Mayor Michael R. Bloomberg, in the midst of a long-running campaign to change the eating habits of New Yorkers and consumers across the country, declared a victory against salt on Monday, as 21 companies, from Kraft and Goya to FreshDirect, said they had met the first stage in reductions in salt content in foods.
After focusing on reducing trans fats and smoking, Mr. Bloomberg turned his attention to salt in 2010, announcing that about 30 companies had signed up to reduce salt in foods by 25 percent within five years, as a way of lowering consumers’ blood pressure and saving lives lost to heart attack and stroke.
“These companies have a huge presence on our shelves and in our diets,” Mr. Bloomberg said at a news conference at City Hall as he announced the results, surrounded by a half-dozen executives of food companies.
The first stage focused on the low-hanging fruit — salsa, dips, bacon, ketchup, barbecue sauce, cold cuts, processed cheese, salad dressing, canned beans and pizza — foods whose salt content is so high that reducing it up to a point probably would not be noticed by many consumers.
Mr. Bloomberg called them “some of America’s most beloved and iconic foods,” suggesting that the cuts might have a disproportionately salutary effect. But Dr. Thomas A. Farley, the city’s health commissioner, said he did not know how much salt the results so far had removed from the average person’s diet.
One side effect of the salt reduction drive is that food companies are looking for salt substitutes to make food taste better.
The main way to do that is to add potassium chloride instead of sodium chloride, said Russ Moroz, vice president for research at Kraft Foods. But because potassium tends to have a bitter, mineral taste, other ingredients have to be added. He said these were proprietary secrets, and he declined to name them.
Potassium is good, Dr. Farley said, because it lowers blood pressure and most people do not get enough of it. It is removed from fruits and vegetable during processing, he said. Mr. Bloomberg said he thought fears of additives were overdone.
But a salt industry scientist said Monday that too much potassium could be bad for the kidneys, and that the “cocktail of chemical constituents” added to balance the bitterness and enhance the salty taste could present unknown risks, as those ingredients were undisclosed.
“They do it with one eye on the lab and the other eye on the label,” said Morton Satin, vice president for science and research at the Salt Institute, a trade association. “They make sure it’s below the level that the F.D.A. requires for it to be on the label.”
Mr. Satin said that the link between high blood pressure and salt was just “a theory,” and that reducing salt too much could have harmful effects, like iodine deficiency in children, a cause of mental retardation, and diabetes.
Some companies said reducing salt proved to be a popular marketing tool. Goya reported that it had reduced salt in its regular canned beans by 5 or 6 percent, without any drop in sales. “We tasted them, and you really wouldn’t notice the difference,” Joseph Perez, senior vice president of Goya Foods, said Monday.
Mr. Bloomberg said it might surprise many people to know that bread and rolls were the “biggest contributor” to salt in the diet. Eating a muffin, he said, could be worse than eating a small bag of Lays potato chips.
Bread makers are hard to spot on the list of companies that have pledged to reduce salt, perhaps, Mr. Satin said, because it is more difficult to make bread without salt. However, some companies, like Au Bon Pain, have reduced salt in some baked goods.
On an irreverent note, Mr. Bloomberg said that he loved Subway sandwiches and would eat his favorite, the Italian B.M.T. — it includes salami, pepperoni and ham — regardless of the salt content, but that he was glad that it now contained 27 percent less.
