https://www.verywellhealth.com/lead-poisoning-overview-4135957
&
https://www.poison.org/articles/dangerous-household-hydrocarbons

Symptoms of Lead Poisoning

• Irritability
• Fatigue
• Headaches
• Loss of concentration
• Deficits in short-term memory
• Dizziness and loss of coordination
• Unusual taste in the mouth
• A blue line along the gum (known as the Burton line)
• Tingling or numb sensations (neuropathy)
• Abdominal pain
• Decreased appetite
• Nausea and vomiting
• Diarrhea or constipation
• Slurred speech

consistently, blatantly obvious?