Brain fog and fatigue? Millions lack this nutrient which is vital for cognitive function
A new report reveals a lack of iodine - vital for thyroid function and cognitive health - could leave many of us living with brain fog and fatigue
Feeling tired, unfocused, or stuck in a haze? It might not just be stress, perimenopause or that third cup of coffee wearing off. A groundbreaking new report published in The Lancet this month reveals a shocking truth: 5.1 billion people - 68% of the global population - aren’t getting enough iodine in a silent health epidemic.
“For us in the UK, this is particularly worrying” says nutritionist and chartered psychologist Dr Naomi Newman-Beinart. “Previous studies have shown that British women and girls are at high risk of iodine deficiency, with over two-thirds of schoolgirls aged between 14 and 15 years found to be iodine deficient.
The consequences could be more serious than you think. Iodine plays a key role in producing thyroid hormones, which help regulate everything from our metabolism to brain function. Without enough iodine, you could start to notice a range of symptoms including constant fatigue, poor concentration, and ‘brain fog’. Sound familiar? If you’ve been feeling like you're trudging through your days in a haze, iodine deficiency could be the hidden culprit.
“Our primary sources of iodine are dairy and white fish, both of which many Brits don’t consume enough," says Dr Newman-Beinart.
“Unlike many other countries, the UK doesn’t use iodised salt, and our diets are often overloaded with ultra-processed foods that lack essential nutrients like iodine. So, while we might think we’re getting everything we need from our food, we could be seriously missing out on this vital mineral.”
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Iodine is found in cows’ milk and dairy products, eggs, sea fish and shellfish, such as prawns. “Seaweed is a superfood we’ve all been overlooking.” says Dr Newman-Beinart. “Packed with iodine, it could be the game-changer if you need to get back on track. From dried seaweed snacks like Itsu Sea Salt Crispy Seaweed Thins (99p; Holland & Barrett) to sushi rolls, adding a little more of this nutrient-rich green into your diet once a week could make all the difference, helping to restore energy levels and improve focus.”
Still not hitting your target? Vegans or those who just don’t like foods like fish and dairy might want to consider taking a dietary supplement to boost their levels. Doctor Seaweed Pure Seaweed (£15 for 30 days supply; doctorseaweed.com), which is made with sustainably sourced Scottish seaweed. Each 500mg capsule contains similar levels of iodine as one portion of haddock.
