What kind of vitamin D is best?
The recommended form of vitamin D is vitamin D3 or cholecalciferol. This is the natural form of vitamin D that your body makes from sunlight. Supplements are made from the fat of lambs' wool.
However, a clinical study reported in 2008 suggested that vitamin D2 works as well as vitamin D3.
Many supplements contain vitamin D as vitamin D2 or calciferol. It's derived from irradiated fungus. Because this is not the form of vitamin D naturally made by your body, WebMD...
Teriparatide (Forteo) is self-injected into the skin. Because long-term safety is not yet established, it is only FDA-approved for 24 months of use. It reduces spine fractures in women with known osteoporosis, but reduction of hip fracture risk is currently unproven.
Who Should Take Forteo?
Men who have osteoporosis and postmenopausal women can take Forteo.
Forteo is not used to prevent osteoporosis or to treat mild osteoporosis.
This drug should be used if you've had at least one bone fracture due to thinning bones, you are at high risk of fractures, or you haven't responded to other osteoporosis therapies.