- Marijuana users have elevated levels of cadmium and lead in their blood and urine News-Medical.Net
- Warning: Columbia University Uncovers High Metal Levels in Blood of Marijuana Users SciTechDaily
- Marijuana users have higher levels of heavy metals in blood: study New York Post
- Heavy Metals in Marijuana: What Users Need to Know One Green Planet
- Scientists Find That Weed Is Leaving Heavy Metals in Your Body Futurism
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