DAYLIGHT: Vitamin D Therapy in Individuals at High Risk of Hypertension

Summary

This is a randomized, double-blind, multicenter, 6-month follow-up trial of low (400 IU/day) versus high (4000 IU/day) dose vitamin D supplementation in individuals with pre- and early stage 1 hypertension and vitamin D deficiency. A total of 530 participants (265 participants per treatment arm) will be randomized between 3 sites. Approximately 2,250 participants will be screened between the 3 sites. Vital signs, 24-hour ambulatory blood pressure monitoring, clinical laboratory safety tests and adverse event assessments will be performed to evaluate the effectiveness of the two doses of vitamin D on blood pressure. Blood samples will be stored for future biomarker assessments. The total duration of the study is anticipated to be 18 months, assuming a 12 month enrollment period.

Timeline

Start

2010-12

Primary completion

2013-10

Completion

2013-10

Publications

• Miao J, Bachmann KN, Huang S, Su YR, Dusek J, Newton-Cheh C, Arora P, Wang TJ. Effects of Vitamin D Supplementation on Cardiovascular and Glycemic Biomarkers. J Am Heart Assoc. 2021 May 18;10(10):e017727. doi: 10.1161/JAHA.120.017727. Epub 2021 May 7.
• Zaleski A, Panza G, Swales H, Arora P, Newton-Cheh C, Wang T, Thompson PD, Taylor B. High-Dose versus Low-Dose Vitamin D Supplementation and Arterial Stiffness among Individuals with Prehypertension and Vitamin D Deficiency. Dis Markers. 2015;2015:918968. doi: 10.1155/2015/918968. Epub 2015 Sep 16.
• Arora P, Song Y, Dusek J, Plotnikoff G, Sabatine MS, Cheng S, Valcour A, Swales H, Taylor B, Carney E, Guanaga D, Young JR, Karol C, Torre M, Azzahir A, Strachan SM, O'Neill DC, Wolf M, Harrell F, Newton-Cheh C, Wang TJ. Vitamin D therapy in individuals with prehypertension or hypertension: the DAYLIGHT trial. Circulation. 2015 Jan 20;131(3):254-62. doi: 10.1161/CIRCULATIONAHA.114.011732. Epub 2014 Oct 30.

Drugs

Indications