5. Cancer
The link between salt and cancer are a bit tenuous, but it exists. Higher intakes of salt /sodium / salty food are linked to stomach cancer.
Whether it is salt or a generally unhealthy diet low in fruit and vegetables is unclear. However, people who eat more salt/salty foods tend to have higher levels of H. pylori, a bacterium that is linked to stomach cancer.
Salt is also linked to obesity and obesity to cancer. Decreasing salt could lower cancer risk.