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The Connection Between Thyroid and Body Temperature

Updated: Jul 31, 2023

Hypothyroid and tired Man

Hypothyroidism is the most common type of thyroid disorder. It means your thyroid gland is underperforming. The job of the thyroid gland is to produce thyroid hormones which control how the body generates and uses energy. The thyroid hormones affect every cell and almost every organ in the body. When thyroid dysfunction happens, parts of the body's functions slow down and result in a slower metabolism [1]. An impaired metabolic efficiency is closely correlated to low body temperature, often seen in cases of obesity [2].

There are many symptoms of hypothyroidism; the common ones are stubborn weight gain, chronic fatigue, and migraine headaches. A huge percentage of these patients have low body temperatures that are below 98.6F degrees. Even though the method of measuring body temperature to evaluate thyroid function is not as common as it should be in the conventional world, it’s been getting more and more acknowledged in the whole medical community.

Based on Dr. Dennis Wilson, who has successfully used sustained-release T3-only protocol to treat his hypothyroid patients, oftentimes, when the patients get their temperatures corrected, they feel much better, and other thyroid-related symptoms also disappear.

On a side note, the following is a relatively more accurate way to measure body temperature for evaluating thyroid function based on Wilson’s Protocol [3]:

  • By mouth with an oral mercury-free thermometer

  • Every 3 hours

  • 3 times a day, starting 3 hours after waking

  • For several days (not the 3 days before the period in women since its higher) for diagnosis

Jenny Noland, MS, CNS, CNGS, CKNS, LDN, MBA

Functional Nutritionist in Eugene, Oregon

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  1. Landsberg, L., Young, J., Leonard, W., Linsenmeier, R., & Turek, F. (2009). Do the obese have lower body temperatures? A new look at a forgotten variable in energy balance. Retrieved April 28, 2020, from

  2. Gustafson, C. (2015, June). Denis Wilson, md: Low Body Temperature as an Indicator for Poor Expression of Thyroid Hormone. Retrieved April 28, 2020, from

  3. Check The Body Temperature. (n.d.). Retrieved April 28, 2020, from


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