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I believe that with the new salt and pepper shakers, the salt shaker is the one with 3 holes, while the pepper goes in the one with 2 holes. Salt is used more than pepper anyway. Pepper should only ever be fresh ground at the table, meaning salt shakers win out.
Table salt, with 2,300 milligrams of sodium per teaspoon, contributes to your overall intake; however, the salt shaker isn't responsible for the excessive amounts of sodium in the American diet. About 75 percent of the sodium you get comes from what's been added to processed and restaurant foods, according to the AHA.