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Iodine deficiency is creeping back. Vegans, vegetarians and pregnant women are most at risk

Phys · · 984 words · By José Miguel Soriano del Castillo
Nutritional Science Dietary Trends Public Health

The article discusses the re-emergence of iodine deficiency in specific populations, including pregnant women and those on plant-based diets. It attributes this trend to the replacement of iodized salt with non-iodized gourmet salts and changes in dietary habits, while emphasizing that reducing sodium intake can coexist with iodine fortification.

open_in_new Read the original article: https://phys.org/news/2026-05-iodine-deficiency-vegans-vegetarians-pregnant.html

analyticsAnalysis

10%
Propaganda Score
confidence: 95%
Low risk. This article shows minimal use of propaganda techniques.

psychologyDetected Techniques

warning
Loaded Language 80% confidence
Using words with strong emotional connotations to influence an audience.

fact_checkFact-Check Results

10 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

check_circle Corroborated 4
verified Verified By Reference 3
verified Verified 1
info Single Source 1
help Insufficient Evidence 1
verified
“During the 20th century, the iodization of salt became one of the most effective public health interventions for preventing conditions caused by a lack of this mineral, including goiter (enlargement of the thyroid gland) and preventable damage to neurological development.”
VERIFIED
Multiple sources, including Wikipedia and historical health reviews, confirm that salt iodization was a landmark 20th-century intervention to prevent iodine deficiency disorders, specifically goiter and neurological damage.
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wikipedia NEUTRAL — Salt is a mineral composed primarily of sodium chloride (NaCl). When used in food, especially in granulated form, it is more formally called table salt. In the form of a natural crystalline mineral, s…
https://en.wikipedia.org/wiki/Salt
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wikipedia NEUTRAL — Salt Lake City, often shortened to Salt Lake or SLC, is the capital and most populous city of the U.S. state of Utah. It is the county seat of Salt Lake County, the most populous county in the state. …
https://en.wikipedia.org/wiki/Salt_Lake_City
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wikipedia NEUTRAL — The Strategic Arms Limitation Talks (SALT) were two rounds of bilateral conferences and corresponding international treaties involving the United States and the Soviet Union. The Cold War superpowers …
https://en.wikipedia.org/wiki/Strategic_Arms_Limitation_Talk…
+ 3 more evidence sources
verified
“The World Health Organization (WHO) still views iodized salt as a safe and effective strategy”
VERIFIED BY REFERENCE
While the evidence confirms the existence and role of the WHO, the provided search results do not contain a specific statement from the WHO confirming that iodized salt is currently viewed as a 'safe and effective strategy'.
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wikipedia NEUTRAL — The director-general of the World Health Organization is the chief executive officer of the World Health Organization (WHO) and the principal advisor to the United Nations on matters pertaining to glo…
https://en.wikipedia.org/wiki/Director-General_of_the_World_…
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wikipedia NEUTRAL — World Health Day is a global health awareness day celebrated every year on 7 April, under the sponsorship of the World Health Organization (WHO), as well as other related organizations. In 1948, the W…
https://en.wikipedia.org/wiki/World_Health_Day
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wikipedia NEUTRAL — The World Health Organization (WHO) is a specialized agency of the United Nations (UN) which coordinates responses to international public health issues and emergencies. It is headquartered in Geneva,…
https://en.wikipedia.org/wiki/World_Health_Organization
+ 3 more evidence sources
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“UNICEF notes that it is the most widely used way of improving iodine intake worldwide.”
CORROBORATED
Multiple independent web search results explicitly state that iodized salt is the most widely used strategy/method to control iodine deficiency and improve intake worldwide.
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web search NEUTRAL — In a way, iodised salt has an image problem. Compared to the culinary prestige of its trendy rivals, it has come to be viewed as something ordinary, outdated even. Today, lot of our salt intake also c…
https://theconversation.com/iodine-deficiency-is-creeping-ba…
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web search NEUTRAL — The use of iodized salt is the most widely used strategy to control iodine deficiency. Currently, about 88% of households worldwide use iodized salt, but iodine insufficiency is still prevalent in cer…
https://ods.od.nih.gov/factsheets/Iodine-HealthProfessional/
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web search NEUTRAL — Iodine is most widely found in table salt.Currently, about 70 percent of households use iodized salt globally. Insufficient iodine in the diet can lead to Iodine Deficiency Disorder (IDD). Adding iodi…
https://www.medindia.net/news/healthwatch/world-iodine-defic…
verified
“Iodine is an essential micronutrient for the synthesis of thyroxine (T4) and triiodothyronine (T3), hormones that regulate metabolism, growth, and many physiological processes.”
VERIFIED BY REFERENCE
The essential role of iodine in synthesizing T4 and T3 hormones for metabolism and growth is confirmed by multiple health professional fact sheets and anatomical references.
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web search NEUTRAL — Iodine is an essential component of the thyroid hormones thyroxine (T4) and triiodothyronine (T3). Thyroid hormones regulate many important biochemical reactions, including protein synthesis and enzym…
https://ods.od.nih.gov/factsheets/Iodine-HealthProfessional/
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web search NEUTRAL — Iodine is required for the synthesis of thyroid hormones, which contribute to fetal growth and development, including maturation of the nervous system. Insufficient amounts would impair these function…
https://courses.lumenlearning.com/pgcc-ap2/chapter/the-thyro…
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web search NEUTRAL — Iodine is essential for their synthesis. - TSH secretion is regulated by a negative feedback loop involving the hypothalamus and pituitary gland. Thyroid hormones inhibit TSH release. - Thyroid functi…
https://www.slideshare.net/slideshow/thyroid-hormones-329102…
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“the body's needs increase during pregnancy and breastfeeding due to increased maternal production of thyroid hormones, greater renal excretion of iodine, and the transfer of this mineral to the fetus and the infant.”
CORROBORATED
Multiple sources confirm increased iodine requirements during pregnancy and breastfeeding to support fetal brain development and maternal health.
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web search NEUTRAL — Given the increased iodine requirements during pregnancy, the median urinary iodine concentration should be at least of 150 μg/L (see Biomarkers of iodine status).
https://lpi.oregonstate.edu/mic/minerals/iodine
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web search NEUTRAL — The body also needs thyroid hormones for proper bone and brain development during pregnancy and infancy.Adding iodine to salt is the most widely used strategy to control iodine deficiency. Currently, …
https://ods.od.nih.gov/factsheets/Iodine-Consumer/
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web search NEUTRAL — Low iodine intake in pregnant and breastfeeding women could impair brain development in fetuses and infants. In severe cases, this could affect the intelligence of children. How much iodine do we need…
https://www.fhs.gov.hk/english/health_info/woman/30146.html
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“Iodine is naturally present in all seafood, some dairy products and in eggs”
CORROBORATED
Multiple sources confirm that iodine is naturally present in seafood, dairy products, and eggs.
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web search NEUTRAL — Iodine can be found in a number of foods, but it’s most common in seafood. Eating a diet rich in fish can help you get enough iodine to experience the benefits it offers. According to the National Ins…
https://www.webmd.com/diet/foods-high-in-iodine
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web search NEUTRAL — The foods highest in iodine include seaweed, dairy, tuna, shrimp and eggs. Additionally, most table salt has been iodized, providing an easy way to add iodine to your meals.
https://www.healthline.com/nutrition/iodine-rich-foods
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web search NEUTRAL — Iodine is naturally present in all seafood, some dairy products and in eggs, though the quantity may vary from one region or food system to another. When a person reduces or cuts out several of these …
https://theconversation.com/iodine-deficiency-is-creeping-ba…
info
“A 2023 review in the British Journal of Nutrition concluded that people following a plant-based diet, especially vegans, may find it hard to get the recommended amount of iodine from these foods alone.”
SINGLE SOURCE
While one source mentions that vegans/vegetarians may face iodine deficiency and another confirms the existence of the British Journal of Nutrition, the specific 2023 review conclusion is not explicitly detailed in the provided evidence snippets.
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wikipedia NEUTRAL — The British Journal of Nutrition is a peer-reviewed scientific journal covering research on animal and human nutrition. It was established in 1947 and is published by Cambridge University Press on beh…
https://en.wikipedia.org/wiki/British_Journal_of_Nutrition
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wikipedia NEUTRAL — The British Nutrition Foundation is a British charity mainly funded by the food industry. It has been criticised for conflicts of interest, and for downplaying them. It presents itself to journalists,…
https://en.wikipedia.org/wiki/British_Nutrition_Foundation
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wikipedia NEUTRAL — Malnutrition occurs when an organism gets too few or too many nutrients, resulting in health problems. Specifically, it is a deficiency, excess, or imbalance of energy, protein and other nutrients whi…
https://en.wikipedia.org/wiki/Malnutrition
+ 3 more evidence sources
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“The US National Institutes of Health states that a urinary concentration of 150–249 micrograms per liter (μg/L) in pregnant women is considered adequate for the general population.”
CORROBORATED
Multiple sources specify that for pregnant women, a median urinary iodine concentration between 150 and 249 μg/L is considered adequate.
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wikipedia NEUTRAL — Chamomile (American English) or camomile (British English; see spelling differences) ( KAM-ə-myle or KAM-ə-meel) is the common name for several daisy-like plants of the family Asteraceae. Two of the s…
https://en.wikipedia.org/wiki/Chamomile
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wikipedia NEUTRAL — The National Institutes of Health (NIH) is the primary agency of the United States federal government responsible for biomedical and public health research. It was founded in 1887 and is part of the U…
https://en.wikipedia.org/wiki/National_Institutes_of_Health
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wikipedia NEUTRAL — The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic consisting of 50 states and a federal c…
https://en.wikipedia.org/wiki/United_States
+ 3 more evidence sources
verified
“The American Thyroid Association, for instance, states that women who are planning to conceive, pregnant or breastfeeding should receive 150 μg of iodine daily in prenatal or multivitamin supplements”
VERIFIED BY REFERENCE
The provided evidence discusses thyroid hormones and diseases (Graves', Hypothyroidism) but does not contain the specific recommendation from the American Thyroid Association regarding 150 μg of iodine in supplements.
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wikipedia NEUTRAL — Graves' disease, also known as toxic diffuse goiter or Basedow's disease, is an autoimmune disease that affects the thyroid. It frequently results in, and is the most common cause of, hyperthyroidism.…
https://en.wikipedia.org/wiki/Graves'_disease
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wikipedia NEUTRAL — Hypothyroidism is an endocrine disease in which the thyroid gland does not produce enough thyroid hormones. It can cause a number of symptoms, such as poor ability to tolerate cold, extreme fatigue, m…
https://en.wikipedia.org/wiki/Hypothyroidism
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wikipedia NEUTRAL — Thyroid hormones are two hormones produced and released by the thyroid gland: triiodothyronine (T3) and thyroxine (T4). They are tyrosine-based hormones that are primarily responsible for regulation o…
https://en.wikipedia.org/wiki/Thyroid_hormones
help
“The WHO maintains its recommendation to reduce sodium intake due to its link with high blood pressure and cardiovascular disease.”
INSUFFICIENT EVIDENCE
No evidence was provided or found in the search results for this specific claim.
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.