Though it is also true that we right now produce above 5000 kcal per capita according to FAO. Well above individual calorie needs. "To support our consumption" may be, but the configuration of our current consumption itself is problematic.
The calculation should include logistics, nutritious food that can't be transported unspoiled to the people in need does little good.
[1]: https://en.wikipedia.org/wiki/Malnutrition#Dietary_practices
Just fixing corruption would go a long way towards that goal.