Vitamin D: Are We Ready to Supplement for Breast Cancer Prevention and Treatment?

Table 2

Ongoing trials of vitamin D supplementation.

Name	Location	Study population, 𝑁	Dose	Outcomes	Current status	Year results expected
VITAL	US	20,000; Men, age 50+; Women, age 55+	2000 IU/d	Cancer, cardiovascular disease	Recruiting until 2012	2017
ViDA	New Zealand	5100; Age 50+	100,000 IU/mo; (3300 IU/d)	Cardiovascular disease, respiratory disease, fracture	Recruiting until 2012	2017
DOHealth	Europe	2150; Age 70+	2000 IU/d	Blood pressure, fracture, infectious disease, cognition, physical function	Recruitment ongoing	2017
FIND	Finland	18,000; Men, age 60+; Women, age 65+	1600 IU/d; 3200 IU/d	Cancer, cardiovascular disease, diabetes	Starting recruitment in 2013	2020
VIDAL	UK	20,000; Age 65–84	60,000 IU/mo; (2000 IU/d)	Longevity and other outcomes	Ongoing recruitment of 1600 for feasibility	2020