Potassium Iodide



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Supplement Facts & Directions

Supplement Facts

Serving Size: 1.5 milligrams
Servings Per Container: Varies
Amount Per Serving % Daily Value*
Iodine 1.1 mg 765%

* Percent Daily Values are based on a 2,000 calorie diet.
† Daily Value Not Established
‡ These supplement facts may vary from the product you receive. Please call for exact numbers.

Other Ingredients: None


Free of: Added Sugar, Soy, Dairy, Yeast, Gluten, Corn & Additives.

Directions: As a dietary supplement, take 1.5 mg daily or as directed by a physician. An accurate gram weight scale is recommended. The safe upper limit of Iodine for adults is 1.1 mg daily.

Warning: Potassium Iodide is toxic, even fatal, in high amounts. If you are pregnant, nursing, taking any medications, or have any medical conditions consult your physician before use. Keep out of reach of children.

Product Details

What is Potassium Iodide?

French chemist Bernard Courtois discovered potassium iodide in 1811, and its historical medicinal use dates back as far as 1820. Iodine has 37 isotopes, all of which experience radioactive decay with the exception of iodine 127. Iodine 127 is the only stable and nonradioactive iodine isotope, and potassium iodide (KI) is an ion salt compound of that element. Iodine deficiency affects approximately two billion people worldwide, and it is the number one cause of preventable intellectual disabilities. Iodine deficiencies can also cause:

  • Thyroid problems, painful thyroid gland, or visible goiter
  • Dry skin
  • Memory problems and brain fog
  • Mental impairment in children*
  • Fatigue
  • Headaches
  • Cold intolerance or cold hands and feet
  • Shortness of breath or breathing difficulties while lying down
  • Depression
  • Hair loss

The populations most at risk for iodine deficiency include pregnant women, breastfeeding women, breastfed and weaning babies, vegans, and individuals following weight-loss diets that include pre-packaged branded foods.

*Maternal iodine deficiencies transfer to the fetus, which can cause reduced cognitive function. The severity corresponds to the degree of iodine deficiency.

What is Iodized Salt?

The richest iodine food sources are fish and seaweed. However, due to the prevalence of iodine deficiency, salt producers often iodize salt with potassium iodide or sodium iodide. Potassium iodide has an edge on sodium iodide, as it sustains blood iodine levels for longer. However, heat and humidity cause table salt to lose its iodine content rapidly.

Iodine Supplement Benefits

Potassium iodide consists of 76.45% iodine and 23.55% potassium by mass. Potassium plays an important role in human metabolism and is essential for proper muscle function, certain neurological mechanisms, and as an electrolyte. As an essential nutrient, humans need a continual dietary supply of iodine to maintain good health (see table below for the Recommended Dietary Allowance based on age). In the event of radiation exposure, potassium iodide can dramatically reduce thyroid uptake of radiation. It may also inhibit the accumulation of lead following exposure.

Iodine and Thyroid Health

Iodine plays a critical role in synthesizing the thyroid hormones thyroxine (T4) and triiodothyronine (T3). The numerical designations T4 and T3 reflect the number of iodine atoms contained in each hormone. If iodine levels are deficient, the pituitary gland increases the production of thyroid-stimulating hormone (TSH). Elevated TSH levels cause thyroid tissues to grow in an attempt to obtain more iodine. Over time, increased thyroid tissue can develop into a goiter. Thyroid hormones regulate multiple physiologic processes, such as adequate growth and development, metabolism, and reproductive functions. It also aids in the conversion of food to energy and the maintenance of body temperature.

Benefits of Iodine on Skin

One of potassium iodide’s oldest documented uses is to manage certain skin conditions. As far back as 1900, the medical community has used potassium iodide to manage fungal skin infections. Recent studies have confirmed potassium iodide’s antifungal properties. Potassium iodide may help soothe skin swelling and redness as well.

Potassium Iodide and Respiratory Health

Potassium iodide is an expectorant, as it helps individuals cough up phlegm by loosening mucus. As a syrup, it irritates the respiratory mucous membranes to encourage expectoration. Potassium iodide may help individuals with long-term lung problems aggravated by mucus.

Table 1: Recommended Dietary Allowance of Iodine Based on Age.

Age Iodine
Infants (7-12 months) Not Established
Children, 1-3 years 200 mcg/day
Children, 4-8 years 300 mcg/day
Children, 9-13 years 600 mcg/day
Teens, 14-18 years 900 mcg/day
Adults 1100 mcg/day

Iodine Side Effects

Iodine is an essential nutrient, but some individuals may experience mild side effects when taken at higher doses. These include nausea, itching skin, and vomiting. Individuals with thyroid problems or diseases shouldn’t take potassium iodide supplements without a doctor’s supervision. Individuals with certain autoimmune skin diseases shouldn’t take potassium iodide, as they may have an iodine sensitivity. Excessive doses of potassium iodide (more than 1000x the RDA) can cause acne, upset stomach, loss of appetite, rashes, and a metallic taste in the mouth. Consult with a physician before starting any new supplements.


Tested by Accredited 3rd Party Labs

PureBulk's supplements are tested by accredited third party labs in the USA to ensure their identity, purity and potency. To receive a copy of these test results or any other PureBulk supplement please fill out the COA request form found here.

*NOTE: These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

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