Persistent fatigue is one of the most common things working women raise in nutrition consultations. Balancing work, home, and personal needs leaves a lot of people feeling drained. Lethargy isn’t a permanent state — it’s usually a signal that some combination of sleep, nutrition, activity, stress, or an underlying medical issue needs attention.
Here are practical strategies that, together, cover most of what we work on in practice.
1. Rule out medical causes first
Before attributing ongoing fatigue to diet or lifestyle alone, it’s worth checking in with your doctor. Common, treatable medical causes of persistent tiredness include:
- Iron deficiency and iron-deficiency anaemia (common in menstruating women and during pregnancy)
- Vitamin B12 or vitamin D deficiency
- Thyroid disorders (hypothyroidism and hyperthyroidism)
- Diabetes or poorly controlled blood sugar
- Sleep disorders, including obstructive sleep apnoea
- Depression or anxiety — these can present as physical fatigue
A basic blood workup — haemoglobin and ferritin, vitamin B12, vitamin D, thyroid, fasting glucose or HbA1c — often tells you more than a restrictive diet experiment would. Food allergies and intolerances do exist, but they are an uncommon cause of isolated, persistent fatigue and shouldn’t be self-diagnosed through elimination. If a clinician suspects a food sensitivity is relevant, a structured elimination–reintroduction protocol under supervision is the appropriate next step.
2. Sleep and stress
Chronic stress and poor sleep are probably the biggest day-to-day drivers of tiredness in healthy adults. Stress management practices — regular exercise, yoga, meditation, reading, or simply protecting a wind-down hour before bed — make a real difference. So do steady meal times and routine sleep/wake times.
Watch caffeine and alcohol too: both look like they help in the short term and tend to erode sleep quality when overused, especially in the afternoon and evening.
3. Break the monotony
Routine can become numbing. Small changes — a different route to work, a new hobby, a different morning sequence — can help by creating novelty for your brain.
4. Eat for steady energy
Rather than chasing any one “energy food”, the pattern to aim for is meals built around:
- A source of protein (pulses, eggs, fish, meat, dairy, tofu)
- Whole-food carbs (millets, brown rice, whole wheat, fruit, vegetables)
- Healthy fats (nuts, seeds, avocado, olive oil, oily fish)
- Plenty of colourful vegetables and fruit for micronutrients and fibre
This pattern avoids the energy highs and crashes that come from skipping meals or eating a lot of refined carbohydrate on its own.
5. Hydrate sensibly
Plain water is the baseline. Herbal infusions (tulsi/basil, ginger, fennel, hibiscus) can be pleasant and add variety without caffeine. Keep caffeinated drinks to earlier in the day and avoid using them to paper over poor sleep — the tiredness catches up eventually.
6. When to escalate
If fatigue is severe, doesn’t respond to a few weeks of better sleep and regular meals, is associated with weight change, breathlessness, palpitations, heavy periods, mood changes, or interferes with daily function — please see a doctor. Ongoing, unexplained fatigue is worth investigating, not powering through.
Lethargy is a signal, not a destination. Start with sleep, routine, and a balanced eating pattern; rule out the common medical contributors; and build from there. For most people, a few steady changes over a few weeks make more difference than a big, short-lived overhaul.
Sources
- National Heart, Lung, and Blood Institute. Iron-Deficiency Anemia.
- American Thyroid Association. Hypothyroidism and Hyperthyroidism patient information.
- NHS. Tiredness and fatigue.
- Watson NF et al. Recommended amount of sleep for a healthy adult: a joint consensus statement of the American Academy of Sleep Medicine and Sleep Research Society. J Clin Sleep Med 2015.