Which of the following methods is used to detect nutrient deficiencies?

Question

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Assessment techniques such as blood tests and dietary analysis are the most reliable methods for detecting nutrient deficiencies since they provide quantitative data. Nutrient stages identification and overt symptoms identification may be indicative of deficiencies, but they are not always specific to a particular nutrient and may require further testing to confirm. Outward manifestations assessment may be subjective and unpredictable since individuals may display various symptoms and signs of nutrient deficiencies.

Which of the Following Methods Is Used to Detect Nutrient