How the lack of food is affecting people?

It affects the world by the 820 million people who don't have enough food and the 20 million people at risk of famine. The physical and mental affects on people include:
long and short term health problems
depression
muscle weakness, can lead to falls which could cause broken bones or fractures
fatigue and tiredness
can impair the develop of a child's brain, which affects how they do in school
weak immune system
causes issues with memory
Without the proper amount of food life for people is affected in many ways, making life harder for them.