Tired, Cold, and Gaining Weight? Your Thyroid May Be the Culprit
You sleep eight hours but wake up exhausted. Your hair is thinning, your skin is dry, and the weight keeps creeping up despite eating carefully. You feel mentally sluggish, as if your brain is wading through fog. These are textbook symptoms of hypothyroidism – an underactive thyroid gland – and it is one of the most common yet underdiagnosed conditions I see at our practice in Zürich Seefeld.
As a general practitioner with a functional medicine perspective, I believe that standard thyroid screening often misses the full picture. A “normal” TSH does not always mean your thyroid is functioning optimally.
What Does the Thyroid Do?
Your thyroid gland, a small butterfly-shaped organ at the front of your neck, produces hormones (T4 and T3) that regulate virtually every cell in your body. Metabolism, energy production, body temperature, heart rate, mood, digestion, skin and hair health – all depend on adequate thyroid hormone levels. When production drops, everything slows down.
Common Symptoms of Hypothyroidism
The symptom spectrum is broad, which is why hypothyroidism is often mistaken for depression, ageing, or burnout. Key symptoms include persistent fatigue and low energy, unexplained weight gain or difficulty losing weight, feeling cold when others are comfortable, dry skin and brittle nails, hair loss (especially the outer third of the eyebrows), constipation, brain fog and poor concentration, depressed mood, muscle aches and joint stiffness, irregular or heavy menstrual periods, and elevated cholesterol.
Why Standard Testing Often Falls Short
Many doctors screen only TSH – and if it falls within the laboratory reference range, the thyroid is declared “normal.” But the reference range is broad, and what is statistically normal is not necessarily optimal for you. Additionally, TSH alone does not tell us how well your body converts T4 to the active hormone T3, whether thyroid antibodies are present (indicating autoimmune thyroiditis), or whether your cells are actually responding to thyroid hormones.
Our Comprehensive Thyroid Assessment
At our practice, I run a complete thyroid panel: TSH, free T4, free T3, reverse T3, and thyroid antibodies (TPO and thyroglobulin). I also assess nutrients critical for thyroid function – iron, ferritin, selenium, zinc, vitamin D, and iodine. This comprehensive approach reveals subclinical hypothyroidism and autoimmune thyroiditis (Hashimoto’s) that standard screening misses.
What We Do: Treating the Whole Picture
Optimise thyroid hormone levels: If replacement therapy is indicated, I work to find the right preparation and dose for you. Some patients do well on levothyroxine (T4) alone, while others benefit from combination therapy with T3 or desiccated thyroid extract.
Address Hashimoto’s: If autoimmune thyroiditis is the underlying cause, simply replacing hormones is not enough. We need to address the immune dysregulation – through gluten evaluation, gut health optimisation, selenium supplementation, and stress management.
Correct nutrient deficiencies: Iron, selenium, zinc, and vitamin D are all essential cofactors for thyroid hormone production and conversion. Deficiencies in any of these can impair thyroid function even when hormone levels appear adequate.
Support the gut-thyroid connection: Gut health directly impacts thyroid function through nutrient absorption, immune regulation, and the conversion of T4 to T3. Approximately 20% of T4-to-T3 conversion occurs in the gut.
Lifestyle optimisation: Stress management, adequate sleep, appropriate exercise, and reducing environmental toxin exposure all support thyroid health.
Conclusion
If you have symptoms of hypothyroidism but have been told your thyroid is “fine,” it may be time for a more thorough evaluation. A comprehensive thyroid panel combined with a functional medicine approach can uncover the full picture and guide truly effective treatment. Book a consultation at our practice in Zürich Seefeld – your thyroid deserves more than a single TSH test.
