Laboratory tests are essential to assess patients' health status, allowing for more assertive nutritional planning. But can the nutritionist request tests? The answer is yes! In this article, we will explore in detail the exams that nutritionists may request, how to interpret them, and how to integrate them into clinical practice.

Can a nutritionist request laboratory tests?

In accordance with the Resolution CFN No. 306/2003, regulated by the Federal Council of Nutritionists (CFN), nutritionists are competent to request laboratory tests related to their area of expertise. This means that the professional may request tests to assist in the assessment of nutritional status and in the identification of deficiencies, excesses, or metabolic disorders that may interfere with the patient's health.

However, it is essential that the nutritionist is properly qualified and that the request for tests is based on a careful assessment of the patient. It's also important to remember that laws may vary between states, and it's recommended to check local regulations.

What tests can be requested by the nutritionist?

The tests requested by the nutritionist are those directly related to the patient's nutritional and metabolic status. Some of the key exams include:

1. Complete blood count

This exam provides valuable information about the general health status, helping to identify anemias, infections, and other conditions that may impact nutrition.

2. Lipid profile

It includes total cholesterol, HDL, LDL, and triglycerides. These markers help assess cardiovascular risk and adjust for hyperlipidic or hypolipidic diets.

3. Fasting blood glucose and glycated hemoglobin

These tests are important for monitoring glycemic control and are useful in monitoring patients with diabetes or insulin resistance.

4. Vitamins and minerals

Markers such as vitamin D, vitamin B12, iron, ferritin, zinc, and magnesium help identify nutritional deficiencies.

5. Liver and kidney function

Tests such as TGO, TGP, creatinine, and urea provide data on the functioning of the liver and kidneys, organs essential for metabolism.

6. Inflammatory markers

C-reactive protein (CRP) and other markers are useful in evaluating inflammatory processes, which may be related to several chronic conditions.

7. Hormones

Evaluation of TSH, T3, T4, and cortisol to investigate hormonal disorders that may impact nutritional status.

How to analyze exam results

Exam interpretation requires technical knowledge and attention to detail. Here are some guidelines:

1. Clinical contextualization

The results should be analyzed in the context of the patient's clinical history and dietary habits. For example, low vitamin D levels can be attributed to too little exposure to the sun or to an inadequate diet.

2. Reference values

Compare the results with the reference values provided by the laboratory, but consider that individual variations may occur.

3. Relationships between markers

Do not analyze the markers in isolation. For example, low hemoglobin levels associated with low ferritin indicate iron deficiency anemia.

4. Personalized interpretation

Adapt the recommendations to the patient's profile. An athlete may have high CK values due to the high intensity of training, which does not necessarily indicate a pathological condition.

Benefits of exams in nutritional practice

Requesting and correctly interpreting exams offers several benefits:

• Early diagnosis: Identifies deficiencies and metabolic changes before the development of diseases;

• Individualized planning: It allows the preparation of more precise and effective eating plans;

• Monitoring and adjustments: It facilitates the monitoring of the patient's evolution and necessary adjustments in behavior.

How to request exams efficiently

To ensure that the exams contribute effectively to nutritional behavior, follow these tips:

1. Be objective: Request only those tests necessary to evaluate the patient;

2. Explain to the patient: Tell me about the importance of exams and how they will be used for follow-up;

3. Stay up to date: Follow scientific studies and guidelines to base your requests on consistent evidence;

The nutritional practice integrated with laboratory tests allows for a more complete and effective approach, strengthening the relationship between the health professional and the patient. By mastering this process, nutritionists expand their competencies and contribute significantly to the promotion of health and quality of life. How about starting to incorporate this strategy into your practice today?

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