human saliva is not poisonous
Iron is the least poisonous to human beings.
Yes, it was used as a poisonous gas in World War I.
Thallium is known to cause hair loss.
They should be, but be cautious. Some companies do advertise human hair, but it's human hair blend or human hair mixed with animal hair.
Humans are not poisonous.
yes
yes
no but it can cause infection
Black and brown fuzzy caterpillars are not poisonous. Most poisonous species of caterpillar are very colorful and easily spotted.
not really towards humans
Most centipedes are not poisonous. Very few are. There are no poisonous centipedes in North America.