan less now than five years ago?
I notice a smaller pre-spike, which I assume correlates with the Canadian holiday.
Heh. I had guessed "the war on christmas".