Derek Thompson examines the relationship between obesity and poverty:

[P]overty might make some people obese, but obesity definitely makes many people poorer, through two broad channels: (a) it reduces take-home pay, particularly for women; and (b) it’s related to health conditions that reduce discretionary income, too. If there is there is a close relationship between weight and poverty, it is strongest among women, from the peak of the 1 percent to below the poverty line. At the top, corporate boards appear severely biased against larger women in a way they don’t discriminate against larger men. [John] Cawley’s research found that obesity lowers wages for all workers but particularly for white women. Women who are two standard deviations from normal weight (64 pounds for the typical woman) earn 9 percent less, he writes. Obese women are half as likely to attend college, 20 percent less likely to get married, and seven times more likely to experience illness, depression, or death from being overweight.

(Chart from Pew.)