Fatigue and a Slow Thyroid
A Slow Thyroid vs. Hypothyroidism
This page is for adults who are always tired and cold despite "normal" labs.
We treat thyroid problems and fatigue by telehealth across Washington and Idaho. Our clinic is in Spokane.
These are not the same. Hypothyroidism is a diagnosis. Your lab numbers crossed a line most doctors call "disease." You get a prescription. A slow, or hypofunctioning, thyroid is different. It is not doing its job well, but your numbers have not crossed that line. Your labs may be called "normal." You still feel awful. Many people live in this gap for years. We do not stop at the label. We look at how your thyroid really works and how you really feel.
Signs Your Thyroid May Be Slow
Your thyroid sets the speed of your whole body. When it runs slow, everything runs slow. Feeling cold is one of the biggest clues. Cold hands and feet are often the first sign. Other common signs:
- Deep tiredness that sleep does not fix
- Weight gain even when you eat well
- Brain fog and trouble finding words
- Thinning hair or hair loss
- Dry skin
- Constipation
- Low mood
- Heavy or irregular periods
- Slow heart rate
- Puffy face
- Muscle aches
- Higher cholesterol
Feeling cold all the time is not just how you are built. It is a sign worth checking.
Why We Always Measure Free T3
Most doctors check only TSH. But TSH is not a thyroid hormone. It is a signal from your brain telling the thyroid to work harder. It says little about how much active hormone reaches your cells.
Your thyroid mostly makes T4, a storage form. Your body must turn T4 into T3. T3 is the active hormone. It gives your cells energy and warmth. Some people do not convert T4 to T3 well. Stress, inflammation, gut problems, low iron, and low selenium can block that step. Then TSH and T4 look fine while Free T3 sits low. You feel terrible. So we measure Free T3 every time. We also check Free T4, reverse T3, and thyroid antibodies. If you only look at TSH, you miss this.
"Normal" Is Not Optimal
The "normal" range on a lab report is not a healthy range. It is a statistical range from the people tested at that lab. Many of them were sick, stressed, or headed toward thyroid disease. Optimal is different. It is the level where people feel good and their body works well.
A lab may call TSH up to about 4.5 normal. Most people feel best with TSH closer to 1 to 2. Free T3 at the bottom of the range often means feeling tired and cold. Many patients feel best in the upper part of the range. Two people can have the same "normal" report. One feels fine. The other cannot get off the couch. We treat you, not the number.
When Levothyroxine Is Not Enough
Levothyroxine (Synthroid) is the standard treatment. It works well for many people. But many patients take it faithfully and see a "perfect" TSH. They still feel tired, cold, foggy, and heavy. If that is you, you are not imagining it. You are not failing.
Levothyroxine is pure T4, the storage hormone. It assumes your body will convert it to T3. Poor converters can take plenty of T4 and still have low Free T3. Your TSH looks great, but your body never got the active hormone.
Sometimes the dose is not the problem. The real cause can be one of these:
- Hashimoto's autoimmunity
- Low iron or ferritin
- Low selenium or zinc
- Poor gut absorption
- High stress and cortisol
- High reverse T3
We look for the real reason. Options include fixing nutrients or calming autoimmunity. We may change how and when you take your medicine. We may add T3 or try a different thyroid medication. There is more than one path.
How Evergreen Med Helps
We start with a full thyroid panel, not just TSH. We check TSH, Free T4, Free T3, reverse T3, and thyroid antibodies. We also test the nutrients your thyroid needs: iron, ferritin, selenium, zinc, and vitamin D. We read those numbers against optimal ranges and against how you feel. Then we build a plan that fits you. We check in every week until your symptoms improve.
You should not have to prove you are sick before someone helps you. If you are tired all the time and cannot get warm, let's find out why.
This page is for education only. It is not a substitute for personal medical advice, diagnosis, or treatment.
Are We the Right Fit for You?
Schedule a free 15-minute call with a clinician. We serve adults in Washington and Idaho by telehealth.
Call or Text 509-720-6314 Email Care@evergreenmed.health