Big once a month doses of vitamin D don't increase fracture risk but aren't a big help either

Vitamin D supplements taken once a month do not increase people's risk of getting a bone fracture according to Australian research, although the study also didn't find any clear benefit from taking the supplements. Previous studies had left experts uncertain if monthly vitamin D supplementation would increase fracture risk, but this new research did not find an effect of monthly doses of 60 000 international units of vitamin D3 on fractures. However, there was a hint of benefit that was starting to show around the end of the trial, at the 5-year mark, which the authors say suggests that vitamin D supplements might reduce the rate of fractures if they are taken for more than 3–4 years, but more research is needed to confirm this.