What is the effect of calorie and carbohydrate intakes on Thyroid function?5 answersCalorie intake after fasting was found to significantly decrease thyroid stimulating hormone (TSH) levels, potentially affecting the diagnosis of subclinical hypothyroidism. Carbohydrate intake during pregnancy was associated with birth weight, with excessive intake having adverse effects. Diet quality, as measured by the healthy eating index (HEI), was negatively associated with total T3 and free T3 levels in males. Nutritional elements such as iodine, selenium, iron, zinc, and soy were found to be linked to thyroid function, with excessive iodine intake potentially leading to hypothyroidism. Consumption of foods with a high glycemic index was positively associated with fT3 and fT4 levels and negatively associated with TSH levels, while foods rich in saturated fatty acids and high protein concentration were negatively associated with fT3 and fT4 levels.
What is the role of selenium in inflammatory bowel disease?4 answersSelenium plays a role in inflammatory bowel disease (IBD) by exerting anti-inflammatory and antioxidant effects. Studies have shown that patients with IBD have lower selenium levels compared to healthy individuals. Selenium is needed for the biosynthesis of selenoproteins, which contribute to antioxidative defense and immune system function. Selenoproteins can curb the inflammatory response and attenuate oxidative stress, leading to remission in animal models of colitis. Selenium also supports protective gut microbiota, indirectly improving IBD management. Additionally, selenium may block tumorigenesis pathways proposed in colitis-associated colorectal cancer. Preliminary clinical studies have shown promising results with selenium supplementation, particularly in patients with selenium deficiency. However, further randomized clinical trials are needed to measure the short-term and long-term effects of selenium on both active and quiescent IBD.
Can thiocyanate ions affect thyroid function?5 answersThiocyanate ions can affect thyroid function by inhibiting the uptake of iodide by the thyroid and interfering with enzymatic reactions associated with iodide organification and thyroid hormone synthesis. Thiocyanate exposure can lead to a decrease in iodine intake, worsening iodine deficiency. It has been observed that thiocyanate competitively inhibits the sodium-iodide symporter (NIS), which is involved in the first limiting step of thyroid hormone production. Studies have shown that thiocyanate can have deleterious effects on thyroid function, especially in individuals living in iodine deficient areas. However, the impact of thiocyanate exposure on thyroid function is still controversial. Overall, thiocyanate is considered one of the most important environmental compounds influencing the occurrence of thyroid disease, as it hampers the utilization of iodide.
Can fluoride ions affect thyroid function?5 answersFluoride ions have the potential to affect thyroid function. A study conducted in Canada found that adults with moderate-to-severe iodine deficiencies and higher levels of urinary fluoride may be at an increased risk for underactive thyroid gland activity. However, another study on children with normal nutritional status and optimal iodine intake found that long-term intake of fluoridated drinking water did not show an effect on thyroid function. Additionally, a study in China found that excess fluoride exposure, either alone or in combination with excess iodide, can cause changes in thyroid gland structure and function in rats. These findings suggest that the impact of fluoride on thyroid function may depend on factors such as iodine status and duration of exposure.
Does exposure to retinoids affect thyroid function?5 answersExposure to retinoids can affect thyroid function. Retinoic acid treatment can increase thyroid type 1 deiodinase activity, serum T3 levels, and sodium/iodide symporter function. Bexarotene, a rexinoid, has been shown to induce significant hypothyroidism through TSH suppression. Retinoids can also induce apoptosis in normal thyrocytes. However, the dedifferentiating effect of retinol on normal thyrocytes can be mitigated by the combination of TSH and retinol. Overall, retinoids have the potential to interfere with normal thyroid function and can have both time- and retinoid-specific effects.
Does Armour thyroid contain selenium?6 answers