Osteoporosis and osteopenia are conditions where bones become more brittle and prone to breaking. Osteopenia is the less severe form and a signal to work on improving bone health. me> Source: Advocate Medical Group Adult Down Syndrome Center Tags:actonelbiophosphatesbone densitybonesbrittle bonescalcitonincalciumdexa scandual-energy x-ray absorptiometryevistafosamaxosteopeniaosteoporosisvitamin d