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.
You will be paid up to $200 if you complete all the scheduled study visits. If you withdraw for any reason from the study before completion you will be paid $40 for each complete study visit. You will be paid an additional $200 if you provide muscle sampl