Concepts:

1.-Steroid: Steroid any of a large group of fat-soluble organic compounds, as the sterols, bile acids, and sex hormones, most of which have specificphysiological action.
http://dictionary.reference.com/browse/steroid?s=t

I have seen many teachers trying to sell steroids at the school gym.

2.-Purging:o rid of whatever is impure or undesirable; cleanse; purify.
http://dictionary.reference.com/browse/purging?s=t

She has been purged because she is sick


3.Binge:a period or bout, usually brief, of excessive indulgence, as in eating,drinking alcoholic beverages, etc.; spree.
http://dictionary.reference.com/browse/binge

I know only one person that is binge drinking

4.- Obesity:  the condition of being very fat or overweight; corpulence:
http://dictionary.reference.com/browse/obesity?s=t

I have never seen a babe with problems of obesity

5.- Anorexia: loss of appetite and inability to eat.
http://dictionary.reference.com/browse/anorexia?s=t

I have been anorexic the last two years

6.Bulimia: Also called hyperphagia. Pathology. abnormally voracious appetite orunnaturally constant hunger.
http://dictionary.reference.com/browse/bulimia?s=t

I have been selling pills for bulimia

7.-Manorexia: A condition in which a man is obsessed with his body image and musculature, such that he constantly lifts weights, uses dietary supplements andanabolic steroids, resulting in—in the extreme case—an overly developed body   
http://dictionary.reference.com/misspelling?term=manorexia&s=ts

I haven`t finished mi homework of manorexia yet

8..- Bigorexia: muscle dysmorphia.
http://dictionary.reference.com/browse/bigorexia?s=ts

I have been thinking a lot in the bigorexia

9.- Body dysmorphic disorder:A psychological disorder in which a person becomes obsessed with imaginary defects in their appearance