Iron, magnesium, vitamin B12, vitamin D… when fatigue appears, micronutrients are often the first suspects. They do indeed contribute to many bodily functions. But a feeling of lack of energy alone does not indicate insufficient intake or the need for supplementation.
Why are micronutrients important?
Vitamins and minerals are involved in metabolism, cell formation, muscle, nerve, and immune function. Their functions and dietary sources differ. Anses publishes nutritional reference values that vary according to age, sex, activity level, and certain physiological situations.
Why is fatigue alone not enough to identify a deficiency?
Because fatigue is a very non-specific symptom. Lack of sleep, stress, convalescence, medication, sleep disorders, anemia, or other health problems can produce similar sensations. The context and, if necessary, examinations prescribed by a professional can provide further insight.
The trap of the "I'm tired, therefore I'm missing something" reasoning
This shortcut can lead to purchasing several products without knowing the cumulative doses. However, Anses reminds us that food supplements can pose risks, particularly in cases of multiple, prolonged use or when combined with certain medications.
What to check before any supplementation?
- Actual diet: variety, restrictions, recent changes, appetite.
- Other sources: fortified foods, drinks, gummies, or multivitamins.
- Treatments: some supplements can interact with medications.
- Context: pregnancy, chronic illness, or a very restrictive diet require an individualized approach.
- Duration of fatigue: persistent fatigue warrants seeking a cause rather than a succession of remedies.
What can diet provide?
A varied diet provides a wide range of nutrients. Sources vary depending on micronutrients: legumes, cereals, vegetables, fruits, animal products, or suitable alternatives can contribute to different intakes. There is no single food that covers all needs.
Our article Diet and Energy: The Basics for a More Regular Day offers a holistic approach.
When to talk to a professional about fatigue?
Consult if it persists, becomes profound, is accompanied by shortness of breath, palpitations, unexplained weight loss, significant digestive symptoms, or other unusual changes. The professional will decide if an assessment is useful.
To learn more about the roles, sources, and precautions, see Vitamins and Minerals for Energy — Part 1.
References
- Anses — Nutritional reference values for vitamins and minerals
- Anses — Food supplements: uses and risks
- Assurance Maladie — Fatigue: medical consultation
This content does not constitute a prescription. Medically recommended supplementation should not be altered without professional advice.