Saves the questions and what to expect into your notes, next to the visit they belong to.
Keep this study
Lead
University of Washington
With
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
We expect that this study will enhance interpretation of available diagnostic tests, inform the results of ongoing large clinical trials of vitamin D supplements, and help develop new strategies to target vitamin D to improve health.
Age
18–any
Sex
ALL
Healthy volunteers
Not accepted
You may be eligible if
Successful prior completion of related protocol CLEAR (NCT02937350) or CLEAR-CF (NCT03104855)
Age ≥ 18 years
Self-reported race Caucasian, African American, or African
You may not be if
Primary hyperparathyroidism
Gastric bypass
Tuberculosis or sarcoidosis
Current pregnancy
Child-Pugh Class B or C cirrhosis (i.e. cirrhosis with ascites, hepatic encephalopathy, bilirubin \>=2 mg/dL, serum albumin \<=3.5 g/dL, or PT \>= 4 seconds)
History of kidney transplantation (unless failed transplant now treated with hemodialysis)
Use of 1,25(OH)2D3 or an analogue, calcimimetics, or medications known to induce CYP24A1 within 4 weeks (wash-out allowed)
