Is arsenic poison medically traceable or untraceable?

Tests are available to diagnose poisoning by measuring arsenic in blood, urine, hair, and fingernails. The urine test is the most reliable test for arsenic exposure within the last few days. Urine testing needs to be done within 24–48 hours for an accurate analysis of an acute exposure. read more

"Botulism" is the term for botox poisoning -- it's a fairly nasty form of food poisoning caused by eating contaminated food. The botox itself is destroyed by heat, but the spores that *produce* the botox are not, which is why you're not supposed to reheat cooked rice. read more

If arsenic poisoning occurs over a brief period of time symptoms may include vomiting, abdominal pain, encephalopathy, and watery diarrhea that contains blood. Long-term exposure can result in thickening of the skin, darker skin, abdominal pain, diarrhea, heart disease, numbness, and cancer. read more

Biological poisons can also usually be detected fairly easily, and tests for a few common ones are routinely conducted on people who have died in suspicious circumstances. So the trick would be to either use a very rare poison, or make the circumstances seem less suspicious. read more

Elements like arsenic, uranium, vanadium, zinc or copper can be deadly in the right dosages, but are fairly easy to detect -- even after a body's been cremated! Biological poisons can also usually be detected fairly easily, and tests for a few common ones are routinely conducted on people who have died in suspicious circumstances. read more