Even as another cold wave hits Korea this winter, many people still refuse to give up their iced drinks—a phenomenon known as "eoljuka" (iced drinks even if freezing to death). However, research suggests that an unusual craving for cold beverages may signal nutritional imbalances such as iron deficiency.
According to PubMed, the U.S. medical database, 88% of patients with iron deficiency anemia reportedly have pagophagia—a compulsive urge to chew ice. The analysis suggests that iron deficiency often causes discomfort such as tongue sores, dry mouth, and oral ulcers, and chewing ice temporarily relieves these symptoms, leading to continued cravings.
A persistent preference for cold drinks may also be a stress signal. Consuming cold foods stimulates the sympathetic nervous system, rapidly mobilizing stored glucose and oxygen as the body shifts into "emergency mode." When this state repeats, fatigue and tension increase, potentially solidifying a pattern of dependence on cold stimulation.
Problems arise when people habitually consume iced beverages or chew ice while ignoring these signals. The most immediate risk is micro-cracks in tooth enamel. These cracks cause sensitivity and sharp pain, and bacteria can penetrate the gaps, leading to greater damage and potential tooth fractures.
Those with high blood pressure should be particularly cautious about cold drinks in winter. Blood vessels constrict to maintain body temperature, naturally raising blood pressure—systolic pressure rises 1.3 mmHg and diastolic pressure rises 0.6 mmHg for every 1°C drop in temperature. Adding cold beverages can cause more dramatic blood pressure fluctuations.
To maintain health during winter, warm beverages should be the default, and monitoring iron levels is important. Iron-rich foods include protein sources such as meat, fish, beans, and eggs, as well as green vegetables like spinach, kale, and bok choy. Those who frequently crave ice or are obsessed with iced drinks should review their dietary habits and, if necessary, get tested to check their iron levels.
