Primary osteoporosis is a condition where bone density and quality decrease, making bones fragile and more likely to break. It typically occurs in older adults, especially women. Prevention methods include: consuming foods rich in calcium and vitamin D, like milk and fish; getting adequate sunlight exposure; engaging in regular weight-bearing exercises, such as walking or stair climbing; avoiding smoking and excessive alcohol consumption. If necessary, supplements or medications may be taken under a doctor's guidance to protect bone health.