Magnesium, B12, and Iron: The Energy Nutrients Behind Desire

Why tiredness matters

Fatigue is one of the most common reasons people give for low desire. Many things cause tiredness, but deficiencies in a few nutrients are common and easy to test for.

Iron

• Low iron is a leading cause of anaemia, which causes tiredness, weakness, and shortness of breath.
• People who menstruate, are pregnant, follow a plant-based diet, or donate blood often are at higher risk.
• Food sources: red meat, poultry, fish, beans, lentils, tofu, and fortified cereals. Vitamin C with meals helps absorption.
• Do not take iron supplements without a blood test: too much iron is harmful.

Vitamin B12

• B12 is needed for healthy red blood cells and nerves. A deficiency can cause tiredness and low mood.
• Found almost only in animal foods: meat, fish, eggs, and dairy. Vegans need fortified foods or a supplement.
• Older adults and people taking some long-term medicines (such as metformin or acid-reducing drugs) are more likely to be low.

Magnesium

• Magnesium supports muscle and nerve function, energy production, and sleep.
• Good sources: leafy greens, nuts, seeds, whole grains, and beans.
• Supplements above the upper limit (350 mg per day from supplements for adults) can cause diarrhoea and other side effects.

Bottom line

If you feel tired all the time, ask a doctor for a blood test before buying supplements. Fixing a real deficiency can bring back energy, and with it, interest in intimacy.