Context: I went to his house and his mom said he only ate a Peach for dinner . When we work together he always has dizzy spells or says " head rush " both of which I know are caused by lack of eating . I feel really bad for him and I would love him to get better , but at the same time I almost like having him around for competition . He knows I have a slightly altered affliction with food but he does n\'t know how much .
Question: Why did the speaker 's friend suffer a head rush and feelings of faintness after eating only a peach ?
Option 0: They have been overeating most of the day , and are exhausted for this reason alone
Option 1: They ate so little because they are abusing amphetamines , which also cause weakness
Option 2: They have developed diabetes , and their blood sugar is out of whack , they need insulin
Option 3: They are suffering from anemia , due to low iron , due to an exceptionally poor diet
Answer: 3