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In this blog we are going to share with you why Red light therapy for Hashimoto Thyroiditis is so efficient, using the incredible results of a study published in July 2020 by a group of scientifics in Istanbul, Turkey.


  • What is Hashimoto’s?
  • Study Introduction
  • The Study Development
  • Study Results
  • Conclusion


What is Hashimoto’s?


Hashimoto’s thyroiditis, also known as HT, is both a B cell- and T cell-mediated, organ-specific autoimmune disease. It is caused by an autoimmune attack of the thyroid gland, and characterised by the presence of thyroid peroxidase antibodies (TPO Ab) and thyroglobulin antibodies.


We have to note that no current treatment for underlying pathological mechanisms is available for HT, and once diagnosed it requires long-term levothyroxine (LT4) treatment in most patients. 


Steroids or non steroid anti-inflammatory medication does not help in decreasing the destruction of the thyroid gland, and LT4 replacement + selenium supplementation may reduce TPO Ab levels in some patients.

In this difficult situation, red light therapy may be an alternative treatment option in HT. 

The light interacts with biological structures, improves anti-inflammatory responses and helps regeneration of tissues. In other words, red light therapy is shown to be effective in some autoimmune diseases, such as rheumatoid arthritis and Sjögren’s syndrome and it has also shown to improve triiodothyronine (T3) and thyroxine (T4) levels in animal studies, for instance.

red light therapy hashimoto's

For those who are not familiar with it, red light therapy is a noninvasive, low-risk procedure. Moreover, it does not contain any ionising radiation, it is very easy to perform and it also has a low cost. 

The aim of the study we are about to introduce, was to evaluate the effects of red light therapy on HT patients regarding thyroid functions, thyroid autoantibody levels, and decrease in hormone replacement needs.



Study Introduction


A selection of 350 patients with HT were selected for the study with a vast female dominance. 340 versus 10 men. The age of the subjects was approximately 37 with the youngest patient being 29 and the oldest 45.

We need to note that patients with other autoimmune diseases, thyroid nodules, history of radiation to the neck, and previous thyroid surgery or other diseases, which can interfere with the thyroid metabolism, were excluded from the study.

All patients were divided into two groups.

Group 1 received red light therapy and dietary supplementation including vitamin D, iron and selenium.

Group 2 received the dietary supplements only.

Patients’ needs for LT4 replacement levels, T3, T4, and TSH levels, T3/T4 ratio, and thyroid autoantibody levels were evaluated both prior and in the third month of the treatment.


Study Development


The light chosen for the study was an 850nm wavelength light.

In terms of exposure, the application of the light was made with the patient’s neck extended and right into the thyroid gland. Each application was 2 seconds long, and with the light perpendicular to the skin.

The patients had a total of 6 sessions, twice a day for a total of 3 days.

Since it was a low level laser light, no protection was required.


hashimoto thyroiditis study


Study Results


First of all, we need to mention that none of the patients experienced any side effects.

In Group 1, T3 levels, T3/T4 ratio, vitamin D, selenium, and iron levels increased significantly and TPO Ab and weekly l-thyroxine doses decreased significantly after treatment. 

In Group 2, T3/T4 ratio and T4 levels did not change significantly.

As we compare both groups, the increase in T3 levels and T3/T4 ratio was markedly superior in Group 1 (RLT group ). In addition, the decrease in TPO Ab levels was also significantly different between both groups. Hormone replacement needs were also significantly decreased in Group 1 compared with Group 2. 

Finally, according to the logistic regression analysis, red light therapy is 70 times more effective in increasing T3/T4 ratio and 15 times more effective in decreasing levothyroxine dosage than dietary supplementation alone.




The conclusion of the study is that results are encouraging and red light therapy seems to be very effective in increasing T3/T4 ratio and decreasing TPO Ab levels and weekly doses of LT4 replacement therapy. 

The anti-inflammatory properties of red light therapy are greatly responsible for these changes and also for the major improvements in HT-related symptoms of the patient.


If you are experiencing HT or any other thyroid related issue, we highly recommend you to give red light therapy a try.

All our lights contain the exact wavelength used in the study, 850nm (Except the Target Light 670)


To conclude, the best device for ease of use for HT, is our TARGET LIGHT 2.0 With a perfect size to place on your neck and the specific wavelengths that were used in the study (850nm).

Do not waste a minute another minute suffering with Hashimoto’s, improve your health now, simply by switching on a light!


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Check out other related blogs:

Red light therapy for aches and pains

RLT after surgery

Red Light Therapy for Eyes

RLT for Depression

Red light therapy for Hormone Optimisation


Source of information:

Impact of Photobiomodulation on T3/T4 Ratio and Quality of Life in Hashimoto Thyroiditis – ttps://


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