- Marijuana users found to have lead in their blood and urine NBC News
- Marijuana users have elevated levels of heavy metals in their blood, urine: study The Hill
- Marijuana Users Found to Have Elevated Lead Levels Neuroscience News
- Marijuana users have more heavy metals in their bodies CNN
- Marijuana Smokers Have Higher Levels Of Toxic Metals In Tests, Study Suggests Forbes
Source: Marijuana users found to have lead in their blood and urine – NBC News
