Have you been feeling “wiped out,” gaining weight around the middle, or struggling with “brain fog”?

As an Iridology Informed Naturopath, I see this daily. Women are told their labs are “fine,” yet they feel anything but.

Because your thyroid regulates your metabolism, mood, and heart rate, any imbalance can leave you feeling fundamentally disconnected from yourself.

The “Subclinical” Gap: Why “Normal” Isn’t Enough

Most conventional doctors use a disease model. They look at your bloodwork and ask: “Are you in a state of failure?” Usually, they only test two markers: TSH and T4.

In the functional medicine world, we look for optimal health.

· The Reality: 60% of women in the U.S. have subclinical hypothyroidism. They don’t have a full-blown disease yet, but their thyroid isn’t functioning well enough for them to feel good.

· The Autoimmune Connection: Of that 60%, nearly 90% are estimated to have Hashimoto’s, an autoimmune condition where the body attacks its own thyroid.

Stop Guessing: The Comprehensive Panel

If you’re only getting your TSH checked, you’re missing the full picture. To truly see how your thyroid is performing, you need a Comprehensive Thyroid Panel.

I recommend every woman get a baseline at age 20 and then every five years—sooner if you are experiencing symptoms.

Six Essential Markers to Ask For:

· TSH (The signal from your brain)

· Free T4 (Storage hormone)

· Free T3 (The active hormone that gives you energy)

· Reverse T3 (The “brake pedal” that can slow you down)

· TPO Antibody (To check for Hashimoto’s)

· ATA Antibody (Another key autoimmune marker)

The Functional Target Zones

While a standard lab might tell you that a TSH of 4.5 is “fine,” we are looking for a much tighter window to ensure your metabolism and energy are firing correctly:

· TSH: We want this under 2.0. This is the signal from your brain to your thyroid; if it’s climbing higher, your brain is “shouting” at a sluggish thyroid.

· The “Active” Hormones: We look for Free T3 (3.0–4.0) and Free T4 (1.0–1.5) to be in the upper end of their respective ranges. These are the hormones that actually do the work in your cells.

· The “Brake Pedal”: Reverse T3 should be less than 15. If this is high, your body is essentially putting the brakes on your metabolism, often due to stress or chronic inflammation.

· Total Output: We monitor Total T4 (6–12) and Total T3 (100–180) to ensure your thyroid is producing enough raw material to begin with.

I’ve found that seeing these ranges laid out side-by-side helps patients realize just how narrow the window for feeling “great” actually is compared to the very broad “normal” ranges used by most labs.