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This mini article is part of The Unprescribed, a series of reflections on the prescriptions doctors wish they could write, but never do. Shared on Sundays.

By Dr. Maria K. Jimmy

Brain fog can make you feel forgetful, distracted, mentally tired or unusually slow.

Here are five practical, evidence-based ways to support mental clarity and brain health:

1. Sleep Well and Stay Hydrated

Aim for 7–9 hours of quality sleep and drink enough fluids throughout the day.

Poor or fragmented sleep can affect attention, memory and information processing, while dehydration can affect concentration and cognitive performance.

2. Move Your Body and Manage Stress

Regular physical activity supports brain health. Chronic stress can also interfere with attention, memory and information processing.

Make time for regular exercise and consider evidence-based stress-management approaches such as mindfulness, relaxation techniques or other activities that help you unwind.

3. Eat Well and Correct Nutritional Deficiencies

A balanced diet containing vegetables, fruits, whole grains, legumes, nuts, adequate protein and other nutrient-rich foods supports overall health.

If vitamin B12 or iron deficiency is contributing to your symptoms, treating the deficiency under medical guidance may help improve cognitive symptoms.

4. Treat Underlying Conditions and Review Your Medications

Brain fog can occur alongside conditions such as diabetes, thyroid disorders, sleep apnoea and others. Certain medicines, including some sedating medications and antihistamines, can also affect alertness or concentration.

If you notice brain fog after starting a medication, speak to your doctor. Do not stop a prescribed medicine on your own.

5. Find the Cause If It Doesn’t Clear

Occasional brain fog after a poor night’s sleep or a stressful period may improve once you recover. But if it persists, worsens or interferes with your work, studies or daily life, speak to a doctor.

Remember

There is no single treatment for brain fog because it is a symptom rather than a medical diagnosis.

Finding and treating the underlying cause is the most important step towards getting your mental clarity back.

The Unprescribed / Advice that never makes it onto the prescription note.