To increase bone density, you can change your diet, such as consuming calcium-rich foods, including milk, etc. You can also take medication, such as calcium tablets. Consuming more calcium-rich foods, such as milk and green leafy vegetables, as well as sunbathing and exercising are helpful in increasing bone density. At the same time, you should avoid smoking and drinking less coffee, which can reduce the loss of calcium in the body. In addition, medication is also available, including calcium tablets, osteotriol, vitamin D, etc., as well as bisphosphonates, including alendronate. If you have low bone density, you need to go to the hospital in time and follow your doctor’s advice when using the above medications.