Why a normal thyroid test can still miss something
An endocrinologist on what TSH doesn't tell you
Levels <[email protected]>
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Levels promotes an interview with Dr. Angela Mazza, an integrative endocrinologist, to dispel common thyroid myths and provide a deeper understanding of thyroid health. The campaign highlights five key takeaways to help individuals better comprehend their thyroid test results and treatment options. It aims to educate readers on the complexities of thyroid health and the importance of considering multiple factors beyond standard test results.
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Why a normal thyroid test can still miss something
Six thyroid myths an endocrinologist wants to retire
Your thyroid is small, but the hormones it makes help set the pace of metabolism in nearly every cell in your body. When it's off, the symptoms tend to be vague and easy to blame on something else: fatigue, brain fog, weight changes, thinning hair. That's part of why thyroid problems so often go unrecognized, and why so much confusing advice circulates about them. Dr. Angela Mazza, an integrative endocrinologist who has spent 15 years treating thyroid patients, sat down with us on A Whole New Level to separate what the evidence supports from the myths she sees keeping people stuck.
Button Understand your test results →
Five Key Takeaways
1. TSH is a screening test, not the full picture.
It's an indirect signal from your brain telling your thyroid to work harder or ease off. If your TSH is normal but you still feel off, free T4, free T3, and thyroid antibodies can reveal problems it misses, including early Hashimoto's.
2. "Subclinical" doesn't mean fine.
The label usually describes a mildly high TSH (roughly 4 to 10) with normal T4 and T3. Dr. Mazza avoids the term because it ignores how the person actually feels, which can lead to years of waiting and watching.
3. Thyroid medication isn't a weight-loss switch.
Getting your levels in balance matters, but weight is also shaped by insulin resistance, cortisol, sleep, and stress. Expect to work on those too.
4. Standard treatment doesn't work equally well for everyone.
Levothyroxine is T4, which your body has to convert into active T3. Dr. Mazza estimates about 15% of people have genetic variations that impair that conversion and may do better on treatment that includes T3.
5. Your thyroid depends on nutrients and on your other hormones.
Iron, iodine, selenium, zinc, and magnesium all play a role, and an unaddressed cortisol problem can make thyroid treatment ineffective. For selenium, two Brazil nuts a day is often enough.
Button Read the full Conversation →
Looking to understand more about your metabolic health?
Explore our health news and advice site, Metabolic Insights
228 Park Ave South, PMB 63877, New York, NY 10003
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