The rest is absorbed into the blood and then into the tissues throughout the body. Therefore, we do not always know the chemical form of cobalt to which a person may be exposed.
However, too high concentrations of cobalt may damage human health. The element has a medium abundance but natural compounds of cobalt are numerous and small amounts of cobalt compounds are found in most rocks, soils, plants, and animals.
Studies in animals have suggested that children may absorb more cobalt from foods and liquids containing cobalt than adults. It may enter air and water, and settle on land from windblown dust, seawater spray, volcanic eruptions, and forest fires and may additionally get into surface water from runoff and leaching when rainwater washes through soil and rock containing cobalt.
If cobalt is presence on the skin in can lead to an irritation and rash. This complex was first isolated by Werner as yellow-gold needle-like crystals. Different units are used to measure the rate of emission from a radioactive source, the energy that is absorbed from the source, and the amount of damage the absorbed radiation does.
All isotopes of cobalt behave the same chemically and will therefore have the same chemical behavior in the environment and the same chemical effects on your body.
Levels of cobalt normally found in the environment, however, are not high enough to result in excess amounts of cobalt in food or water.