Sodium is an essential nutrient the body needs — but only in small amounts. The problem is in the typical American diet, there’s no shortage of it, and it doesn’t just raise your blood pressure. It may be the missing link that explains why stomach cancer rates are on the rise.

While stomach cancer is only the sixth most common type of cancer worldwide, it’s the third most common cause of cancer death. Because it’s so dangerous, it’s important to know the signs, risks and best prevention…