Startup Idea : Donate your calories

There are rich and there are poor. Rich pay more to eat less (organic/diet counseling/supplements) and the poor pay more and yet eat less. I want to encourage the rich or perhaps people who can afford or even may desire to do so to be able to donate those extra calories which they may not consume in the name of health to those who anyways need good nutrition. My idea is to connect health conscious and willing to be conscious people though my platform with organizations and NGOs who are working for the betterment of health for many across the globe. My idea is a create a platform where people register and donate their unhealthy calories which in turn becomes healthy calories for the people in need. This way both the purpose is served. Party A continues to remain fit. Party B continues to get basic nutrition. The unhealthy calories which party A( donors) could have eaten but instead did not eat, gets converted into a monetary value. This monetary value gets converted in to basic nutrition calories for party B ( receiver/ organizations) There is more to this idea in my mind and I am willing to know more from your end.