Indirectly of course. There are other factors too, such as regulations which make it illegal to sell un-pasteurized milk, horse meat, foie gras, etc., but the biggest factor influencing what the average American eats is the margin the grocery store makes on the products it sells. This explains why you can't get redcurrants or passion fruits anymore, but you'll find plenty of high energy drinks and food rich in sugar (corn starch). Of course there's a feedback loop: Americans like sweet stuff, so many companies produce sweet food, due to large scale processing it's cheap, can be priced efficiently by grocery stores, and sell well.
Behind all of this is data science, which helps answer the following questions:
The last time I went to a grocery store, I wanted to buy plain, non sweet yoghurt. It took me 10 minutes to find the only container left in the store - the brand was Danone. I'm ready to pay three times more to get that yoghurt (a product that has been consumed worldwide by billions of people over several millenia) rather than the two alternatives: low fat, or plain but sweet. Ironically, the "low fat" version has 180 calories per serving while the old-fashioned plain yoghurt has 150. This is because they added corn starch to the low fat product.
Over time, I've seen the number of product offerings shrink. More old products are eliminated than new products being introduced. And clearly, the products eliminated are those with a smaller market, such as passion fruits. But could data science do a better job at deciding what goes on the shelves, when and where, in what proportions, and at what price?
I believe the answer is yes. Better, more granular segmentation, with lower variance in forecasted sales and revenue (per product) thanks to using models with higher predictive power, is the solution. In the case of the yoghurt, while most people avoid fat, there are plenty of thin people on the West and East coast who don't mind eating plain yoghurt. So it could make sense to not selling plain yoghurt in Kansas City, but selling it in Seattle. Maybe just a few containers with a high price tag, among tons of cheap low fat yoghurt.
It also creates new opportunities for grocery stores like PCC, selling precisely what supermarkets have stopped selling - as long as it is sellable. In short, selling stuff that generates profit but that supermarkets, due to poor retail analytics, have written off.