No. However the body has nicotinic receptors in nerve cells- places where nicotine binds to cause it's psychoactive effects. These receptors are probably also activated by substances created by the body which have a structure very similar to nicotine- it's not as though we'd evolve to all have a very special receptor created for the sole purpose of responding to a drug!
Plutonium was first produced in 1940 and identified from atoms resulting from human activity. In 1971, it was identified as naturally occurring in trace amounts.
Propofol is not a naturally occurring substance in the human body.
The human body is naturally radioactive. The potassium found in the bodies of humans is the main cause of the radioactivity.
No
Pheromones are naturally excreted chemicals by both humans and animals that cause a response by others of the species. The most widely known are those related to attracting the opposite sex but may others are produced.
No
One drop can kill a grown man. When you take in small amounts at a time (for example in smoking), it becomes addicting. If you intake too much you will die.
The human body cannot produce mdma. however mdma releases seratonin which is why you experience the "high" and your body can produce too much seratonin. I hope my answer helped. If not do some research about seratonin and see what you can find out.
Plutonium was first produced in 1940 and identified from atoms resulting from human activity. In 1971, it was identified as naturally occurring in trace amounts.
Don't smoke for a very long time. OR Q Carbo32
Propofol is not a naturally occurring substance in the human body.
Chemical Receptors
NO.
Not naturally.
Yes it is possible but not practical.
Oxygen is a gas that does not naturally replenish itself in the atmosphere and requires the work of photosynthesizing plants to replenish it. Humans breath oxygen that plants produce and the plants breathe the carbon dioxide that humans produce.
This is a way to produce large amounts of the antibodies and hormones cheaply without legal recourse