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Low T3 and T4

Learn how your low levels of T3 & T4 can affect your thyroid.
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What women over 50 should know about their hormones

Women who are over the age of 50 are more likely to develop hypothyroid disorders.

Hypothyroidism is when your thyroid gland is not producing enough hormones needed in your body. Hypothyroid disorders, if untreated, may cause many health problems like:

  • Joint pain
  • Infertility
  • Obesity
  • and heart disease.

There are reliable tests that can be taken in order to determine the levels of T3 & T4 being produced within your body.

Synthetic thyroid medications can be taken to help replace any lost hormones. They are safe and easy to take and once your dosage is established properly you will need to stay on your medications until your physician changes your prescription.

What are T3 and T4 hormones

Triiodothyronine (known as T3) and Tetraiodothyronine (known as T4) are hormones produced by the thyroid gland.

The gland is a butterfly-shaped gland positioned in the front of your neck just under your voice box.

These hormones influence and allow your body's metabolism to function properly. The amount of T3 and T4 that is produced in your system is governed by the pituitary gland which produces thyroid-stimulating hormones.

TSH controls the amount of T3 and T4 the thyroid produces. Thyroid-stimulating hormones will produce more stimulants so your body will increase the T3 and T4 hormone levels in your system. If you have hypothyroid disorders, it means your thyroid gland is not producing enough thyroid hormones for your metabolism.

Normal T3 and T4 levels:

Iodine is used by the thyroid gland to make thyroxin, which is T4, and to make Triiodothyronine, which is T3. Laboratory blood tests will establish the amount of serum T3 and T4 levels are in your system.

Levels are measured by deciliters.

Your T4 range should be between 5-13.5 micrograms and your T3 should be 0.1-0.2 micrograms per deciliters.

If your T4 level is lower then 5 and your T3 is lower then 0.1 then it may indicate Hashimoto’s disease or hypothyroidism.

A radioimmunoassay (RIA) test may be ordered by your physician to check the T4 level in your blood. Another test that would help to determine thyroid problems is the thyroid-stimulating hormone test.

Low levels of hormones may cause an underactive thyroid. If you are on any medications or taking Estrogen, then other tests will have to be run in order to determine your proper levels. The combination of tests will give your physician a better understanding of your thyroid levels to see if you have any abnormalities in your hormone functions.

Low levels of T4 may indicate a few things:

  1. It could mean that your pituitary gland is not functioning properly in signaling the thyroid gland to produce more T3 and T4 hormones. Some hypothyroid disorders may be caused by the mal-functioning of the pituitary gland.

  2. Abnormal T3 and T4 readings may be caused by to much or to little protein globulin in your body. Protein can falsely increase or lower your T4 level which gives a misdiagnosis of your symptoms.

T4 is converted to T3 hormones by the body naturally, but sometimes the body is unable to make this conversion. When your body does not covet T4 hormones to T3 hormones you could become deficient in thyroid hormones. If you are experiencing any hypothyroid disorders, your doctor should check both the T3 and T4 levels.

The active form of hormone is the T3 and doctors pay close attention to this level.

T4 is converted to T3 hormones by the body naturally, but sometimes the body is unable to make this conversion. When your body does not covet T4 hormones to T3 hormones you could become deficient in thyroid hormones. If you are experiencing any hypothyroid disorders your doctor should check both the T3 and T4 levels of hormones.

Symptoms of Low T3 and T4 levels may include the following:

  • Fatigue and Headaches
  • Weight gain and Constipation
  • Numbness in hands and fingers
  • Dementia, confusion, or depression

Hypothyroidism may cause serious health problems if not taken care of by professional doctors.

There are other symptoms that may occur over time that people should be aware of in order to talk to their doctors about their concerns. Some of the other symptoms may be a slow pulse or speech, hoarse voice, and scaly, dry skin.

Low levels of T3 and T4 hormones may cause your metabolism to slow down which will affect your eating habits and body temperature.

How to boost your T3 and T4 levels

Your physician can give you a synthetic thyroid hormone, like synthroid or levoxyl, to help regulate thyroid hormones in your system.

Herbs, a proper diet, and thyroid medication are all viable solutions. Thyroid treatments may also include taking aspirin to relieve the inflammation and pain. In severe cases of inflammation your physician may suggest a stronger medication like prednisone or dexamethasone. In rare cases it may be suggested that a partial removal of your thyroid would be necessary.

Foods and Supplements to Consider:

  • Foods with high vitamin B and iron, such as fresh vegetables and whole grains
  • Fruits and vegetables high in antioxidants, such as cherries, blueberries, tomatoes, squash and bell peppers
  • Zinc (used in our hypothyroid remedy) is necessary for the thyroid to manufacture hormones.
  • Selenium and Iodine (when given together) have shown to help an underactive thyroid.

Before taking any Herbs for low hormone functions you should consult with your doctor. There are also many foods you need to avoid such as, broccoli, cauliflower, kale, soybeans, nuts and many others that may inhibit your thyroid from producing necessary hormones.

Daily exercise will help improve your system

You get the most benefits out of exercising when performing aerobic exercises at 70 percent of your maximum heart rate.

This will dramatically raise your T3 and T4 levels. People who pushed their exercise routines to maximums of 90 percent of their heart rate have found that their T3 levels would fall.

One study showed that women who were not athletes and exercised had a higher T3 levels when they stopped their routines.

The women who were athlete’s and pushed their exercise routine to where they burned up more calories than they consumed had a lower T3 level reading after they stopped their routine.

Exercising increases the function of your thyroid and stimulates the thyroid to produce more hormones.

Your body tissues then become more receptive to the increased thyroid hormones produced while exercising and your T3, T4 levels increase.

Brain chemistry is affected by your thyroid hormones. Thyroid hormones tell you if you are hungry, or full.

Serotonin levels are lowered by Hypothyroidism. The feel good hormone serotonin is not released from the brain if your T3 and T4 levels are low. Exercising will help your body to adjust the chemicals in your body to a more normal level and increase your T3 and T4 levels.

Your goal should be to set up a fitness routine that you do 5 days a week for at least 60 minutes.

Stress and Depression from T3/T4 Imbalances

Physicians are finding in patients who come in stressed out or depressed have T4/T3 imbalances.

This type of depression and stress can be treated by taking both the T3 and T4 thyroid medications.

A blood test called TSH can be ordered to see if they are getting the right dose of T4. Usually a physician will cut the T4 medication in half and add T3 medication at a low dosage.

T3 is added at a very low dosage because if you add a larger dose it could cause blood clots, irregular heart beats, shakiness, and in some cases osteoporosis. Patients return in thirty days for another TSH and blood tests to check for the T3 level of hormones in their system.

Physicians can also give a patient a prescription to raise the level of serotonin with T3 hormones as an additive for maximum results.

Weight Loss & T3/T4

Thyroid hormones play a big part in your bodies metabolism. The effectiveness of how well your T3 and T4 hormones are in balance will help in the loss of weight. The hormone T3 burns fat five times as fast as T4.

Both thyroid hormones T3 and T4 must be working properly for you to have maximum weight loss.

Many people feel experiment with taking all carbohydrates out of their diet in an effort to lose weight faster.

However, by taking all carbohydrates out of your diet, you are lowing your T3 hormone levels. As soon as you go back to eating carbohydrates, the weight comes right back on. A better way would be to eat sensible carbohydrates found in fruits and vegetables.

Keeping your T3 and T4 hormones in balance, eating properly and exercising will help you to lose weight.

Next Article: Symptoms of a Sluggish Thyroid


Thyax is a natural thyroid remedy that can help stimulate thyroid hormone levels naturally. Boost low levels of T3 and T4 to restore your thyroid function back to normal.