Hormone-Thyroid Connection

Testosterone is made in the testes and adrenal glands in a male, and in a woman, the ovaries and adrenal glands.  Testosterone is very important for metabolism.  It has been shown that low thyroid states result in low testosterone levels.  When the thyroid gland returns to optimal function in individuals with challenged thyroids, their testosterone levels also return to normal.  Testosterone replacement can help many conditions including thyroid and autoimmune diseases but simply giving these patients testosterone without correcting the reason why their testosterone is low in the first place does a great disservice to these patients in the long run. 

Testosterone replacement suppresses the pituitary hormone that signals the testes to make testosterone.  Once the patient comes off of the testosterone, one’s natural production may be suppressed resulting in dependence on the prescribing physician for continued hormone replacement.  There are a variety of factors that must be addressed before prescribing testosterone which should be done as a last resort.  It is very “sexy” in this day and age to get bioidentical hormones which are of course superior to synthetic hormones but still do not address underlying imbalances. 

The following must be addressed before commencing testosterone replacement:

  • Liver detoxification
  • Estrogen metabolism
  • GI microflora activity
  • Insulin sensitivity
  • Adrenal function
  • Testosterone synthesis
  • 5-alpha reductase activity(converts testosterone into dihydrotestosterone)
  • Beta-glucuronidase activity
  • 17,20 lyase activity–progesterone to androstenedione
  • Aromatase activity
  • Hypothalamic-Pituitary feedback loops

Progesterone is mainly produced during the second half of a woman’s menstrual cycle.  It is manufactured mainly in the ovaries and some in the adrenal glands in women.  In men, it is made in the adrenals and testes.  Progesterone enhances thyroid hormone function but a low thyroid can result in inadequate progesterone production.  Like all other hormones, progesterone should not be used for long periods of time and should be used in minimal doses.  Progesterone creams bypass the intestinal tract and liver which is more desirable than pills or sublingual drops.  Many women use progesterone cream based on symptoms which many times does more harm than good.  You should always have your hormone levels tested first before using hormone replacment.  Synthetic progesterone known as Provera, Depo-Provera, etc. has been shown to increase the risk of breast cancer by 800%.  Synthetic progesterone is not actually the progesterone that your body makes but a chemically-modified form of progesterone.

Estrogen is made in the ovaries in cycling women but the majority of estrogen in a menopausal woman is made in the adrenal gland. 

There are three types of estrogen:

  • Estrone or E1–10%
  • Estradiol or E2–10%
  • Estriol or E3–80%

The percentages indicate the amount that is naturally produced in the body.  Synthetic estrogens are given in very high doses of estrone or estradiol with little to no amount of estriol throwing off the natural balance of estrogen in a woman’s body.  This is one of the reasons why the Women’s Health Initiative was stopped before its completion due to the many side effects.

Estrogen is important for healthy bones, brain function, sex drive and function and may have a protective effect from heart disease.  As with any hormone, too much estrogen can have negative effects, especially an increased risk of breast cancer.  We are living in an estrogen-dominant world due to the many chemicals that act like estrogen known as xenoestrogens.

Elevated estrogen can be due to stress, diet, exposure to xenoestrogens and impaired hormone detoxification systems.  Stress will actually free inactive estrogen to active estrogen leading to side effects such as water retention, breast cysts, moodiness, and weight gain.  Conventional meat from animals injected with estrogen can be a problem as well.  The excess estrogen in the animals leads to weight gain from water retention increasing profits due to more money per pound.  Fiber, liver detoxification, stress reduction and the elimination of conventional dairy and meat in the diet will lower excess estrogen.

We know that excess estrogen can lead to low thyroid function.  The mechanism behind this is simply an inhibition of the conversion of inactive T4 into active T3 as well as estrogen binding to the proteins to which thyroid hormone would normally bind. 

Women who are taking synthetic estrogens such as Premarin, Prempro and the birth control pill will most likely have low thyroid function due to the excess estrogen.  Many times, cleansing the body of excess estrogen and ensuring proper estrogen metabolism in the liver can clear the symptoms of hypothyroidism. 
It is a very rare case where we will use estrogen in our practice due to the fact that correcting underlying physiology can normalize estrogen levels.  This is also true for post-menopausal women who usually have low estrogen due to concomitant adrenal fatigue.  When the adrenal glands are healthy in a post-menopausal woman, she will usually have adequate estrogen in her system.

Pregnenolone or “the mother of all hormones” is made from cholesterol mainly in the adrenal glands.  As its name suggests, it is the precursor to all of your sex hormones including testosterone, estrogen, progesterone, DHEA and cortisol.  Pregnenolone is found in its highest concentration in the brain and is important for memory and brain function.  Research has shown that those with low thyroid function also have low pregnenolone levels.  We use time-released pregnenolone in our patients with adrenal fatigue to rebuild the adrenal glands when they are exhausted.  Most of the pregnenolone taken will convert into cortisol which is good if the adrenal glands are exhausted and not producing enough cortisol.  Remember that too much cortisol inhibits thyroid function but on the flip side you need some cortisol to convert inactive T4 into active T3.  Patients tend to notice an instant increase in energy and memory and have an improved sense of well-being once they begin taking pregnenolone. 

DHEA is a steroid hormone produced in the adrenal gland.  There is plenty of research showing that patients with low DHEA levels also have low thyroid function.  Like pregnenolone, DHEA is given to our patients who have adrenal fatigue to rebuild the adrenals.  DHEA is not taken for long periods of time, however, as it can cause hormonal imbalances if not taken correctly.  DHEA has its own effects in the body including proper immune function, fat burning, muscle building, tissue repair, proper liver function and energy production.  DHEA will also convert into other sex hormones such as estrogen and testosterone.  When DHEA is given to a woman, it will most likely convert into testosterone but in a man it will most likely convert into estrogen.  DHEA received a lot of press as an anti-aging hormone which led to abuse of its over-the-counter availability.  DHEA should not be taken without proper testing first and it should be taken in the lowest dose possible. 

Cortisol is made in the adrenal gland to raise blood sugar into the normal range but chronic elevations of cortisol can lead to blood sugar problems.  Cortisol in high doses is a catabolic hormone meaning it breaks down the body’s tissues.  Cortisol also eats away at the area of the brain that is involved in memory known as the hippocampus.  Cortisol is also required for an adequate immune response to infection so if you have trouble recovering from infections you may have inadequate adrenal gland function.  Cortisol converts into cortisone which is your body’s natural anti-inflammatory.  Too much cortisol will suppress TSH (thyroid-stimulating hormone), inhibit the conversion of inactive T4 into active T3 and also directly block thyroid hormone receptors.  Cortisol is required, however, to convert inactive T4 into active T3 making it very important for proper thyroid hormone function.

The adrenal glands should nearly always be treated before the thyroid is treated due to the fact that too much thyroid hormone can make already fatigued adrenals even worse.  I have also found that once the adrenals are functioning optimally, many patients’ thyroid symptoms resolve indicating it was not a thyroid problem in the first place. 

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13 Responses to Hormone-Thyroid Connection

  1. jackie September 9, 2012 at 8:33 am #

    Any Dr’s you can recommend I go to. I have battled thryoid problems – hyper with multiple RAI until i was eventually hypo. Now – we still have trouble regulating. Have been given a host of “other” conditions, some being taken away (with no SORRY YOU TOOK UNNEEDED MEDS FOR SO LONG). I am of the opinion something else is creating the thyroid problems since its so inconsistent from days to days. And I am tired of being told mental or menopause. Though I am now in my low 40’s and menopause might be an issue soon – it wasn’t 10 years ago. Mental is definitely now an issue – but its a “side effect” of the main and no one wants to believe that either. I dont recall ever having my adrenals, thalmus, or other endo glands checked. Never recalled a “sex hormone” check. Shoot – they only did the A1C at my insistance after I complained of hypoglycemic symptoms for @ a year and decided that day – they would not dismiss me as mental. A1C showed” when” diabetes becomes official – then we’ll have to address diet, medicine, and life style changes.

  2. maria elliott November 13, 2012 at 12:28 pm #

    How does one now if she has adrenal fatigue?

  3. maria elliott November 13, 2012 at 12:31 pm #

    I have read that it is important to treat for hypothyroidism first before treating for low hormones/imbalance. I was recently tested and found to have low progesterone, testosterone, and estrogen (estradiol). Should I be treated for the hypothyroidism first and then retested for the hormones?

  4. Carrie January 27, 2013 at 10:40 pm #

    My daughter is 17 now but has been having issues with her thyroid since she was 13. For the last 3 years she has been dealing with fatigue, abdominal pain, extreme nausea before and after eating, infrequent vomiting, occasional headaches, feeling of nausea when riding in a car or moving at all, bloating, etc. She now feels it has something to do with her ovaries – that is now where she thinks the pain is coming from. It has been hard to regulate her thyroid, clear up to 323. She takes Synthroid once daily in the morning (trying to make sure she takes it 1-2 hours before eating). She has had her gallbladder out because of this at 15, 2 upper endoscopies looking in her stomach and 1 colonoscopy with no problems other than her gallbladder had adhesions underneath, per the doctor. Where do we go from here? OB ? Thyroid specialist said it is not her thyroid. Is there a specific doc for thyroid/ovaries? We have spent a fortune on tests and doctors to no avail. Help!!!!!!!!!!!!!!!!! Frustrated Mom

  5. carol February 18, 2013 at 10:27 pm #

    You and your daughter need to see a physician trained in functional medicine. Go to functionalmedicine.org and use the physician locator and read a bit about functional medicine. Functional medicine is all about getting to the root cause of the problem and not simply treating the symptoms or simply doing a tour of specialists who don’t provide any solutions. A functional medicine doctor will look at your daughter’s entire health history and perform a series of tests to get to the bottom of the dysfunction. Functional Medicine doctors are typically conventionally-trained MDs who have additional special training at the Functional Medicine Institute. Anyone who has a long term illness can benefit from Functional Medicine–I did. :)

  6. G September 16, 2014 at 9:36 am #

    After a tramatic event two and a half years ago, I suffered from severe PTSD for two years with constant severe panic attacks and constant adrenalin surges, as well as severe depression. All this happened right when I went off the pill after having been on it constantly since I was 16 years old, for 15 years. Two and a half years later, my PTSD and panic attacks have pretty much disappeared and I do not feel depressed anymore, but constantly feel irritable, moody, tired, grumpy, have headaches. My PMS is also very bad with very painful menstrual cramps and back pain. Since this all happened I also am suffering from severe reactive hypoglycemia. I have cut out all refined carbs, and sugars and have a healthy, high protein and high healthy fats diet with no processed foods. My blood-sugar levels drops every two hours with such severe symptoms that it is affecting my work and day-to-day life. How can I balance my hormones and get back to feeling normal since it seems as though all my homrones are out of balance? Also, I am 34, so am not going through menopause.

  7. Dr. Nikolas Hedberg September 16, 2014 at 9:39 am #

    Thanks for the comment. In order to get your hormones balanced you’ll need to work with a functional medicine doctor who can properly test all of your hormones.

  8. Bianca June 28, 2015 at 11:00 am #

    can you pls suggest a functional practitioner in Australia sydney. desperate pls…

  9. Dr. Nikolas Hedberg June 28, 2015 at 11:34 am #

    I am not aware of anyone in that area however we do have quite a few patients in Australia we work with through Skype.

  10. Courtney October 19, 2015 at 3:05 pm #

    I agree with the need to treat hormonal imbalances in conjunction with (or before) directly treating the thyroid. However, how does this change (if at all) when faced with autoimmune thyroid conditions (Hashimoto’s or Grave’s)? In your experience, does the rebalancing of hormones also help to suppress the immune system attack on the thyroid?

    Thank you for the article!

  11. Dr. Nikolas Hedberg October 19, 2015 at 3:07 pm #

    Elevated estrogen can exacerbate Hashimoto’s so it is important in that regard.

  12. Brigadoon December 12, 2015 at 2:37 pm #

    OK, So you are telling me that for years I took Permian and did great on it for years & because I still have my uterus my Dr. also gave me progestin (I took 4 mg of Premerin for 28 days & added the Progestin the last 5 days – Then he decided with the information that was given to ALLLLL Doctors that Permian was bad for women – so he took everyone off – (thank goodness I know how the body works & for yearsssss I have taken fresh bee pollen as well as Royal Jelly and made it through Menopause with NOT one down side. – However, AFTER menopause my skin on my whole body & face dehydrated (no one tells us that will happen) Now you’re saying the Hormone tests were not done correctly !!!!!! And I could have stayed on my Premerin & progestin and NOT be put through the “HELL” of dehydrated saggy wrinkled skin!!!! My God what have you doctors TAKEN AWAY from women!!

  13. Mg December 14, 2015 at 10:16 am #

    It’s been almost three weeks since I came off the T3 meds that were given to me for two weeks. I stopped because I suddenly started having heart palpitations, shaking, chest pressure and can’t sleep at all. Seems like it made me hyper so I can’t get an answer on why the symptoms are not going away after three weeks. I have been to a cardiologist who said my heart is fine so now what should be my next step because I’m miserable.

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