Do Potatoes Contain Iodine

When it comes to healthy eating, people often wonder if potatoes are a good source of iodine. Iodine is an essential mineral that plays an important role in thyroid function and overall health. While some foods naturally contain iodine, others may not have significant amounts.

According to Memorial Sloan Kettering Cancer Center, only a few foods naturally have iodine in them, such as seaweed, dairy, and some fish. However, potatoes can also be a source of iodine. One medium-baked potato contains up to 40% of the recommended daily iodine intake, making it a good option for those looking to increase their iodine intake.

It’s important to note that the amount of iodine in potatoes can vary depending on the soil in which they were grown. Some regions have soil that is naturally rich in iodine, while others may have lower levels. Additionally, the cooking method can also affect the iodine content. Boiling potatoes can cause some of the iodine to leach out into the water, while baking or roasting can help retain more of the iodine content.

Iodine and Its Importance

The human body needs several nutrients to function correctly, and iodine is one of them. Iodine is a trace mineral that is essential for the proper functioning of the thyroid gland, which is responsible for regulating the body’s metabolism.

What is Iodine?

Iodine is a chemical element that is found in small amounts in the earth’s crust and seawater. It is an essential mineral that the body needs to produce thyroid hormones. The thyroid gland uses iodine to make two hormones, thyroxine and triiodothyronine, which regulate the body’s metabolism, growth, and development. The body cannot produce iodine, so it must be obtained through the diet.

Why is Iodine Important?

Iodine is critical for the proper functioning of the thyroid gland. Without enough iodine, the thyroid gland cannot produce enough thyroid hormones, which can lead to a condition called hypothyroidism. Hypothyroidism can cause a range of symptoms, including fatigue, weight gain, and depression.

On the other hand, consuming too much iodine can also be harmful. Excessive iodine intake can lead to hyperthyroidism, a condition in which the thyroid gland produces too much thyroid hormone. Hyperthyroidism can cause symptoms such as anxiety, weight loss, and rapid heartbeat.

It is important to consume the right amount of iodine to maintain proper thyroid function. The recommended daily intake of iodine is 150 micrograms for adults.

Now, the question arises, do potatoes have iodine in them?

According to various sources, potatoes are not a significant source of iodine. While iodine is absorbed by potato plant leaves during tuber growth, the amount of iodine in potatoes is relatively low. Other food sources of iodine include seaweed, dairy products, eggs, and saltwater fish.

Potatoes and Iodine

Do Potatoes Have Iodine?

Potatoes are a starchy root vegetable that is widely consumed in many parts of the world. They are a good source of carbohydrates, fiber, vitamins, and minerals. However, when it comes to iodine content, potatoes are not a significant source. Most of the iodine in our diet comes from iodized salt and seafood, such as fish and seaweed.

How Much Iodine is in Potatoes?

According to the United States Department of Agriculture (USDA), a medium-sized potato with skin (2.25-3.25 inches in diameter) contains about 60 micrograms of iodine. This is a relatively small amount compared to the recommended daily intake of iodine, which is 150 micrograms for most adults.

Iodine Content in Different Types of Potatoes

The iodine content in potatoes can vary depending on the type of potato and how it is prepared. Here is a table showing the iodine content in different types of potatoes:

Potato TypeIodine Content (mcg per medium potato)

As you can see, sweet potatoes have a much lower iodine content compared to other types of potatoes. This is because they do not absorb as much iodine from the soil as other vegetables.

In conclusion, while potatoes are a nutritious and versatile vegetable, they are not a significant source of iodine. It is important to consume iodine-rich foods, such as seafood and iodized salt, to meet your daily iodine requirements.


While potatoes are an excellent source of many essential vitamins and minerals, including vitamin C, potassium, and dietary fiber, they are not a significant source of iodine. According to Healthline, one medium-sized potato contains only about 2% of the recommended daily intake of iodine.

However, there are other foods that are much higher in iodine, such as seaweed, fish, dairy products, and iodized salt. If someone is concerned about their iodine intake, they may want to consider incorporating more of these foods into their diet.

It is also important to note that some people may need to limit their iodine intake, such as those with thyroid problems or those undergoing certain medical treatments. In these cases, a low-iodine diet may be recommended, which would involve avoiding high-iodine foods such as seaweed and iodized salt.

Overall, while potatoes may not be a significant source of iodine, they are still a nutritious and versatile food that can be enjoyed in a variety of ways. As with any food, it is important to consume them as part of a balanced diet that includes a variety of nutrient-rich foods.

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About the Author Adam

As a health and fitness writer, Adam combines his two passions—weightlifting and writing. With a creative writing degree under his belt, he spends his mornings lifting weights, his nights putting pen to paper, and eating too many snacks in between.

Health Disclaimer

  • Any products written about is not intended to diagnose, treat, cure, or prevent any disease.
  • Results may vary/may not be typical. 
  • This information does not constitute medical advice and it should not be relied upon as such. Consult with your doctor before modifying your regular medical regime.


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