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ZRT Iodine Dried Urine Test Kit

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Product ID: 2552

Product Description

    • Tests for iodine status in dried urine
    • Only requires urine collection twice a day (first morning and last night void)
    • Result available in 5 to 7 business days
    • Effectively tracks iodine level during supplementation
    • Includes prepaid shipping label

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The iodine urine test offers a simple and convenient testing method to monitor an individual's iodine status in urine dried on a filter strip. Iodine deficiency and excessive iodine levels can both have negative impact to your health, including the development of goiter, hypothyroidism, acneiform eruption, and reduced mental function.

This at home urine test is also helpful in determining the effectiveness of iodine supplementation in an individual, as well as tracking treatment progress. It is easy to use and only requires urine collection on a filter strip 2 times a day (first morning and last night void), therefore, eliminating the inconvenient 24-hour collection of urine in a jug.

Collection of urine sample can be done either by dipping the strip in urine collected in a cup or by urinating directly on the strip. The urine-saturated filter strips must be dried overnight and sent to the laboratory for iodine and creatinine analysis. Your test result will be made available in 5 to 7 business days from the date your sample is received.

The comprehensive test report will include a graph showing where your hormone levels fall within set ranges; another graph detailing the symptoms you listed on your self-evaluation form; and individualized details of your hormone evaluation.

Iodine is a trace mineral that plays several important functions in the human body, such as controlling the metabolic rate, maintaining the energy levels, maintaining healthy reproductive system, and assisting in the process of programmed cell death. In adults, the recommended daily dietary intake of iodine is 150 micrograms, and 90-120 micrograms in children. For pregnant women, consumption of 200 micrograms per day is required for optimal production of thyroid hormone. The figures are approved by the World Health Organization (WHO), International Council for the Control of Iodine Deficiency Disorders (ICCIDD), UNICEF, Centers for Disease Control (CDC), and other international organizations that study iodine nutritional status of world populations.

Iodine is typically obtained from what you eat and drink. Among the various sources of iodine include iodized table salt, shellfish, sardines, tuna, oyster, salmon, cod, shrimp, sea bass, kelp, and seaweed. Dairy products also contain iodine, as well as plants grown in iodine-rich soil.

Goiter is not the only side effect of iodine deficiency. Other health problems that an iodine deficient individual may experience include dry skin, hair loss, fatigue and slowed reflexes. Iodine deficiency is said to be more prevalent in women than in men, and is more common in pregnant women and older children. Pregnant women that are iodine deficient are at greater risk of miscarriage, stillbirths, or giving birth to children with cretinism and severe neurological and developmental defects.

Iodine excess, on the other hand, can also bring some discomfort and illnesses, such as thyroid underactivity. Although the symptoms of iodine excess are not as severe as iodine deficiency, it's still considered undesirable and should be equally monitored.

One of the most effective way to keep track of your iodine level is through dried urine testing. At TestCountry, we offer the iodine dried urine test that allows for determination of iodine status based on CDC and WHO guidelines for thyroid sufficiency, as well as extrathyroidal sufficiency. It's convenient and easy to use for both patient and the health care provider.


Iodine quick facts


What is iodine?

Iodine is a mineral found in some foods.

What does it do for the human body?

The body needs iodine to make thyroid hormones, which control the body's metabolism and other important functions. The body also needs thyroid hormones for proper bone and brain development during pregnancy and infancy.

Who needs iodine the most?

Getting enough iodine is important for everyone, but it is especially critical for infants and women who are pregnant.

How much iodine does a person need?

The amount of iodine a person needs each day depends on a person's age. Average daily recommended amounts are listed below in micrograms (mcg).

Life Stage

Recommended Amount

Birth to 6 months

110 mcg

Infants 7-12 months

130 mcg

Children 1-8 years

90 mcg

Children 9-13 years

120 mcg

Teens 14-18 years

150 mcg


150 mcg

Pregnant teens and women

220 mcg

Breastfeeding teens and women

290 mcg


Where can a person get iodine from in their diet?


Iodine can be found occurring naturally in some foods but it is most commonly consumed in developed countries through iodized table salt.

Foods in which iodine can be found:

  • Seafood, including: fish, seaweed, shrimp, and other types of seafood.
  • Dairy products (such as milk, yoghurt, and cheese) and products made from grains (like breads and cereals).
  • Fruits and vegetables that were grown in iodine rich soil (although that is difficult to determine).
  • Iodized salt.


Where else can a person get dietary iodine?

Iodine is available in dietary supplements, usually in the form of potassium iodide or sodium iodide. Also, many multivitamin-mineral supplements contain iodine and dietary supplements of iodine-containing kelp (a seaweed) are also available.

Who is at risk for not getting enough iodine?

Most people in developed countries get enough iodine from the foods and beverages they consume. However, certain groups of people are more likely than others to have trouble getting enough iodine:

  • People who do not use iodized salt. Adding iodine to salt is the most widely used strategy to control iodine deficiency. About 70% of households worldwide use iodized salt.
  • Pregnant women. Women who are pregnant need about 50% more iodine than other women to provide enough iodine for their baby.
  • People living in regions with iodine-deficient soils and who eat mostly local foods. These soils produce crops that have low iodine levels. Among the regions with the most iodine-poor soil are mountainous areas, such as the Himalayas, the Alps, and the Andes regions, as well as river valleys in South and Southeast Asia.
  • People who get marginal amounts of iodine but who also eat foods containing goitrogens. Goitrogens are substances that interfere with the way the body uses iodine. They are present in some plant foods including soy, and cruciferous vegetables such as cabbage, broccoli, cauliflower and Brussels sprouts. For most people who get adequate amounts of iodine, eating reasonable amounts of foods containing goitrogens is not a concern.


What does iodine deficiency do to a person's body?

People who don't get enough iodine cannot make sufficient amounts of thyroid hormone. In pregnant women, severe iodine deficiency can permanently harm the fetus by causing stunted growth, mental retardation, and delayed sexual development. Less severe iodine deficiency can cause lower-than-average IQ in infants and children and decrease adults' ability to work and think clearly. Goiter, which is the technical term for an enlarged thyroid gland, is often the first visible sign of iodine deficiency.

How does iodine affect a person's health?

Scientists are continually studying iodine to understand how it affects health. Here are some examples of what this research has shown.

Fetal and infant development

Women who are pregnant or breastfeeding need to get enough iodine for their babies to grow and develop properly. Breastfed infants get iodine from breast milk. However, the iodine content of breast milk depends on how much iodine the mother gets.

To make adequate amounts of iodine available for proper fetal and infant development, several national and international groups have recommended that pregnant and breastfeeding women and infants take iodine supplements. The American Thyroid Association recommends that pregnant and breastfeeding women take prenatal vitamin/mineral supplements containing iodine (150 mcg/day).

Cognitive function during childhood

Severe iodine deficiency during childhood has harmful effects on the development of the brain and nervous system. Mild iodine deficiency might cause subtle problems with neurological development.

Giving iodine supplements to children with mild iodine deficiency improves their reasoning abilities and overall cognitive function. In children living in iodine-deficient areas, iodine supplements seem to improve both physical and mental development. More research is needed to fully understand the effects of mild iodine deficiency and of iodine supplements on cognitive function.

Fibrocystic breast disease

Although not harmful, fibrocystic breast disease causes lumpy, painful breasts. It mainly affects women of reproductive age but can also occur during menopause. Very high doses of iodine supplements might reduce the pain and other symptoms of fibrocystic breast disease, but more research is needed to definitively confirm this.

Radiation-induced thyroid cancer

Nuclear accidents can release radioactive iodine into the environment. This increases the risk of thyroid cancer in people who are exposed to the radioactive iodine, especially children. People with iodine deficiency who are exposed to radioactive iodine are especially at risk of developing thyroid cancer. Potassium iodide can be used as a thyroid-blocking agent to reduce the risk of thyroid cancer in radiation emergencies.

What happens if a person has too much iodine?


Getting high levels of iodine can, ironically, cause some of the same symptoms as iodine deficiency, including an enlarged thyroid gland, known as goiter. Too much iodine intake can also cause thyroid gland inflammation and thyroid cancer. Getting a very large single dose of iodine (several grams, for example) can cause burning of the mouth, throat, and stomach; fever; stomach pain; nausea; vomiting; diarrhea; weak pulse; and coma.

The safe upper limits for iodine are listed below. These levels do not apply to people who are taking iodine for medical reasons under the care of a doctor.

Life Stage

Upper Safe Limit

Birth to 12 months:

Not established

Children 1-3 years:

200 mcg

Children 4-8 years:

300 mcg

Children 9-13 years:

600 mcg

Teens 14-18 years:

900 mcg


1,100 mcg


How does iodine react with medication?

Iodine supplements can interact or interfere with medicines that you take. Here are some examples:

  • Iodine supplements might interact with anti-thyroid medications such as methimazole, which is used to treat hyperthyroidism. Taking high doses of iodine with anti-thyroid medications could cause your body to produce too little thyroid hormone.
  • Taking potassium iodide with medicines for high blood pressure known as ACE inhibitors could raise the amount of potassium in your blood to an unsafe level. ACE inhibitors include benazepril, lisinopril, and fosinopril.
  • The amount of potassium in your blood can also get too high if you take potassium iodide with potassium-sparing diuretics, such as spironolactone and amiloride.

A doctor, pharmacist, or other health care provider should be alerted about any dietary supplements and medicines you take. They can tell you if those dietary supplements might interact or interfere with your prescription or over-the-counter medicines or if the medicines might interfere with how your body absorbs, uses, or breaks down nutrients.



  1. Collect urine sample in a cup (not included) and dip the urine test strips on the specimen. You may also urinate directly on the test strip, whichever is more convenient for you.
  2. Allow the urine-saturated filter strips to dry overnight.
  3. Use the pre-paid shipping label included in the test kit to send the urine test strips to the lab.
  4. Wait for the result in 5-7 business days from the date the lab received your sample.

Ratings and Reviews

Reviews by other users:

"If you have any reason to suspect that your iodine levels might be low, this test is for you. I liked the fact that the test could be done at home. Going to a doctor’s office at my age is such a hassle that anything I can do in the privacy and comfort of my own home is great. The results were a little confusing to me but I’m sure they’re probably easy to understand for most people. I’m just a bit of a scatterbrain. "
"Easy to use test! Definitely recommended!"

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