Thank you for your patience. Click here to subscribe. Knowing the seaweed benefits and side effects will help to consume the right amount of this popular sea vegetable. Iodine levels in seaweed vary widely depending on the species and where they are grown, says Vesanto Melina, a registered dietitian and co-author of Becoming Vegan: Comprehensive Edition (and Express Edition). Common thyroid disorders include Hashimoto's disease, Graves' disease, and goiter. Have the following information handy if possible when you call 911 or get to the hospital: The symptoms of iodine poisoning range from fairly mild to severe, depending on how much iodine is in your system. Numerous studies have linked the Japanese diet – high in fish, seaweed, soya, fruits and vegetables – to lower rates of cardiovascular disease, Type 2 diabetes, obesity and cancers in general. Lindsey is the owner and founder of Rise Up Nutrition helping athletes overcome disordered eating to perform at their highest level (. In addition to being an excellent source of many vitamins and minerals, seaweed snacks have several health benefits. may earn compensation through affiliate links in this story. Potassium iodide supplements and contrast dye, which is used for CT scans, also contain iodine. A January 2014 study published in the Journal of Plant Research found contaminated samples of algae. Nori (Porphyra umbilicalis): Nori is typically shredded and rack-dried in a process that resembles paper-making. This is both an advantage and disadvantage of seaweed, as excessive iodine intake has several side effects. © 2005-2020 Healthline Media a Red Ventures Company. Learn about their symptoms, diagnosis, and treatments. Red algae - safe enough that you can eat all you want. When consumed in moderation, seaweed snacks are a good source of iodine and other nutrients. Here's why. No, you cannot eat seaweed. A benefit to one person may be a side effect to another. Other food sources of iodine include shrimp, boiled eggs, cooked navy beans, and unpeeled potatoes. Iodine poisoning usually requires a trip to the hospital. Incorporate nori sheets into your diet by making at-home sushi rolls, or sprinkle dulse flakes on your food for umami flavor. Seaweed snacks may be more beneficial than seaweed pills because supplements are not regulated by the FDA, and seaweed snacks are closer to the whole sea vegetable. Doctors have reported rare but serious cases of excess iodine and heavy metal toxicity in patients who consumed too much seaweed or seaweed supplements. Like iodized salt, seaweed prevents this crisis from returning. 351 King Street East, Suite 1600, Toronto, ON Canada, M5A 0N1, Just $1.99 per week for the first 24 weeks, var select={root:".js-sub-pencil",control:".js-sub-pencil-control",open:"o-sub-pencil--open",closed:"o-sub-pencil--closed"},dom={},allowExpand=!0;function pencilInit(o){var e=arguments.length>1&&void 0!==arguments[1]&&arguments[1];select.root=o,dom.root=document.querySelector(select.root),dom.root&&(dom.control=document.querySelector(select.control),dom.control.addEventListener("click",onToggleClicked),setPanelState(e),window.addEventListener("scroll",onWindowScroll),dom.root.removeAttribute("hidden"))}function isPanelOpen(){return dom.root.classList.contains(}function setPanelState(o){dom.root.classList[o?"add":"remove"](,dom.root.classList[o? Even if you don’t take iodine supplements, certain things can make you more sensitive to iodine, which increases your risk of developing iodine poisoning. According to the USDA, one nori sheet contains the following nutrition facts: Nori sheet nutrition does not stop there. Doctors have dealt with patients who have consumed far too much seaweed (including supplements) and suffered from excess iodine, or toxicity from heavy metals. Consult with your doctor. What You Should Know About Iodine Deficiency, Kelp Benefits: A Health Booster from the Sea, Why You Should Not Mix Bleach and Vinegar While Cleaning, Debra Rose Wilson, Ph.D., MSN, R.N., IBCLC, AHN-BC, CHT, How to Know If Your Perfume Is Poisoning You, What to Do If Your Baby Shows Signs of Pink Eye, What to Know If You’re Told Your Baby Needs Tongue-Tie Surgery, adolescents ages 14 to 18: 900 mcg per day, adults ages 19 and older: 1,100 mcg per day, any underlying conditions they may have, especially anything involving the thyroid. More mild symptoms of iodine poisoning include: Severe symptoms of iodine poisoning include: Consuming too much iodine can also lead to a condition called iodine-induced hyperthyroidism. Perfume poisoning is rare, but we'll tell you the symptoms to watch for and what to do if it happens. Since it is low in calories, fat and carbohydrates, it can be incorporated into a variety of diets. While carrageenan is derived from seaweed (Irish moss), carrageenan gum is a heavily processed food additive that researchers have linked to inflammation in the gut. The National Institutes of Health considers seaweed to be one of the best dietary sources of iodine, as one nori sheet provides at least 11 percent DV of iodine. Healthline Media does not provide medical advice, diagnosis, or treatment. Few foods naturally contain iodine, so manufacturers started adding it to table salt to prevent iodine deficiency. Seaweed snacks are growing in popularity due to manufacturers’ health claims. The material appearing on LIVESTRONG.COM is for educational use only. For the best outcome, it’s important to get emergency treatment at the first sign of iodine poisoning. Welcome to The Globe and Mail’s comment community. In cultures that eat a lot of seaweed, people sometimes consume thousands of mcg of iodine per day. This specimen was scanned by Josie Iselin, author of An Ocean Garden: The Secret Life of Seaweed. Copyright © There is even an emerging market for seaweed pills — containing various sea vegetables and marine algae — to treat iodine deficiency among other claims. A staple during the Irish famine of 1845 to 1852, it was traditionally used as a thickener for soups and puddings. These including thyroid conditions, such as: Having a thyroidectomy, which removes all or part of your thyroid gland, also makes you more sensitive to iodine, increasing your risk of iodine poisoning. Most seaweed contains high levels, and a person may consume too much if they eat a lot of seaweed over an extended period. Before you jump on this trend, weigh the seaweed benefits and side effects. Edible seaweed falls into three main groups: Green algae - completely safe. Depending on how severe your symptoms are, your doctor might give you medication to make you vomit. Named for its palm-like fronds, this mild, almost nutty-tasting kelp grows only on wave-washed rocks on the West Coast of North America. Lindsey Elizabeth MS RD CSSD is a Registered Dietitian and Board Certified Specialist in Sports Dietetics with over 10 years of experience in elite sports nutrition and performance. Some include nori, kelp, dulse, kombu, spirulina and chlorella. This leads to a phenomenon called the Wolff-Chaikoff effect, which is a decrease in thyroid hormone production that usually lasts for about a week. Another side effect related to the environment is heavy metal exposure. 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