Answer:
I am commonly abbreviated to H
I am a food with 5 letters. If you remove the first letter I am a form of energy. Remove two and I'm needed to live. Scramble the last 3 and you can drink me down.
You buy me to eat, but never eat me. What am I?
With pointed fangs I sit and wait; with piercing force I crunch out fate; grabbing victims, proclaiming might; physically joining with a single bite. What am I?
I may be made of metal bone or wood and have many teeth. My bite hurts no one and the ladies love me.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?