What scientific word is used to describe a person who is deficient in one or more particular food groups?

The scientific word used to describe a person who is deficient in one or more particular food groups is "malnutrition." Malnutrition occurs when an individual's diet does not provide adequate nutrients, whether due to a lack of food variety, insufficient food intake, or an imbalance in essential nutrients. This can lead to various health issues, depending on which nutrients are lacking.

Malnutrition is not limited to undernutrition; it also encompasses overnutrition, where excess intake of certain foods can lead to obesity and associated health problems. It is important to recognize the signs of malnutrition, which can include weight loss, fatigue, weakened immune response, and developmental issues in children. Addressing malnutrition often requires dietary changes and sometimes supplementation to ensure a balanced intake of vitamins and minerals necessary for optimal health.