What we are studying
The purpose of this research study is to see if vitamin D changes your muscle function and your risk of falling. The study lasts 12 months and you will have up to 2 visits to see if you qualify. If you do, you will randomly be assigned either to the vitamin D group and you will be given a 12 month supply of 2,000 IU of vitamin D3 and will be asked to take one per day. If you are placed into the placebo group, you will be given a 12 month supply of the placebo and will be asked to take one per day. You will be asked to come back after 4 months and again after 12 months to complete the study.
Participants receive up to $200 for completing all study visits & an additional $200 is given if muscle samples are completed. A participant who withdraws from the study will receive $40 for each completed visit & $100 for each completed muscle sample.