Some marijuana users may have elevated levels of lead and cadmium — two heavy metals linked to long-term health issues — in their blood and urine, a new study shows. Among a group of more than 7,200 ...

A study has found that marijuana users have elevated levels of heavy metals in their blood and urine compared to those who do not use marijuana. The study, published Wednesday in the Environmental ...

A Columbia University study found significant levels of metals in the blood and urine among cannabis users. The study suggests that chronic cannabis consumption may be a primary source of lead and ...

Blood appearing in urine creates immediate concern for most people, and rightfully so. This alarming symptom, medically termed hematuria, serves as the body’s warning system that something requires ...