Iodine

Iodine is an essential trace mineral that your body needs to make thyroid hormones, which are vital for regulating metabolism, energy, and normal growth. People use iodine supplements to support thyroid health, especially if they do not get enough from food sources like seafood, dairy, or iodized salt.

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Iodine

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Ingredient guide

Iodine

What it is: Iodine is an essential trace mineral found in seawater, certain soils, and a variety of foods. It is a basic chemical element required for the production of thyroid hormones.
What it does: Iodine is necessary for your thyroid gland to produce the hormones thyroxine (T4) and triiodothyronine (T3), which regulate metabolism, energy use, growth, and brain development.
How it is used: Iodine supplements are most often used to support thyroid function, metabolic health, and proper development, especially in people whose diets lack sufficient iodine.
Natural sources and supplement forms: Naturally abundant in seaweed, fish, shellfish, dairy, eggs, and iodized salt. Supplements may use potassium iodide, sodium iodide, or kelp extracts.
Why it appears in supplement formulas: Iodine is included to promote healthy thyroid function and help prevent deficiency in populations at risk, such as those avoiding seafood or iodized salt.
What to know before use: High intake can disrupt thyroid health; people with thyroid conditions or who use thyroid medication should consult a healthcare provider before taking iodine supplements.

Interesting Fact

Iodine: The Ocean Mineral Behind Table Salt

Iodine is a trace mineral naturally found in seaweed and ocean fish, and it's also what makes iodized table salt a key source for many people. Your body needs iodine in small amounts to help make thyroid hormones, which support basic cell functions. Most diets get iodine from dairy, seafood, and foods prepared with iodized salt.

FAQ

Common questions about Iodine

FAQ

Frequently Asked Questions About Iodine

What does iodine do in the body?

Iodine is critical for producing thyroid hormones, which help regulate metabolism, energy use, and normal growth and development. Without enough iodine, the thyroid gland cannot function properly, which can disrupt many bodily processes. Dietary iodine ensures that thyroid hormone levels remain in a healthy range.

What are the main natural sources of iodine in the diet?

Natural sources of iodine include seaweed, ocean fish, dairy products, eggs, and iodized table salt. Seaweed tends to have the highest concentrations, while levels in other foods can vary based on soil and farming practices. In areas where iodine intake from food is low, iodized salt is a major dietary source.

What forms of iodine are used in supplements?

Common forms of iodine in supplements include potassium iodide, sodium iodide, and kelp-based preparations. Potassium iodide is widely used because it is stable and easily absorbed, while kelp offers a natural source of iodine derived from seaweed. These forms help ensure consistent iodine intake when dietary sources may be insufficient.

Are there any safety concerns with taking iodine supplements?

Excessive intake of iodine from supplements can disrupt normal thyroid function and may be risky for people with certain thyroid conditions. It’s important to use iodine supplements within recommended guidelines and consult a healthcare provider before use, especially for individuals with diagnosed thyroid disorders or those taking thyroid medications.