Hypertension Clinical Trial
Official title:
Defining Optimal Doses of Vitamin D for Chemoprevention in Blacks.
This study will help us know the effects of Vitamin D pills in Blacks. The results of this study may be the first step in creating ways to prevent the risks of colon and prostate cancer. It will also help us develop ways to reduce colon cancer and prostate cancer among Blacks. This study will find out if Vitamin D pills can increase Vitamin D to healthy levels in our bodies.
- Participants will be asked to answer some questions about their diet, exercise and
health. In addition, participants blood pressure will be taken. These assessments will
occur at baseline, 3- and 6-month appointments. At baseline only, we will measure skin
tone with a tool called the Photovolt 577.
- A small blood sample will be taken to see how much Vitamin D is the body and will also
look at levels of other markers of disease such as proteins, hormones, and genes.
- Participants will take a vitamin pill every day for three months and be randomly
assigned to one of four different types of pills.
- Participants will be called or visited at least every two weeks. They will be asked
questions to determine if they have any side effects associated with high levels of
Vitamin D.
- At the beginning of the second and third months, participants will be provided with
more pills. At the end of the third month, another blood sample will be taken. Three
months after that, the final blood sample will be taken.
;
Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Single Group Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Prevention
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