Trace minerals are normally recycled so they only required in tiny amounts, but if the kidneys become hyperactive, vital minerals can be lost. Of course, deficiencies also occur because of the lower quality of food grown in depleted soil. Some minerals are essential so supplements can be used to compensate for loss or deficiency. The best supplements are the ones that include all the minerals that are natural. These can come from pristine areas of the Planet, fossilized sea vegetables, or sometimes from volcanic ash.