Heavy metals are higher in marijuana users.

Lead author Tiffany Sanchez, an associate professor of environmental health

Sanchez claimed marijuana users had 22% higher blood and 18% higher urine cadmium levels than non-users.

Urinary cadmium is a measure of total body load, how much you've taken in over time.

The EPA prohibits cadmium in air, water, and food because it is connected to kidney

“I think this highlights the need for more detailed studies on cannabis, particularly

 medicine and co-director of the residency investigation methods and epidemiology program. She was not studied.

The research, published Wednesday in Environmental Health Perspectives,

we can't determine if medical cannabis users had greater metal levels,” she added. 

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