Final answer:
Diuretic users should monitor potassium intake; Drug-nutrient interactions can reduce drug efficacy.
Explanation:
Someone who is taking a diuretic should be cautious about potassium levels in their diet as diuretics can lead to potassium depletion. Consuming potassium-rich foods or supplements may help offset this effect.
A disadvantage of a drug-nutrient interaction is reduced efficacy of the medication due to interactions with certain foods, which can hinder the drug's absorption or lead to unwanted side effects.
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