Deficiencies, excesses or imbalances in a person's intake of energy and/or nutrients. The term malnutrition addresses three broad groups of conditions: undernutrition, which includes wasting , stunting  and underweight ; micronutrient-related malnutrition, which includes micronutrient deficiencies  or micronutrient excess; and overweight, obesity and diet-related non-communicable diseases  . Micronutrient deficiencies are sometimes termed 'hidden hunger' to emphasise that people can be malnourished in the sense of deficient without being deficient in calories. Hidden hunger can apply even where people are obese.
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report