Excess dietary salt is most notorious for increasing blood pressure. Americans have a 90 percent lifetime probability of developing high blood pressure - so even if your blood pressure is normal now, if you continue to eat the typical American diet, you will be at risk.
Excess body fat alters the levels of the hormones insulin, leptin, and estrogen, and these factors are believed to be responsible for the acceleration of pubertal timing by obesity.
High salt intake is a risk factor for osteoporosis because excess dietary sodium promotes urinary calcium loss, leading to calcium loss from bone and therefore decreased bone density.