The assumption I am making is that this is a nutritional question. Zinc is used as a nutritional supplement and is water soluble.
Calcium is water soluble, but not fat soluble. It is the fifth most dissolved ion in seawater. On the other hand, fat is soluble into calcium in the body. The calcium will extract the fat from food...
Pure iron is insoluble in both.
minerals are usually water soluble
fat soluble vitamins are stored in our fat tissues and water soluble vitamins are soluble in water.
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