What is Iodide ion?
Iodide ion (I⁻) at ≥ 10 mg/kg classifies the spring as an "iodine spring." Common in non-volcanic springs, it delivers antibacterial and cholesterol-lowering effects.
Main Effects
- Total cholesterol reduction (drinking)When consumed, the iodine in the water may help activate lipid metabolism. This process occurs in the liver through the synthesis of thyroid hormones, potentially contributing to lower total cholesterol levels.
- Caution advised for hyperthyroidismIodine is a primary component used to produce thyroid hormones. For individuals with hyperthyroidism, such as Graves' disease, increased iodine intake can overstimulate the thyroid and may worsen symptoms. It is important to consult a physician before use.
- Characteristic yellow-brown tint on air exposureThe water is initially clear as it contains colorless iodide ions (I⁻). Upon exposure to the air, these ions undergo oxidation and transform into iodine molecules (I₂). This chemical change is what gives the water its distinctive yellow-brown color.
Iodide ion Top 5 Hot Springs
Top 5 hot springs registered on this site with the highest content.
RANKING BY THIS MINERAL CONTENT
Top 5 by Content
15 matches
* Top 5 by mineral content matching the filters among onsen analysis records registered in this app
References
- 鉱泉分析法指針（平成26年改訂）第1-1表
- 環境省「あんしん・あんぜんな温泉利用のいろは」（平成31年3月発行）
- 環境省「温泉地の多言語化促進マニュアル」(2021年版)
- 環境省 温泉のページ
- 日本温泉協会
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