teen girls who smoke may face an increased risk for osteoporosis later in life.
a study of over two hundred girls ages eleven to nineteen found those who smoked had lower bone mineral density in areas that are particularly vulnerable to fracture later in life -- like the lumbar spine and hip.
experts say the teenage years are critical for bone accumulation, and smoking appears to interfere with the process.
depression also interfered with bone mass accumulation, but to a lesser degree than smoking.
the girls in the study fell below recommended national guidelines for calcium intake and physical activity, so more studies are needed.