Nutrition Benchmark Practice Test

Which of the following factors is NOT known to increase BMR?

Hair color Age Thyroid status Fever

Correct Answer:

Hair color

Explanation:

BMR reflects the body's energy needs at rest and is driven by factors that change metabolic rate, not by cosmetic traits. Fever raises BMR because the body works harder to fight infection and maintain a higher temperature. Thyroid status also shifts BMR: higher thyroid hormone levels speed up many metabolic processes, increasing energy use. Age tends to lower BMR over time as lean body mass and metabolic activity decline. Hair color, on the other hand, is a pigment-related trait with no mechanism that alters resting energy expenditure. So hair color is not known to increase BMR.

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