If you find that you need iodine supplements due to hypothyroidism or a iodine deficiency during pregnancy when it is critical for fetal development, there are several factors you should consider when choosing one. It is important to choose a supplement that provides the right amount of iodine for you, and that it does not take you above the recommended daily allowance. Look for a high-quality product from a reputable company that follows strict production standards. Taking a supplement without additives and other artificial ingredients, as well as a coating that keeps it from dissolving too early during digestion, can help ensure you get the amount of iodine you are expecting. It is also typically a good idea to take iodine in combination with other vitamins and minerals.
Getting the correct amount of iodine is one of the most important considerations when choosing a supplement. Too much iodine can lead to a variety of physical problems including mouth sores, vomiting, and thyroid enlargement. Make sure to choose a supplement that does not exceed the recommended daily allowance, which in the United States is 150 mcg. You will also likely want to consult with your doctor for dosage recommendations before you start taking iodine supplements, particularly if you are pregnant, taking certain medications, or eat large amounts of certain foods such as tea and broccoli that can affect iodine absorption.
Another factor you should look at when choosing iodine supplements is the company that produces them. Standards for nutritional supplement quality are typically not regulated, so less reputable suppliers may not even provide the amount of iodine listed on the label. Look for a well-established company that follows good manufacturing practices (GMP) compliance, which are rigid pharmaceutical-level standards.
The best iodine supplements are typically made primarily from all-natural ingredients like kelp. Try to avoid ones that contain additives, fillers, and artificial ingredients including silica, sugar, and gluten. The one exception should be finding a tablet with an enteric coating, which will help ensure it is not dissolved until it reaches the upper intestine.
For the best results, iodine supplements should typically be taken in combination with other nutrients. Certain vitamins and minerals, such as selenium and vitamin A, are important for the body to properly absorb iodine. You should look for a multivitamin and mineral tablet that contains a wide variety of nutrients; not only will this ensure your body's optimal use of iodine, but can also contribute to overall health. The only exception should be if your doctor recommends iodine alone.