In this follow-up study, Tucker and her colleagues recruited men whose average age was about 75 years old. Over a period of four years, the researchers used a bone scanner to make regular measurements of the men's hips, spines and forearms. Tucker also had the men keep detailed information about what they ate. In particular, she asked about vitamin C, because vitamin C seems to slow down bone resorption.
Source: tatoeba (12215850)