What Is Iodine Good For? These 8 Iodine Uses May Surprise You

You may have heard that iodine is vital for the endocrine system, including thyroid health and the reproductive system. You may also know that iodine can protect you if you ever become exposed to too much radiation. But did you know that there are dozens of other beneficial uses for iodine? From healthy hair to wound healing, iodine is a must-have mineral for every aspect of your health! Here are 8 iodine uses that may surprise you:

#1. Iodine Can Be Used as a Sterilizing Agent

Iodine is one of the best antiseptics around. Almost all sterilization products have some form of iodine in them. Iodine is amazing as a wound cleaner, gargle, surface cleaner, and even water purifier!

Most iodine-based sterilizing agents come as povidone-iodine, especially wound cleaners and gargles, since it has been proven to lower bacterial numbers.¹ Tetraglycine hydroperiodide, which comes in tablets, is the best for water sterilization. You should use these sparingly, however. This form of iodine has been known to actually lower thyroid function, so it is best to use tetraglycine hydroperiodide tablets in emergency situations only.²

#2. You Can Improve Eye Health with Iodine

Certain areas of the eye, like the cornea, retina, vitreous body, anterior chamber fluid, and lens,³ are also areas of concentration for iodine. This means that iodine can be very beneficial for eye health. According to studies, iodine supplementation can be useful for cataracts,⁴ glaucoma, dry eyes, eye infections,⁵ and UVB protection.

In addition, some studies have found that the eyes can be just as adversely affected by halide-derived chemicals, perchlorate, thiocyanate, and fluoroborate in particular,⁶ as the thyroid.

#3. Iodine Helps Strengthen Teeth and Gums

Iodine can even help to strengthen teeth and gums. In fact, iodine has been used in dental treatment for more than 150 years. It can kill bad bacteria in the mouth and prevent tooth decay.

Sufficient internal iodine stores are linked to healthy gums and teeth. As you may have guessed, the main link is the thyroid. Thyroid function relies on iodine.

Iodine deficiency can disrupt the endocrine system and affect oral health. Endocrine hormones regulate saliva production. Hormonal imbalance caused by iodine deficiency can lead to dry mouth,⁷ which greatly increases the risk for gum disease and cavities.

Finally, some experts have found a consistent link between low thyroid function⁸ and Dental Distress Syndrome (DDS).⁹ DDS occurs when dental issues and TMJ (often caused by teeth grinding or Bruxism) begin to affect the whole body. DDS is a relatively new concept that some dentists are beginning to accept. Theories of natural medicine, such as the Chinese Meridian System, have included addressing oral health in their protocols for thousands of years.

#4. Skin Becomes Healthier with Iodine

Every cell in the body needs iodine. It’s not surprising, then, that iodine is also necessary for healthy skin. In fact, iodine deficiency is one possible cause for acne, since hormone imbalance is often the key reason why rashes and other blemishes appear on the face.

Iodine has also been shown to delay wrinkles and other signs of aging. It can speed up the healing of surface-level cuts and scars. And according to a report published in the Annals of Thoracic Surgery, ¹⁰ it can also slow or even halt bacterial infections like staphylococcal infections on the skin.

#5. Iodine Helps Prevent Hair Loss

Along with essential minerals like magnesium and zinc, iodine is vital for healthy tissue growth and development, which is why many experts consider iodine one of the best hair-regrowth substances.

In fact, according to many studies, hair loss (alopecia) is often a major sign of hypothyroidism and possible iodine deficiency.

A report published over 40 years ago in the Archives of Dermatology found that the percentage of telogen hairs on the scalp (hairs in the last stage of growth, when follicles weaken and prepare to fall out) increases as thyroid hormone levels decrease.¹¹ However, a more recent study in 2001 found that individuals with alopecia were able to regrow their hair with added iodine supplementation.¹²

#6. Iodine Keeps Your Mind Sharp

We’ve covered this in other articles, but it bears repeating. Enough iodine in your system every day is absolutely essential for cognitive health. Major signs of deficiency include:

• Brain fog
• Poor memory
• Depression and/or anxiety
• Mental fatigue

According to the World Health Organization, “Iodine-deficient people may forfeit 15 IQ points, and nearly 50 million people suffer from some degree of iodine deficiency-related brain damage.”¹³

Why is iodine so important for the brain? Again, it comes back to the thyroid and thyroid hormones. In large tissue areas such as the brain and liver, the thyroid hormone thyroxine (T4) is abundant. These areas are where T4 is converted to T3 (triiodothyronine). Another key element of this conversion is selenium-containing enzymes, according to the Linus Pauling Institute at Oregon State University.¹⁴

#7. Iodine Protects Children’s Health

Kids need iodine too, especially for their developing bodies and brains. In some parts of the world, major iodine deficiency is one of the main causes of cognitive impairment in children, according to the WHO. But even mild deficiency (also called “subclinical deficiency”) can affect developing neurological pathways, say the researchers of a recent study from New Zealand.¹⁵

Talk to a holistic health professional to find out whether supplementation is right for your child.

And remember that iodine is essential for pregnant women. In fact, a 2006 study found that iodine deficiency during pregnancy may be linked to autism.¹⁶ The link between iodine and healthy pregnancy is why the National Institutes of Health¹⁷ recommends higher-than-normal iodine intake levels for women who plan on getting pregnant or who are currently pregnant. Still, according to the American Academy of Pediatrics, roughly one-third of pregnant women in the United States remain iodine deficient throughout their pregnancy.¹⁸ This can have devastating health consequences for both mother and baby.

#8. Pets Need Iodine, Too!

And don’t forget your furry friends! Pets use iodine too and need adequate stores to stay healthy. Dogs and cats are exposed to the same chemical threats as their owners in today’s toxic world. Getting enough iodine supports their metabolism and thyroid health. And, as in humans, deficiency can lead to thyroid issues and a cascade of consequences.

According to the American Thyroid Association,¹⁹ about 12% of the American population will develop some form of thyroid condition, mostly in the form of “hypothyroidism.” At the same time, the National Institutes of Health estimate that approximately a third of American women between 25 and 44 report having symptoms of uterine fibroid tumors;²⁰ some experts state that the number may be as high as 80%.²¹ Iodine deficiency is also common in women with breast cancer, since the mammary glands also depend on iodine.

Now you know that iodine is responsible for more than just thyroid and reproductive health. But the body doesn’t make iodine on its own. It must be obtained from food or through supplementation. If you think that you may be deficient, increasing your iodine intake from food may not be enough.

🧩 The Missing Piece: It’s Not Just Iodine — It’s the Whole Mineral Matrix

As you just read, iodine is an incredibly powerful mineral. It supports your thyroid, protects your brain, strengthens your immune system, and even helps detoxify halides like fluoride and bromide. But here is what we have learned after 20 years of research: Iodine rarely works alone.

In fact, if you take iodine without balancing it with other key minerals like selenium, magnesium, and zinc, you can actually throw your body out of balance. Furthermore, iodine is just one piece of a much larger puzzle when it comes to protecting your cells from cancer. True healing requires addressing the entire metabolic terrain—from your endocrine system and nutrient absorption to detoxification and immune function.

That is why we created The Truth About Cancer® Mastery Course. In this 10-module, college-level education, we dive deep into the critical role of essential minerals—including exactly how to balance iodine, selenium, and zinc for optimal thyroid and immune health. We also show you how to combine these nutrients with the right protocols to protect your DNA, detoxify your environment, and build a body where disease cannot thrive.

Learn How to Heal the Whole Body

We took 20 years of research, hundreds of expert interviews, and thousands of studies and distilled them into one clear, step-by-step system. In the Mastery Course, you’ll discover:

• The Endocrine Blueprint: How to decode your hormone labs, support your thyroid, and balance your endocrine system naturally.
• The Power of Targeted Compounds: How to use essential minerals, vitamins, and plant-based compounds (like curcumin, berberine, and mistletoe) with the right bioavailability so your body actually absorbs them.
• The Detoxification Protocols: How to safely remove the halides (like fluoride and bromide) that compete with iodine and suppress your thyroid.
• Your 90-Day Action Plan: A written, personalized protocol to put all the pieces together and take control of your health.

You don’t have to guess which supplements to take, how much to take, or which ones contradict each other. We’ve mapped out the exact sequence. And the best part? You can attend the entire 10-module course for FREE.

👉 Click Here for a Course Overview and to Reserve Your Free “Virtual Seat”🎓