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Why Am I So Tired and Have No Energy? A Naturopathic Doctor’s Guide

Dr. Tanya O'Brien, ND
Oct 8
3 min read

“I’m just so tired.” It’s one of the most common things we hear from patients. Many have already seen their family doctor, had bloodwork done, and been told everything looks normal. But they still wake up exhausted, hit a wall every afternoon, and rely on coffee to get through the day.

If that sounds like you, you’re not imagining it. Fatigue is real, and it usually has a cause, often more than one.


Fatigue is a symptom, not a diagnosis


Feeling tired all the time is your body telling you something is out of balance. As Naturopathic Doctors, our job is to figure out what. Below are some of the most common causes we look at:


1. Low iron, B12 or vitamin D


Your body needs iron, B12 and vitamin D to make energy. Low levels are very common, especially in women with heavy periods, people who eat little or no meat, and anyone living through a Newfoundland winter with limited sunlight. Sometimes levels fall within the “normal” range but are still too low for you to feel your best.


2. Tired after eating? Blood sugar or food sensitivities


If you feel tired after eating, crash mid-afternoon or crave sugar and caffeine, it could be blood sugar or food sensitivities, or both. Meals heavy in refined carbs can cause a quick spike in blood sugar, then a drop that leaves you drained. Balancing meals with protein, fibre and healthy fats can make a big difference.

Food sensitivities are different from allergies. Their symptoms can be delayed by hours, so they’re easy to miss. Along with fatigue, you might notice bloating, brain fog or headaches after certain foods. Finding and reducing your trigger foods can help your energy come back.


3. Stress and burnout


Long-term stress keeps your body in “go” mode. Over time, many people end up feeling wired at night but exhausted during the day. Busy parents, shift workers and anyone caring for others are especially prone to this.


4. Poor-quality sleep


Eight hours in bed isn’t the same as eight hours of restful sleep. Waking up during the night, waking too early, or never feeling refreshed can all point to something affecting the quality of your sleep, such as stress, blood sugar, mineral imbalances or hormone changes.


5. Digestion


You can only use the nutrients you absorb. If you have bloating, IBS or other digestive issues, your body may not be getting what it needs from your food, even if you eat well.


6. Hormone changes


Thyroid imbalances, PMS and perimenopause can all drain your energy. Many women notice they feel more tired around their period, or that their energy changes in their 40s as perimenopause begins.


Why “normal” labs don’t always tell the whole story


Routine bloodwork is an important starting point, and we always recommend it. But normal ranges are wide, and standard tests don’t capture everything. Stress, sleep quality, digestion and mineral balance can all affect your energy without showing up on a routine panel. That’s why we take a detailed health history and look at the whole picture.


When to see your family doctor first


Please see your family doctor if your fatigue is new, severe or getting worse, or if it comes with symptoms like unexplained weight loss, shortness of breath, chest pain or fever. We're happy to work alongside your medical team.


How a Naturopathic Doctor can help


At Health For Life, we start by listening. In your first visit, we go through your health history, symptoms, diet, sleep and stress in detail. We review any recent bloodwork and discuss whether further testing could help. We have access to functional testing that can dive deeper into digestion (stool), hormones (DUTCH urine), adrenals (salivary cortisol), mineral balance (Hair Tissue Mineral Analysis) and food sensitivities (IgG blood testing). From there, we build a personalized plan, which may include nutrition, targeted supplements, botanical medicine and lifestyle changes, so you can get your energy back.


Ready to stop feeling exhausted?


Dr. Kathleen Mercer, ND and Dr. Tanya O’Brien, ND see patients in person at Winterholme Wellness in St. John’s, and online across Newfoundland and Labrador. No referral is needed, and naturopathic visits are covered by many extended health plans.




Tired woman holding a coffee mug, feeling exhausted with no energy

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