The causes of male osteoporosis are as follows: 1, genetic factors: most of the bone mass is determined by genetic factors. If men lack exercise or poor nutrition during adolescence, it can lead to low peak bone mass; 2, endocrine factors: once men’s androgens decrease, it can have an important impact on bone metabolism and the maintenance of bone mass; 3, poor lifestyle: such as smoking, excessive alcohol consumption, drinking carbonated beverages, coffee, strong tea, etc.; 4, less sunlight for men: it can lead to lower vitamin D levels and subsequently osteoporosis .