Anything distilled may contain methanol.
Mushrooms can be a different type than what’s on the label.
Fermented products may contain poisons from dangerous bacteria. If you’ve heard about entire churches full of people dying in South America from bad food, it most likely fermented corn.
Expired food products may be contaminated with bacteria. (Unless they canned, jarred, or too dry Etc.)
Fresh apples may contain enough pesticide to make you sick. Wipe them off with a paper towel before use if you’re not peeling them.
* Suldenafil or tadalafil (ED medication)
* SARMS (steroids in general)
* Caffeine powder (another game of guess the dosage)
I found a study saying "the caffeine content in tested dietary supplements is 4–35% higher than the declared amount in most cases" which doesn't seem very dangerous.
You can overdose on caffeine in other ways, of course.
- Sand (inhaled)
- Air (intravenous)
- Blood thinners or rat poison