Hormonal output from the thyroid is regulated by thyroid-stimulating hormone (TSH) produced by the pituitary gland, which itself is regulated by thyrotropin-releasing hormone (TRH) produced by the hypothalamus.
When the thyroid is functioning normally, it produces just the right amount of T4 and T3 hormone to meet the body's needs. When there is a disorder with the thyroid it can present in two ways: hyperthyroidism, or overactive thyroid and overproduction of T4 and T3, or hypothyroidism, or underactive thyroid production of T4 and T3. In order to measure this, the blood is usually tested for the TSH produced by the pituitary gland. If the thyroid is not producing enough T4 and T3, the pituitary sends a signal to create more TSH in an attempt to jolt the thyroid into action and the blood test result would show an elevated TSH level (normal range is .5-5), this explains why your TSH is high when your thyroid function is actually low. Consequently, if your TSH blood level is low, that would indicated that your thyroid is overproducting T4 and T3 so the pituitary gland stops production of this chemical message that would have told the thyroid to produce more.
Signs & symptoms of hyperthyroidism may include:
- Increased heart rate
- Anxiety
- Weight loss
- Difficulty sleeping
- Tremors in the hands
- Weakness
- Diarrhea (sometimes)
- Light sensitivity, visual disturbances
- The eyes may be affected: puffiness around the eyes, dryness, irritation, and, in some cases, bulging of the eyes.
Symptoms of hypothyroidism may include:
- Weight gain
- Dry skin
- Constipation
- Cold intolerance
- Puffy skin
- Hair loss
- Fatigue
- Menstrual irregularity in women
Hashimoto's Thyroiditis (what I have, along with hypo) is an autoimmune disease where the immune system actually attempts to destroy the thyroid gland. With this condition, some people experience swings of hormone levels and a mix of all of the symptoms above. Celiac disease (damage of the lining of the small intestine and the inability to eat gluten) is sometimes the underlying cause of this disorder and can be mitigated by avoiding consumption of gluten foods.
Another condition that is often related to thyroid disease is adrenal fatigue, which is caused by an overstimulation and depletion of the adrenal hormones (often presents symptoms of exhaustion).
The common thread here is the endocrine system, which is composed of a series of glands that create hormones. Hormones are chemical messengers that send information from one group of cells to another, and are in charge of all of the functions of the body that happy slowly, such as cell growth, mood, and development. These hormones can be influenced by stress, fluid and mineral balance in blood, and infection. Ultimately, to treat your thyroid gland you need to consider and nourish the entire endocrine system by: limiting the body's stress response, keeping a calm state of mind regardless of the situation, keeping your mineral levels balanced by eating nutrient-dense foods, having a healthy physical and emotional lifestyle, and keeping your blood circulation optimal by staying hydrated and avoiding processed chemicalized foods.
When you see the doctor at Patients Medical, you will be tested for all of the necessary blood and hormone levels to show a complete picture that will help to diagnose you, but regardless of which disorder specifically you have there are some foods that are thyroid-nourishing and promote balance, and also those that disrupt proper function which you should avoid.
The following foods have isothiocyanates that can impair thyroid production by blocking chemical messages to thyroid cells. They are considered 'goitrogen foods' and you should avoid them (although the isothiocyanates in the cruciferous veggie family are neutralized by the heat of cooking, so they're ok to eat if cooked but I generally still don't eat them too often):
- Mustard
- Peanuts
- Any raw nuts (get them roasted, then they're good for you)
- Soy
- Broccoli
- Brussel Sprouts
- Cabbage
- Cauliflower
- Kale
- Rutabaga
- Turnips
- Radishes
- Millet
- Strawberries
- Peaches
- Pineapple
- Any foods you may suspect an allergy or sensitivity to
- Inflammatory foods (wheat, sugar, chemicals including pesticides found on non-organic veggies).
We have already talked soy about but I've recently listened to an in-depth lecture specifically on the dangers of soy to people suffering from thyroid imbalance, you have to completely avoid it! That includes vegetable oil (aka soybean oil, which is incredibly bad for everyone anyway) and many packaged foods that contain soy lecithin, soy protein, or anything else made with soy. What is ok, however, is fermented soy, such as miso soup. The fermentation process deactivates the isothiocyanates and estrogen-mimicking compounds contained in soy. Miso soup is nourishing and safe for you, especially since it also contains iodine-rich seaweed.
Foods that are nourishing for the thyroid:
- Iodine-containing whole foods (not iodized salt) such as seaweed and fish (snack on nori!)
- Natural fat from organic grass-fed animals (eat the chicken skin, butter, whole milk, etc.).
- Naturally made bone broth
- Veggies and fruits, excluding the ones mentioned above
I know that's a lot of information, so I encourage you to reread and let it process, do independent research and incorporate these endocrine-supporting recommendations into your diet and lifestyle.






