Weight gain has a latency period. The effect that eating has on weight gain can vary greatly depending on the following factors: energy(calorie) density of foods, exercise regimen,amount of water intake, amount of salt contained in the food, time of day eaten, age of individual, individual’s country of origin,individual’s overall stress level, and amount of water retention in ankles/feet.Typical latency periods vary from three days to two weeks after ingestion.Despite the connotations that excess weight had in the past, it has for some time been seen as “unacceptable”, in contemporary Western society.An expansive market has taken root since the mid-20th century, focusing on weight loss regimens, products and surgeries. This market has been aided by the rising number of overweight and obese citizens in the United States. Data from the CDC’s National Health and Nutrition Examination Survey, indicates that the average weight of women between ages 30 and 60 has increased by 20 pounds, or 14%,since 1975. Among women who weigh 300 pounds or more, the increase was 18%.