Erasmus University researchers found that men and women with the highest levels of homocysteine had twice the risk of suffering a fracture compared with those with the lowest levels.

Brittle bones can be more than just a bother for anyone who is getting on in years. About 10 million Americans have osteoporosis–a gradual thinning of the bones–and 1.5 million of them will suffer a fracture this year. That’s why doctors were so interested in a pair of…