Impacts on food availability and nutritional quality will increase the number of people at risk of hunger, malnutrition and diet- related mortality . Climate change will increase the number of people at risk of hunger in mid-century, concentrated in Sub-Saharan Africa, South Asia and Central America  . Increased CO2 concentrations will reduce nutrient density of some crops . Climate change will increase loss of years of full health3 by 10% in 2050 under Representative Concentration Pathway  8.5 because of undernutrition and micronutrient deficiencies . 
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report