The nutrition facts label on a food package lists the following: iron 50%. what does this figure indicate?

Half the nutrition is composed of the mineral iron

Yes, this is very true. specifically causing damage in the  dentrite. 

Personality is a mixture of characteristics/qualities that form an individual's distinctive persona. it can be influenced by environmental and biological factors; one's culture is a most important factor that shape personality. extreme mood swings, unstable relationships, distorted self-image, impulsive/risky behavior, explosive anger, chronic feelings of sadness/emptiness, etc. these could indicate that someone could have a personality disorder.