Immune system, cadmium toxicity

Not only arsenic, cadmium, lead, mercury, nickel, aluminum, molybdenum, and bromine, but also zinc, copper and selenium are uniformly toxic to the immune system, although the ultimate effect depends on the species of animals studied and the route and mode of administration. An important feature of inorganic toxicity is the observation that in animals, some metals affect the immune system at doses that are unaccompanied by other clinical manifestations of toxicity. A similar effect also occurs in man (Chowdhury and Chandra 1991)... 

But some chemicals are bad actors they pose serious risks to human health and the environment. Lead, cadmium, DDT, CFCs, and PCBs are examples of hazardous chemicals that should not be in products. Chemicals that persist, bioaccumulate, and are toxic are dusted across the globe. The vast majority, if not all, humans and mammals, are contaminated with human-made chemicals. Literally, there is no human control group—every person on the planet carries industrial chemicals that were not present 100 years ago. Some of these chemicals have the potential to cause cancer or adverse effects to the brain, normal development, or the endocrine, reproductive, or immune system. The result is a vast chemical experiment with unknown consequences. 

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