A patient is experiencing symptoms of nutrient deficiency despite having a sufficient intake of food. Which process is most likely impaired?

Choice A rationale Digestion is the mechanical and chemical breakdown of food into absorbable components, such as amino acids, simple sugars, and fatty acids, primarily occurring in the stomach and small intestine. If digestion were impaired, the body would struggle to break down nutrients from the food source, but not necessarily to utilize them once absorbed, which suggests a different metabolic issue. Choice B rationale Ingestion is the act of taking food into the body, which simply involves the mechanical process of eating and swallowing. Since the patient is reported to have a sufficient intake of food, the physical act of ingestion is likely unimpaired, making this process an unlikely cause for the downstream symptoms of nutrient deficiency. Choice C rationale Metabolism refers to all chemical processes that occur within a living organism to maintain life, including the utilization of nutrients for energy production, growth, and repair after absorption. Impaired metabolic pathways, such as issues with enzyme function or cellular energy production, would prevent the body from effectively using sufficient nutrients, directly leading to deficiency symptoms despite adequate intake. Choice D rationale Elimination is the process of removing unused or waste products from the body, primarily as feces or urine, after digestion and absorption have occurred. While elimination disorders can affect nutrient absorption (e.g., severe diarrhea), the primary impairment described—sufficient intake but deficiency symptoms—most directly points to an inability to utilize nutrients, which is a key metabolic function. .