Your labs are normal. So why do you still feel off?
You're exhausted, foggy, gaining weight, or just not yourself. You got blood work, and you were told everything looks fine. You're not imagining it. "Normal" and "optimal" are not the same thing, and a standard panel leaves a lot unchecked.
Why am I tired if my blood work is normal?
Reference ranges are averages of the whole population, including people who don't feel well. And a 15-minute visit rarely has time to connect your symptoms to your numbers. These are the causes Dr. Cashio finds most often:
Hormones
Testosterone, estrogen, and progesterone can sit inside the "normal" range and still be far below where you feel your best.
Thyroid
Many panels only check TSH. Free T3, reverse T3, and antibodies can tell a very different story.
Metabolic health
Glucose can look fine for years while insulin climbs. Early insulin resistance drives fatigue, weight gain, and brain fog.
Nutrients
Low ferritin, vitamin D, or B12 are common, easy to miss, and easy to fix.
Sleep
Poor sleep and undiagnosed sleep apnea quietly wreck energy, mood, and hormones.
Inflammation & stress
Chronic stress and low-grade inflammation show up as exhaustion long before they show up on a basic panel.
What to do when labs are normal but you feel sick
- Write down your symptoms, when they started, and what makes them better or worse.
- Collect your past labs so trends can be compared, not just single results.
- Ask for the tests that are usually skipped: full hormone and thyroid panels, fasting insulin, ApoB, ferritin, vitamin D, and hs-CRP.
- See a physician who has time. At Code 1, your first visit runs 90 minutes to 2 hours with Dr. Cashio.
Common questions
What should I do when my labs are normal but I still feel sick?
Ask for a deeper look. Standard panels skip many markers and use population ranges rather than optimal ranges. A physician who reviews trends, orders missing tests, and connects results to your symptoms can often find the cause.
Why am I tired if my blood work is normal?
Common hidden causes include suboptimal thyroid function, low testosterone or estrogen/progesterone, insulin resistance, low ferritin or vitamin D, poor sleep or sleep apnea, and chronic stress. Basic panels often don't test for these.
Which tests are often missing from a standard panel?
Free and total testosterone, estradiol, full thyroid panel (free T3, free T4, reverse T3, antibodies), ApoB and Lp(a), fasting insulin, ferritin, vitamin D, and hs-CRP.
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