Hormone Therapy / Thyroid

Thyroid Doctor in San Diego, CA — Undiagnosed Hypothyroid & Reverse T3

Comprehensive thyroid testing and treatment in San Diego — for patients told their labs are normal but still feel exhausted, cold, and foggy. Reverse T3, free T3, and full thyroid workups by Dr. Joseph Dubroff, N.D.

Book Free Consultation Call 949-444-0583
Thyroid doctor San Diego undiagnosed hypothyroid
"Your Labs Are Normal."

The Phrase You've Heard Too Many Times — and Why It's Almost Certainly Wrong.

Here's what a typical thyroid workup at a primary care office looks like: your doctor orders TSH. Maybe — if they're thorough — they add free T4. The result comes back inside the lab's reference range, and you're told everything is fine. Try sleeping more. Maybe lose some weight. Have you considered an antidepressant?

That workup misses the markers that actually matter.

The conventional thyroid panel doesn't measure free T3 — the active form of thyroid hormone your cells actually use. It doesn't measure reverse T3 — a competitive inhibitor that can block thyroid hormone from working even when your numbers look fine. It doesn't measure thyroid antibodies, which can flag autoimmune thyroid disease (Hashimoto's) years before TSH ever moves. And it reads everything against population reference ranges that include large numbers of unwell people, not against the optimal ranges where most patients actually feel well.

This Is Why You're Still Exhausted.

If you've been told your thyroid is "fine" but you're cold, exhausted, gaining weight you can't lose, losing hair, foggy, and barely making it through the afternoon — your thyroid is almost certainly part of the story. The labs your doctor ran weren't comprehensive enough to see it. Dr. Dubroff runs the full panel and reads it against optimal ranges, not statistical averages.

The Difference

What Most Doctors Run vs. What Actually Reveals the Truth.

If your doctor only ordered TSH and free T4, they got a vastly incomplete picture of your thyroid health. Here's the difference between a basic panel and what Dr. Dubroff actually orders.

Dr. Dubroff Orders

Comprehensive Thyroid Panel

  • TSH (read against optimal range, not statistical)
  • Free T4 — circulating storage hormone
  • Free T3 — the ACTIVE thyroid hormone
  • Reverse T3 — competitive inhibitor blocker
  • Free T3 to Reverse T3 ratio
  • TPO antibodies (Hashimoto's marker)
  • Thyroglobulin antibodies
  • Iron, ferritin, vitamin D, B12 (T4→T3 conversion)
  • Cortisol & DHEA (stress impact on thyroid)
Most Primary Care

Basic Thyroid Screen

  • TSH only (read against statistical range)
  • Free T4 (sometimes)
  • No free T3 measured
  • No reverse T3 measured
  • No T3:RT3 ratio calculated
  • No antibodies tested
  • No micronutrient assessment
  • No conversion factors evaluated
  • No cortisol/DHEA correlation
Recognize Yourself?

Classic Hypothyroid Symptoms Often Dismissed.

Any combination of these symptoms — even with "normal" TSH — is worth a comprehensive thyroid evaluation.

Persistent FatigueTired even after a full night's sleep. Need a nap to function.
Always ColdCold hands and feet. Need extra layers when others don't.
Stubborn Weight GainCan't lose weight despite reasonable diet and exercise.
Brain FogWord recall issues, focus problems, mental sluggishness.
Dry Skin & Hair LossSkin feels dry. Hair thinning, especially the outer eyebrows.
ConstipationSlow digestion, infrequent bowel movements.
Depression & Low MoodOften misdiagnosed and treated with antidepressants.
Joint AchesStiffness, particularly in the morning.
Swelling & PuffinessParticularly in the face, eyes, hands, and feet.
Common Questions

Thyroid Treatment FAQs

What's reverse T3 and why does it matter?+
Your body makes T4, then converts it to T3 (the active hormone). But under chronic stress, illness, or nutrient deficiency, it can preferentially convert T4 to reverse T3 — a near-identical molecule that blocks the T3 receptor without activating it. The result: your TSH and T4 look "normal," but you have hypothyroid symptoms because reverse T3 is competing with active T3 at the receptor level. Most doctors never test for it.
Can I have a thyroid problem if my TSH is normal?+
Absolutely. TSH is one of many markers and on its own is not sufficient. You can have low free T3, elevated reverse T3, autoimmune thyroid antibodies, or impaired T4-to-T3 conversion — all while TSH looks normal. A truly comprehensive evaluation looks at the whole picture, not one number.
What about Hashimoto's? My doctor never tested antibodies.+
Hashimoto's thyroiditis is the most common cause of hypothyroidism in the U.S., and TPO/thyroglobulin antibodies will often be elevated for years before TSH moves out of range. Skipping the antibody test means missing autoimmune thyroid disease at the early stage where it's most treatable. Dr. Dubroff routinely orders thyroid antibodies as part of a comprehensive evaluation.
What thyroid medications do you use?+
Dr. Dubroff prescribes the right medication for your specific thyroid pattern — which may include levothyroxine (T4-only), liothyronine (T3-only), combination T4/T3 protocols, or natural desiccated thyroid (NDT) such as Armour or compounded options. The choice depends on what your labs and symptoms show, not a one-size-fits-all default.
I'm already on Synthroid but still don't feel right.+
This is extremely common. Many patients on Synthroid (T4-only) don't convert it efficiently to T3 — the active hormone — and continue to have hypothyroid symptoms despite a normal TSH. Adding T3 or switching to a combination medication often resolves this. Comprehensive testing identifies whether you're a poor converter and points to the right adjustment.
How does stress affect the thyroid?+
Chronic stress raises cortisol, which directly suppresses the conversion of T4 to T3 and increases reverse T3 production. This is why so many people with adrenal/cortisol dysregulation also have functional hypothyroid symptoms — the systems are linked. Treating thyroid without also addressing adrenal function rarely produces complete resolution.
Can thyroid issues affect weight?+
Yes — significantly. Hypothyroidism slows metabolism, reduces energy, increases fluid retention, and changes body composition. Many patients lose 10-20+ pounds over several months once their thyroid is properly optimized — not from a weight-loss program, but from their metabolism being able to function normally again.
Get Started

Stop Being Told "Everything Looks Fine."

Book a free consultation. Dr. Dubroff will tell you what a comprehensive thyroid panel actually looks like — and order the labs your previous doctor missed.

Book Free Consultation Call 949-444-0583