New Study Links Popular Thyroid Drug to Increased Bone Loss

A new study found that levothyroxine, a common medication for hypothyroidism sold as Synthroid, is linked to bone loss in older adults. Here's what experts think of the finding, and whether you should consider changing medications.

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Rodents sent to the ISS reveal possible links between gut bacteria and bone loss in microgravity

The bone density of astronauts—of both the human and rodent variety—decreases in space. Researchers report on April 19 in the journal Cell Reports that changes to the gut microbiomes of space travelers might be associated with this bone loss. Rodents that spent a month or more on the International Space Station had altered and more diverse microbiomes, and the bacterial species that bloomed in space may have contributed to the increased production of molecules that are known to influence the bone remodeling process.