Tiredness is one of the most common health complaints today. It is no longer associated with old age. Even young children and adults often experience it. In many cases, this fatigue is caused by underlying deficiencies, some of which can be detected early through simple blood tests. Here’s a list of blood tests you should take in order to find out the real reason behind this.

1. Complete Blood Count (CBC)

The CBC test checks for issues like anemia & infections. Anemia is common, especially among women and vegetarians & happens when your body doesn’t have enough red blood cells. That means less oxygen reaches your muscles and brain, leaving you exhausted. According to the World Health Organization, nearly 1 in 3 women globally are anemic. A CBC also looks at white blood cells. If they are too high, your body might be fighting an infection which also drains your energy.

2. Thyroid Function Test

Your thyroid controls your metabolism and energy. If it’s underactive (hypothyroidism), you’ll feel sluggish, cold, and gain weight easily. If it’s overactive (hyperthyroidism) you might lose weight fast but still feel tired, anxious & irritable. A thyroid test checks TSH, T3 & T4 levels. Slight shifts in these numbers can cause major changes in how your body feels every day.

3. Vitamin D Test

Vitamin D helps regulate your immune system and energy. A large percentage of people living in cities have low Vitamin D because they don’t get enough sunlight. According to a 2025 expert consensus in the Indian Journal of Endocrinology and Metabolism, nearly 490 million people in India are estimated to be Vitamin D deficient, with more than half of Indian children and adolescents showing deficient levels. This often shows up as bone aches, tiredness, or mood swings. A simple blood test can show if you’re low and if you need supplements.

4. Vitamin B12 Test

B12 helps your body make red blood cells and keeps your nerves healthy. When your levels drop, it can lead to fatigue, weakness, dizziness, and even memory problems. Its deficiency is especially common among vegetarians, older adults & those with digestive issues. If you’ve been feeling unusually tired or mentally foggy, getting a Vitamin B12 Test could help identify if low B12 is the reason behind it.

 

Let’s Help You Feel Better

Fatigue is not something you should ignore especially when it keeps showing up day after day. The right tests can uncover what’s really going on & help you feel better, faster. At Mera Diagnostic House, we’re here to support that journey.

With a presence in 70+ cities, timely report delivery, and easy home sample collection, we make testing simple and stress-free. Whether you are looking for a Blood Test in Delhi, a Vitamin B12 Test  Near me, or any other routine or advanced diagnostic check, we’ve got you covered. Our labs are fully equipped to provide fast, reliable, and accurate results because your health deserves nothing less.

Reach out to us & take the first step towards feeling like yourself again.