You’re sleeping. You’re not particularly stressed (or so you tell yourself). You’re eating “fine.” And yet by 2 PM every afternoon, you’re running on willpower and a second cup of chai.
This is one of the most common complaints I hear from people in their late 20s to 40s: a persistent, low-grade exhaustion that no amount of sleep seems to fix. And the reason it persists is usually because it’s being misdiagnosed — by the person experiencing it — as a sleep problem.
Often, it isn’t.
The Hidden Causes of Persistent Fatigue
Undiagnosed Iron Deficiency (Especially in Women)
Anaemia is extraordinarily common in India — and iron deficiency can cause fatigue even before it becomes full anaemia. The problem is that many people feel “just tired,” not ill, so they never get tested. A basic blood test including ferritin (not just haemoglobin) will tell you. If your ferritin is below 50 ng/mL, supplementation under medical guidance can be genuinely transformative.
Thyroid Function Issues
An underactive thyroid (hypothyroidism) is one of the most common causes of unexplained fatigue, especially in women, and one of the most frequently missed. You can sleep perfectly and still feel like you’re dragging through concrete if your thyroid hormone levels are off. Get a full thyroid panel (TSH, T3, T4) if fatigue is persistent.
Blood Sugar Instability
If your energy spikes after eating and then crashes within an hour or two, leaving you foggy and craving something sweet — your blood sugar regulation may be the culprit. This is worsened by meals heavy in refined carbohydrates (white rice, maida, sugar) without adequate protein or fat to slow glucose absorption.
Dehydration
India’s climate means significant fluid loss, especially in summer. Even mild dehydration — well before thirst kicks in — causes measurable drops in cognitive performance, concentration, and energy. Most people are consistently mildly dehydrated throughout the day.
Fix: 2.5–3 litres of water daily, adjusted for activity and heat. Yes, more than you think.
Mental Load Masquerading as Physical Tiredness
This one is subtle. Chronic worry, background anxiety, unresolved emotional stress, or simply carrying too much responsibility without adequate support generates real, physical fatigue. The body processes emotional and cognitive stress with genuine physiological energy expenditure.
What to Actually Do
Step one: get blood work. Specifically, ask for: CBC, serum ferritin, thyroid panel, Vitamin D, Vitamin B12, and fasting blood glucose. These are affordable and available everywhere.
Step two: address the obvious: sunlight exposure within an hour of waking (for cortisol rhythm), consistent sleep and wake times (more important than sleep duration), adequate protein at every meal, and genuine rest — not phone-in-bed rest.
Energy isn’t just about sleep. It’s about the whole system.