A part answer to how much food a malnourished person would get each day. Kalyan Puri, india;
"On every street corner of this district, at around noon, a woman with a big tin pot ladles out thick gruel to a stream of small children carrying tin bowls. Each one is meant to get exactly 320 grammes, but few are measuring what ends up in their bowls."

"The results are evident in the charity-run primary school run for street kids behind the police station. Here, teacher Amitha Joshi says many children do not eat from early in the morning when their parents leave home until late at night. "They cannot concentrate, cannot retain any facts, they have serious behavioural problems," she told the Guardian."
Taken from:
http://www.guardian.co.uk/global-development/2010/sep/14/mdg1-hunger-poverty-india
I'm off to take a make my tea and will weigh out how much 320 grammes is and take a picture.