Major Minerals
Major minerals are the minerals the body requires in relatively larger amounts — and in several cases, they make up significant structural components of the body itself. Calcium and phosphorus are the primary building materials of bone and teeth. Sodium, potassium, and chloride govern fluid balance and nerve signaling. Magnesium is involved in hundreds of enzymatic processes. Sulfur is a structural component of proteins and connective tissue. Together they account for most of the mineral mass in the human body.
The word “major” refers to quantity required, not importance relative to trace minerals. Both categories are essential. The distinction is simply that major minerals are needed in amounts measured in hundreds of milligrams to grams per day, while trace minerals are needed in much smaller quantities.
What makes major minerals worth understanding as a group is that several of them work in relationship with each other. Calcium and phosphorus are tightly linked in bone metabolism. Sodium and potassium work in opposition to regulate fluid balance — when one goes up, the other tends to go down, and the ratio between them matters for blood pressure and cardiovascular health over time. Magnesium is involved in the metabolism of both calcium and potassium and affects how well the body uses them. These aren’t isolated nutrients with isolated functions. They operate as a system.
The practical gaps in most people’s diets tend to fall in the same places. Magnesium and potassium are consistently under-consumed. Calcium is adequate for people eating dairy but worth attention for those who don’t. Sodium is almost universally over-consumed through processed food. The individual pages in this section cover each one in detail.
Reference Card
Pillar: Nourish Category: Major Minerals
The seven major minerals Calcium · Phosphorus · Magnesium · Sodium · Potassium · Chloride · Sulfur
What sets them apart
- Required in larger amounts than trace minerals — hundreds of milligrams to grams per day
- Several serve structural roles in the body — calcium and phosphorus in bone, sulfur in proteins and connective tissue
- Several work in relationship with each other — sodium and potassium, calcium and magnesium, phosphorus and calcium
Where the common gaps are
- Under-consumed — magnesium, potassium, calcium for people not eating dairy
- Over-consumed — sodium, primarily through processed and packaged foods
Considerations
- Mineral balance matters as much as individual intake — the ratio of sodium to potassium has more relevance for blood pressure than sodium alone
- Whole food sources generally provide minerals in forms and ratios the body handles well
- Processing strips minerals from food — refined grains, for example, lose a significant portion of their magnesium content compared to whole grain versions
Common myths
- Getting enough calcium means your bones are taken care of — bone health involves calcium, phosphorus, magnesium, vitamin D, vitamin K, and physical loading through exercise; calcium alone is one piece of a larger picture
- Sodium is the only mineral to watch for cardiovascular health — the sodium to potassium ratio is more predictive of cardiovascular outcomes than sodium intake in isolation