Supplement Ingredient Guide

Iodine

Iodine is a trace mineral essential for the production of thyroid hormones that regulate metabolism, energy, and overall growth. People use iodine supplements to help maintain normal thyroid function, especially if their diet lacks adequate seafood, dairy, or iodized salt.

Found in 18 listed products 2 related guides Uses, sources & safety

About Iodine

Read the ingredient guide

What is Iodine?

Iodine is an essential trace mineral and basic chemical element that the human body requires in small amounts, primarily for thyroid hormone synthesis.

What Iodine does and why it is used

Iodine enables the thyroid gland to produce hormones like thyroxine (T4) and triiodothyronine (T3), which are crucial for regulating metabolism, energy levels, growth, and neurological development. Iodine is commonly used to support thyroid health, metabolic balance, cognitive development, and in situations where dietary intake may be low due to limited consumption of marine foods or iodized salt.

Food sources and supplement forms

Naturally found in seaweed, fish, shellfish, dairy products, eggs, and fortified iodized salt. Supplements may contain potassium iodide, sodium iodide, or natural kelp extract.

Possible side effects and interactions

Excessive iodine intake can disrupt thyroid function; individuals with thyroid disorders or those taking thyroid medications should consult a healthcare professional before supplementing.

Common 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.