Thyroid Health · Hormones · Root Cause
Your thyroid test came back "no
If you've ever been told your labs look fine while you're exhausted, foggy, and freezing cold in July — this one's for you.
Let's be honest: "your TSH is normal" might be one of the most frustrating sentences in medicine. You walked in dragging yourself, barely functioning, and walked out with a clean bill of health and zero answers. Sound familiar?
Here's the thing. The standard thyroid test — the TSH — was developed in the 1970s. It's been over 50 years. The science has moved on. The approach, largely, has not.
Wait, what's actually going on with my thyroid?
Your thyroid produces two main hormones: T4 and T3. T4 is like a raw ingredient — it doesn't do much on its own. Your body has to convert it into T3, the active form that actually powers your cells. T3 is the one running the show: your energy, mood, metabolism, body temperature, brain clarity, digestion, heart rate — all of it.
Standard testing mostly checks your TSH (a signal from your brain to your thyroid) and sometimes T4. It rarely checks whether your body is actually converting that T4 into active T3 — or whether that T3 is getting into your cells and doing its job.
So you can have a "normal" TSH and still have insufficient T3 circulating in your tissues. Which means: real symptoms, real suffering, and a lab report that says everything looks great.
What does low T3 actually feel like?
If several of these feel uncomfortably familiar, your thyroid might deserve a closer look:
Left unaddressed, thyroid dysfunction can also contribute to high cholesterol, infertility, fibromyalgia, and chronic fatigue. These aren't small things. They're quality-of-life things.
Why does the standard treatment often fall short?
Most people with hypothyroidism are prescribed levothyroxine — a synthetic T4-only medication. For some people, that works well. For many, it doesn't. Because you still need that conversion step. And a lot of us — especially as we age, or if we have inflammation or certain genetic variations — don't convert T4 to T3 efficiently.
So you take your pill every morning. Your TSH normalizes. Your doctor says you're good. And you still feel like you're running on 20% battery.
So what's the better approach?
A more complete picture means testing both Free T4 and Free T3 — not just TSH. It means listening to how you actually feel, not just what a number says. And for many people, it means considering a treatment that includes T3 directly — either as a synthetic combination or as desiccated thyroid extract (a natural option that contains both T4 and T3).
Test Free T3 and Free T4, not just TSH
Treat symptoms alongside lab values — feelings are data
Consider T4 + T3 combination therapy when T4 alone isn't enough
Adjust slowly and carefully, especially if heart health is a concern
Patients who switch to combination therapy often report clearer thinking, more stable energy, easier weight management, and a lifted mood — things that T4-only treatment left behind. Not everyone responds the same way, and there are considerations (like cortisol levels and heart health) that need to be part of the conversation. But the option deserves to be on the table.
The bottom line
You deserve to feel well — not just look normal on paper. If you've been dismissed, undertreated, or told "your labs are fine" while still feeling like a depleted version of yourself, know that a more thorough evaluation exists. Ask for it. Advocate for it.
Your symptoms are real. Your thyroid might just need someone who's actually looking for the full picture.