Vitamin D trial in Workplace

Intervention study on vitamin D supplementation in single manufacturing company workers

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

CRIS

Registry ID

KCT0002540

Enrollment

Registered

2017-11-17

Start date

2017-07-04

Completion date

Unknown

Last updated

2019-03-11

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

None listed

Interventions

Dietary Supplement : Oral administration of an OTC vitamin D supplement (&quot

Retune Benefit VitaminD 600IU&quot

, a registrered health functional food), 1 tablet per day for 120 days

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: (i) currently-employed worker at the relevant company (ii) 'vitamin D deficient (serum 25(OH)D <10 ng/ml)' at 2016 health check-up (iii) agree to take 2017 check-up after 120 days of vitamin D supplement intake (iv) agree to utilization of 2016-2017 health check-up results by the researcher

Exclusion criteria

Exclusion criteria: (i) disagree to participate (ii) pregnant or in breastfeeding (iii) has histroy of renal disease or renal function disorder (serum creatiine >1.7 mg/dl or GFR <60 ml/min) (iv) has history of calcium renal stone (v) hypercalcemia(>10.5 mg/dl)

Design outcomes

Primary

Measure	Time frame
variables related to metabolic syndrome: blood pressure, glucose, cholesterol, body mass index and waist circumference	—

Secondary

Measure	Time frame
serum vitamin D level	—

Countries

Korea, Republic of

Contacts

Public ContactHye Yin Park

Seoul National University

hannah_park@hanmail.net+82-2-740-8375

Outcome results