Koreans' Salty Diet Habits Raise Osteoporosis Risk

Korean dietary habits are hardening into a structure that threatens bone health. Experts warn that excessive salt intake combined with severely inadequate calcium consumption is increasing the risk of osteoporosis.

According to the "2024 National Health and Nutrition Survey" released by the Korea Disease Control and Prevention Agency on the 6th, Korean sodium intake exceeded recommended levels by 60.6 percentage points for men and 15.7 percentage points for women. However, calcium intake remained at only 69.1% of recommended levels for men and 61.5% for women.

Continued imbalance in dietary habits can be fatal to bone health. When sodium is consumed in excess, the kidneys excrete calcium along with sodium during the elimination process. When excessive sodium intake is combined with already insufficient calcium consumption, calcium imbalance in the body worsens, bone density drops sharply, and osteoporosis risk increases.

Human bones are not merely support structures. The body's 206 bones maintain body shape, protect vital organs such as the heart and lungs, and serve as anchors when muscles move. Bone composition is also complex. Organic materials like collagen provide elasticity, while minerals such as calcium and phosphate create hardness to withstand impact.

Bones do not remain static throughout life but constantly change. Soft cartilage during fetal development hardens as calcium accumulates during growth. Bones lengthen through the teenage years, become denser in the 20s, and reach peak bone mass in the mid-30s. After age 35, bone-destroying cells become relatively more active, gradually reducing bone density. Women face higher osteoporosis risk than men because bone loss accelerates after menopause due to decreased estrogen levels.

However, age alone does not determine osteoporosis. Multiple factors including age, menopause status, weight, medications, calcium intake, alcohol and smoking habits, underlying conditions, and family history all play combined roles.

"Many people think bones become strong just by taking calcium and believe sodium is only related to high blood pressure. They don't realize that these two nutrients interact and can disrupt calcium balance," said Lee Ji-min, director of the Joint Center at Daedong Hospital. "Bones are tissues that change slowly under multiple influences from childhood to old age, so dietary habits and nutritional status must be managed comprehensively."

Lee added, "Osteoporosis is called the 'silent thief' because it progresses without symptoms. Bones can fracture from minor impacts, so those at risk should measure bone density regularly and prepare in advance."

Dietary adjustment is essential to prevent osteoporosis. Calcium-rich foods such as milk, cheese, eggs, tofu, spinach, and other green vegetables should be consumed in balanced portions. If food alone is insufficient, calcium supplements can be taken after consulting a doctor. Vitamin D, which aids calcium absorption, is also important. Exposure to sunlight for 15 to 20 minutes daily helps the body produce vitamin D.

Soups, stews, kimchi, processed foods, and delivery foods are high in sodium and should be avoided or consumed sparingly. When purchasing processed foods, checking sodium content on nutrition labels should become a habit. Exercise is particularly important during teenage years.

Consistent weight-bearing exercises such as running, brisk walking, and hiking can increase peak bone mass, laying the foundation for osteoporosis prevention later in life. Regular exercise in older age slows bone density decline, builds muscle strength and balance to reduce falls, and benefits overall health including cardiovascular function. Quitting smoking and moderating alcohol consumption are also key to osteoporosis prevention.