Comparison of the amount of a particular nutrient consumed with the amount of the nutrient excreted is characteristic of a(an):

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A balance study compares the intake of a nutrient with the amount excreted in the urine and feces. It allows researchers to determine how much of a nutrient is retained by the body and how much is eliminated, providing information about the body's requirements for that nutrient. Collection studies involve collecting data or samples over a period of time, but do not necessarily compare intake and excretion. Depletion-repletion studies involve deliberately restricting or increasing intake of a nutrient to study its effects on the body. Epidemiological studies look at the prevalence and causes of disease in populations, and do not necessarily focus on nutrient balance.

Comparison of the Amount of a Particular Nutrient Consumed with the Amount