Iodine Deficiency and Epilepsy: The Link We All Need to Understand
🌿Iodine & Epilepsy
It’s often said that food is medicine, and research increasingly supports this truth. Nutrient deficiencies can disrupt the body’s normal function, but few nutrients are as crucial for brain health as iodine. Recent studies suggest that iodine plays a significant role not only in overall brain function but also in the management of epilepsy.
In this article, we’ll explore the connection between iodine deficiency, thyroid health, and epilepsy, while offering practical guidance on how to ensure you and your loved ones get enough of this essential nutrient.
🦋Understanding the Thyroid Gland
Before diving into the research, let’s briefly discuss the thyroid gland. This small, butterfly-shaped gland sits at the front of your neck, just below the voice box. Part of the hormone system, the thyroid regulates many processes, including:
Metabolism: How efficiently your body converts food into energy.
Heart rate: Maintaining proper cardiovascular function.
Growth and development: Especially important in children.
Brain health: Thyroid hormones strongly influence brain development, cognitive function, and neuronal signaling.
Without sufficient iodine, the thyroid cannot produce the hormones needed to keep these systems in balance, potentially leading to a range of health issues, including neurological disorders like epilepsy.
🩺The Link Between Iodine Deficiency and Epilepsy
Multiple studies highlight the relationship between iodine deficiency, thyroid function, and epilepsy:
1.Modern Prevention of Epilepsy in Iodine-Deficient Adolescents (2024)
This study found that low iodine levels reduce the production of thyroid hormones, which are vital for healthy brain activity at any age. In children with iodine deficiency, researchers observed:
Worsened epilepsy symptoms
Increased severity of psychopathological disorders (Bipolar Disorder, Phobias, ADHD, and Panic Disorder)
Slower overall recovery
However, supplementing L-thyroxine alongside traditional treatment showed positive improvements in disease progression, highlighting the critical role of thyroid support in managing epilepsy.
MODERN PREVENTION OF EPILEPSY IN IODINE DEFICIENT ADOLESCENTS – 2024
2. Thyroid Hormones: Possible Roles in Epilepsy Pathology (2015)
Thyroid hormones are essential for normal brain development. They guide how brain cells grow, move, connect, and form myelin, the protective covering of neurons. Deficiency in thyroid hormones can result in lasting cognitive and motor issues.
Key points:
Thyroid hormones regulate GABA (calming brain activity) and glutamate (exciting brain activity).
Epilepsy is often associated with imbalances in these neurotransmitters, oxidative stress, and mitochondrial dysfunction.
Thyroid hormone deficiency exacerbate these problems, potentially contributing to epilepsy.
Thyroid hormones: Possible roles in epilepsy pathology - ScienceDirect – 2015
3. Iodine Deficiency Exacerbates Thyroidal and Neurological Effects of Developmental Perchlorate Exposure in Rats (2024)
This animal study showed that iodine deficiency, combined with exposure to certain chemicals, affected the brain’s ability to filter sensory information, measured through a process called prepulse inhibition (PPI).
Impaired PPI is linked to neurological disorders like autism, schizophrenia, epilepsy, and Tourette’s syndrome.
Research suggests that this impairment may be related to GABA signaling deficits and the loss of inhibitory neurons.
Interestingly, males were more affected than females, possibly due to the protective effects of eostrogen.
🩺Medication and Thyroid Health
Certain traditional anti-epileptic drugs (AEDs) can further impair thyroid function, which may worsen epilepsy:
Older AEDs: valproate, carbamazepine, phenobarbital
Newer AEDs: levetiracetam, topiramate, oxcarbazepine
Studies show that older AEDs have more pronounced effects on thyroid hormone levels, whereas newer medications appear to have a milder impact.
This highlights the importance of monitoring thyroid health alongside epilepsy management.
🐟Iodine: Nature’s Brain Nutrient:
Fortunately, iodine is naturally available in several foods, especially those from the ocean:
Seaweeds: kelp, hiziki, kombu, nori, arame, wakame
Wild-caught seafood: cod, salmon, mackerel, oysters
Eggs and dairy: cage-free, organic eggs, Greek yogurt, milk
Vegetable sources include:
Green beans and peas
Leafy greens, onions, sweet potatoes
Legumes, nuts, seeds, whole grains
🧂Daily Iodine Requirements
According to the NHS, recommended daily iodine intake is:
Adults: ~140 micrograms (µg) per day
Children: ~100–140 (µg) per day
Some of the top iodine-rich foods include:
🌿1 sheet of dried kelp - 2,984 µg
🐟 85 g of baked cod - 146 µg
🦪 85 g of cooked oysters - 93 µg
🐄170 g full-fat Greek yogurt - 87 µg
🥚1 large hard-boiled egg - 31 µg
🫛100 g green beans - 2–3 µg
🥬100g spinach - 2–5 µg
Iodine isn’t just a nutrient, it’s a brain protector. Adequate iodine intake supports thyroid hormone production, which is crucial for normal brain function and may influence the development and severity of epilepsy.
By paying attention to iodine-rich foods and monitoring thyroid health, we can empower our brains and bodies to function at their best.