Is spinach high in iodine?

Spinach has a relatively high iodine content, making it one of the vegetables with higher iodine levels. Specifically, spinach may contain approximately 1.64 milligrams of iodine per kilogram, which is significantly higher than the average iodine content of most terrestrial plants, which generally do not exceed 1.0 milligram per kilogram. Additionally, since iodine is an essential raw material for the synthesis of thyroid hormones, excessive or insufficient intake may affect thyroid function. Therefore, it is recommended to maintain a balanced iodine intake in daily diet.

In addition to iodine, spinach is also rich in various nutrients, such as vitamin A, vitamin B6, vitamin E, selenium, vitamin C, iron, potassium, chromium, folic acid, and minerals. These components play important roles in maintaining human health, including promoting metabolism, improving blood circulation and complexion, and preventing atherosclerosis. Spinach also contains a considerable amount of oxalic acid, which, when consumed in excess, may interfere with calcium absorption and even lead to problems such as kidney stones. Therefore, appropriate preparation methods, such as blanching, are recommended before consumption.

For individuals needing iodine supplementation, in addition to consuming spinach, other high-iodine foods, such as seafood, can also be considered.