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Approximately twenty million Americans are affected by thyroid disorders, yet it's estimated that as many as sixty percent are unaware.  There are over 4,000 thyroid book results on Amazon and approximately 10,200,000 thyroid book results on Google in 2018.

Fatigue, weight gain, and low body temperature are symptoms of low levels of thyroid hormones (hypothyroidism) but are conditions such as high cholesterol, high or low blood pressure, anxiety, an inability to handle stress, insulin resistance, and brain fog also caused by hypothyroidism?  Why are lab results not an accurate measure of tissue thyroid levels, and often do not reflect hypothyroid symptoms?  How can you find the best physician and get the right tests?  How can you optimize lifestyle factors and treatment options to feel better and maintain your health while on thyroid hormone replacement?

Learn the answers to these questions from someone who is a scientist, understands physiology, and has searched the medical literature for answers.  There are many sources of misinformation about thyroid health, testing, and medication.

Zana Carver uses her own experience with thyroid cancer, thyroid hormone testing, and medication as well as her academic expertise to evaluate these questions.  In the “Breaking the Thyroid Code” series research on thyroid hormone testing and dysfunction is explained to get to the bottom of these pertinent and largely unanswered questions.


The author is a biology professor and scientist, not a physician or medical professional.  This informational site summarizes her personal experience as well as numerous research publications, articles, and books.  The information contained in Thyroidcode.org  is for educational purposes only and does not take the place of medical advice from a licensed physician.  This information cannot be used to diagnose or treat any condition, nor does it include all thyroid related information.  It is the patient’s responsibility to consult a doctor for treatment, diagnosis, and medication changes.  Any information followed without the supervision of a qualified physician is at the patient’s risk.  This website is not a substitute for medical advice.  The author, publisher, and Columbia Basin College are not liable or responsible for any loss, damage, or injury alleged to be caused directly or indirectly by the information contained herein.