Robert Lustig has been preaching this for years:

https://www.amazon.com/Metabolical-Processed-Nutrition-Moder...

A good rule of thumb if you care about avoiding UPFs but don't want to overly limit your diet is to only buy foods with 5 ingredients in them (plus or minus 2 :).

https://www.amazon.com/Metabolical-Processed-Nutrition-Moder... p. 39-42

"the kidney is very adept at excreting excess sodium. But there’s one thing that inhibits sodium excretion by the kidney—insulin resistance. High insulin levels increase blood pressure, even with relatively low sodium intake. And many people are insulin resistant—and those people do need to lower their salt as a treatment of the disease."