What are some ways of analyzing nutritional health?
Anthropometric measurements - external measurement of the body - taking into consideration, height, weight, body fat.
Medical history and physical exam - taking into consideration medical history or patient and patient's relatives ( history of diseases in family? ), life stage ( old man? ), current health conditions.
Laboratory measurements - blood, pee pee, poop tests. Blood tests tells you what is in the system now, pee and poop tests tell you what is not being absorbed.