how much need beang human food per day
It can not be said clearly how much food is required. But in terms of calories, on an average a woman needs to take 2000 calories per day for a good health while a man require around 2500 calories per day for a healthy body.
If you note down the calories in each of the food item you eat, you may get an idea about how much food is required per day.
Hope it helps.