According to a recent report on the global burden of disease published in the journal The Lancet, poor diet generates more disease than physical inactivity, alcohol, and smoking combined!

The Lancet: Globally, 1 in 5 deaths are associated with poor diet
Globally, one in five deaths are associated with poor diet
It is time to bust the myth of physical inactivity and obesity: you cannot outrun a bad diet 

Though no healthy upper limit of protein consumption has yet been identified, the National Academy of Medicine in the United States recommends a minimum of 60 grams of protein per day for the average adult female and 71 grams for the average adult male.

Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids

Sodium is an essential nutrient, and recent studies have shown that the present recommended amounts—between 1,500 and 2,300 milligrams per day for younger adults, and even lower for those over the age of 50 or under the age of 8—are insufficient and might be negatively affecting our health.

Urinary sodium excretion, blood pressure, cardiovascular disease, and mortality: a community-level prospective epidemiological cohort study
Decades of Warnings About Our Salt Intake Might Have Been Wrong
Pass the salt: Study finds average consumption safe for heart health
Pass the salt: Study finds average consumption safe for heart health

According to Connie Weaver of Purdue University, the average American only gets about half of the potassium they need, and only 3 percent of people meet the minimum daily requirements.

What Is the Evidence Base for a Potassium Requirement?
Retention of Potassium From Potatoes and Potassium Gluconate, and the Effect on Blood Pressure.

Studies have shown that a single salt bath can increase blood magnesium levels by about 10 percent, which increases to 40 percent if repeated daily for a week.

Report on Absorption of magnesium sulfate (Epsom salts) across the skin
Myth or Reality—Transdermal Magnesium? – NCBI

Adults need about 1,300 milligrams of calcium per day, so if you don’t think you’re getting enough—and recent studies indicate that only half of us are—consider taking a calcium supplement.

Micronutrient Inadequacies in the US Population: an Overview
Americans still may not be getting enough calcium
Osteoporosis: Prevention With Calcium Treatment