Copper is an essential trace element. An adult contains around 100-150 micrograms of copper. Most of it is found in the liver, brain, kidneys, and heart. Fetuses and newborn babies have particularly high copper levels in their liver. In fact, the liver is believed to serve as an extra storage facility during lactation where the copper content in breastmilk is rather low.

An increasing number of people have started using magnesium supplements against migraine attacks and headaches. Even physicians acknowledge that this mineral may actually have great potential.

An adult contains around 150 grams of potassium with 98% inside the cells. Potassium works in synergy with sodium, which is primarily found outside the cells in the tissue fluids. The potassium-sodium distribution is essential for the so-called electrolyte balance of cells, and this is crucial for the cellular uptake of nutrients, for the ability of cells to get rid of waste products, and for the maintenance of essential fluid balances. The kidneys regulate the body's potassium levels and they must always be in balance with sodium. A major sodium source is table salt (sodium chloride). Excessive consumption of sodium may result in a potassium deficiency.