Foods don't display radiation protection—don't blindly follow trends. Japan's powerful earthquake triggered nuclear radiation leaks, sparking public concern. While such radiation pales in comparison to nuclear plant emissions, it's actually ubiquitous in daily life. Computers, induction cookers, and microwaves bring countless conveniences, yet the radiation they emit also troubles people.How can we minimize radiation exposure?
No Need to Fear Radiation
Following Japan's nuclear leak, online discussions intensified about radiation hazards. Ma Tanyuan, Director of Nuclear Medicine at Tsinghua University First Affiliated Hospital, emphasized that there's no need to panic. Public anxiety often stems from misunderstanding radiation.
Ma explained to reporters that nuclear radiation affects the human body in two ways: deterministic effects occur when the body is exposed to a large dose of radiation at once, causing damage. Random effects, however, are ubiquitous—radon gas in the ground constantly emits radiation, which is unavoidable and does not cause deterministic harm. Currently, radiation levels at Japanese nuclear plants are low, so there is no need for excessive panic.
Self-administering iodine tablets is inadvisable
Recent rumors claiming that consuming iodized salt or preemptively taking iodine supplements can effectively shield against nuclear radiation have led to shortages of iodine tablets and iodine tincture in many pharmacies.
Ma Tanyuan explained that following a nuclear radiation incident, individuals may ingest radioactive iodine, which concentrates in the thyroid gland, exposing this organ to a significant dose of radiation.Preemptive potassium iodide tablets can saturate the thyroid with iodine, reducing its uptake of radioactive iodine-131 and thereby lowering cancer risk.
Zhang Zheng, a pharmacist at Beijing Chaoyang Hospital's Pharmacy Department, emphasized that individuals without radiation exposure risk should not self-administer large doses of iodine supplements long-term.Iodine is a raw material for synthesizing thyroid hormones, with normal daily requirements ranging from 100 to 150 micrograms. High-dose iodine can cause thyroid dysfunction, leading to nausea, vomiting, abdominal pain, diarrhea, and even suffocation.Long-term use may also cause hyperkalemia, manifesting as confusion and arrhythmia. Crucially, iodine can cross the placenta and be secreted through breast milk. Pregnant or lactating women who take excessive iodine beyond physiological needs risk causing thyroid dysfunction in their fetuses or infants.
The World Health Organization also emphasizes that potassium iodide tablets are not "radiation antidotes," and their use requires caution.
Concealment is the primary protective measure
Online claims abound that consuming green tea, wood ear mushrooms, kelp, spirulina, and other foods effectively prevent or counteract radiation, with some even listing "7 miraculous foods for radiation protection." Experts disagree with these assertions.
Ma Tanyuan informed reporters that no scientific studies currently demonstrate these foods can resist radiation. Environmental expert Dong Jinshi also stated that radiation contamination is physical in nature and has little connection to food; remedial effects through diet would be limited. Many believe certain foods can prevent radiation, but this stems from the idea that consuming antioxidant-rich foods boosts the body's immunity.Additionally, these foods enhance the body's excretory capacity, facilitating the timely elimination of harmful radiation substances absorbed by the body, thereby mitigating radiation damage.
Key points on nuclear and radiation accident protection issued by the Chinese Center for Disease Control and Prevention state that in the event of a nuclear or radiation emergency, the public's first priority must be to obtain reliable information about the incident and understand government decisions and notifications.
The second step is to swiftly implement necessary protective measures. When a radioactive dispersion event is suspected, avoid moving directly into or downwind. Instead, seek shelter at an angle to the wind direction and quickly enter a building. Once inside, close all doors, windows, and ventilation systems to minimize inhalation and exposure to radioactive particles in settling dust.
That concludes our guidance on food radiation protection and avoiding blind adherence to rumors. We trust you now have a clearer understanding. Finally, we sincerely wish you good health and happiness.