A bang on the head !
yes, and no suger can be harmful but you would have to eat A LOT of it.
alchoholic
Learning is not harmful to your brain, no matter how stupid you may want to be!
brain
Because it has a blood brain barrier (BBB) which protects the brain from toxins or harmful substances.
Yes, tapeworms are harmful to animals. They absorb nutrition that would normally help the animal survive, and they also in rarer cases can cause obstructions and even neurological problems if they migrate to the brain.
a negitive one
Brain
No there quiet good for your brain and so is gum
Some of the harmful substances that can affect our brain are cigarettes, illegal drugs, marijuana, weeds , shaboo or methamphetamine...and others ..Hope it will Help you. :))
harmful affects of lead are that it causes headache ,cancer and in last brain damage
No, not at all. But it may be harmful to your job if your boss catches you doing it at work.