Answer:
if I drink I die if I eat I am fine what am i
What is used by man, tossed by trees, everywhere but unseen?
What has a head and a tail but no body?
A tiny bead, like fragile glass, strung along a cord of grass.
What pulls you down and never lets go?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?