Why Am I So Tired All the Time? A Functional Medicine Approach to Fatigue
- Tim St. Onge
- 1 day ago
- 3 min read
Quick Summary
If you've been asking yourself, "Why am I so tired all the time?" you're not alone. Fatigue is one of the most common reasons women seek functional medicine care. Instead of masking symptoms, functional medicine looks for underlying contributors such as poor sleep, hormone changes, thyroid dysfunction, blood sugar imbalances, chronic stress, nutrient deficiencies, inflammation, and gut health.
According to the Cleveland Clinic, fatigue is a symptom—not a disease—and it can have many different underlying causes, including medical conditions, lifestyle factors, stress, poor sleep, and nutritional deficiencies. Let's look at some of the underlying possibilities!
Why You're Always Tired Isn't Always About Sleep
Many women believe feeling exhausted is simply part of getting older.
It's common...
But it shouldn't be considered normal.
At Thrive Chiropractic & Functional Health, we hear comments like these every day:
"I wake up tired."
"I need coffee just to function."
"I crash every afternoon."
"I don't feel like myself anymore."
Fatigue isn't a diagnosis.
It's your body's way of saying something deserves attention.
Functional Medicine Asks a Different Question
Traditional medicine often asks:
"What disease is causing these symptoms?"
Functional medicine asks:
"Why isn't your body producing energy the way it should?"
That difference changes everything.
Instead of looking at one symptom, we evaluate the whole person.
Common Causes of Fatigue
Fatigue rarely has a single cause.
Instead, we often see several small imbalances adding up.
These may include:
Poor sleep quality
Chronic stress
Blood sugar imbalance
Hormone changes
Thyroid dysfunction
Low iron
Vitamin B12 deficiency
Low vitamin D
Chronic inflammation
Digestive issues
Poor nutrition
Your Body Is Like a Bank Account
Think about your energy like money in a checking account.
Every night of poor sleep...
Every stressful week...
Every skipped meal...
Every blood sugar spike...
Every nutrient deficiency...
You're making withdrawals.
Eventually, the account runs low.
Functional medicine focuses on helping you make deposits again.
Where to Start
If you're constantly exhausted, begin with the basics.
Ask yourself:
Am I getting enough sleep? (7-9 Hours)
Am I eating enough protein? (100 grams or more)
Am I drinking enough water? (half my body weight in ounces)
Am I moving every day?
Am I constantly stressed?
Have I had a thorough health evaluation?
Small improvements often create significant changes.
Health Hack
This week's Health Hack:
For seven days, rate your energy from 1–10 three times each day.
Also record:
Sleep
Protein intake
Water
Stress level
Exercise
Patterns often appear that you never noticed before.
Key Takeaways
Fatigue is a symptom, not a diagnosis.
Poor sleep isn't always the only cause.
Hormones, thyroid health, blood sugar, stress, and inflammation all influence energy.
Functional medicine focuses on identifying root causes rather than simply managing symptoms.
Small lifestyle changes often lead to meaningful improvements.
Frequently Asked Questions
Why am I tired all the time?
Persistent fatigue can have many contributing factors including poor sleep, thyroid dysfunction, hormone changes, stress, nutrient deficiencies, blood sugar imbalance, or inflammation.
Can hormones cause fatigue?
Yes. Hormonal changes during perimenopause and menopause can affect energy, sleep, mood, and metabolism. You can read our related article on hormones here.
Can thyroid problems make me tired?
Yes. Thyroid dysfunction is one of many possible contributors to low energy and should be evaluated alongside other aspects of your health. Click here for a complete article on Thyroid evaluation
When should I seek help for fatigue?
If fatigue is affecting your daily life or doesn't improve with rest and healthy habits, it's worth discussing with a qualified healthcare provider. If you would like to schedule a time to chat with us to see if we can help, click the button below and we will listen and help you figure out your next steps!
Written By Dr. Jeni St.Onge and Tara Peterson
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