Negative effects of Deuterium

Studies on deuterium and heavy water
showed that these have negative effects on the immune system: a raised quantity of deuterium in the organism reduces the number of leukocytes in the blood and weakens the organism’s response capacity to disturbances.
Higher concentrations of heavy water kills fish, amphibians and insects.
Experiments conducted on rodents
showed that a high level of deuterium of as much as 25% in the body water causes sterility, because neither the gametes nor the zygotes can develop.
Small mammals such as rodents die after approximately a week of consuming heavy water. The cause of death is similar to that of cytotoxic poisoning (the case of chemotherapy) or acute radiation syndrome.