Thyroid: why thyroid problems go undiagnosed for years.
Subclinical hypothyroidism affects up to 20% of women over 60. The standard test often misses it, because the threshold is set too high.
The thyroid is a butterfly shaped gland that sits at the base of your neck and produces hormones that regulate almost everything: metabolism, heart rate, body temperature, cholesterol levels, menstrual cycle, mood, and cognitive function. When it underperforms, even slightly, the effects spread across every system.
Subclinical hypothyroidism affects approximately 4 to 8% of adults in Italy, rising to 15 to 20% in women over 60. The standard screening test (TSH) often misses it entirely, because the threshold for flagging abnormality is set too high for the people who are most symptomatic.
What TSH measures, and what it misses.
TSH (thyroid stimulating hormone) is produced by the pituitary and tells the thyroid to make more hormone. A high TSH means the pituitary is working hard to get a sluggish thyroid to respond. Most Italian labs flag TSH as abnormal above 4.5 mIU/L.
The problem: research has established that TSH levels between 2.5 and 4.5 mIU/L are associated with increased cardiovascular risk, higher LDL cholesterol, and, particularly in women, symptoms that significantly reduce quality of life.
The median TSH in truly healthy people is around 1.5 mIU/L. A reading of 3.9 is technically "normal" but may be sitting in the symptom zone for many individuals, and nobody will investigate it.
Why it stays undiagnosed.
- Fatigue, often attributed to sleep problems, stress, or "life".
- Weight gain that doesn't respond to diet changes.
- Cold intolerance, always feeling colder than others in the room.
- Hair thinning and dry skin, often treated dermatologically rather than endocrinologically.
- Brain fog, slow thinking, poor memory.
- Elevated cholesterol. Hypothyroidism is one of the most common secondary causes of high LDL.
If you present with fatigue and elevated cholesterol, the typical response is dietary advice and possibly a statin prescription. If your TSH is 3.8, it might not even be mentioned.
What a complete thyroid panel looks like.
TSH alone is a screening tool, not a diagnosis. To understand thyroid function properly you need: TSH, free T4, free T3, and ideally anti TPO antibodies (to detect autoimmune thyroid disease, the most common cause of underfunction in women of reproductive age).
With Rosa, you get the full panel. Because TSH is just the headline. In health, the details matter.
