Skip to main content
OpenTrials
Completed

NCT Number: NCT00575835

Oral Vitamin D Supplementation in Elderly Women

The aim of this study is to compare oral vitamin D supplementation administered in two different ways, namely either twice a day (800IU/d, 292000IU/y) or three times a year (97333IU every 4 months, 292000IU/y) in elderly women in combination with daily supplementation of calcium 1 gram. We will 1)compare the blood concentrations of 25 OH vitamin D in the two treatment groups amd monitor if a sufficient and safe concentration of 25OH D in blood can be maintained with these two treatments.2) Find out seasonal variation in vitamin D concentrations in these treatments. 3) Find out safety of these treatments

Completed

Looking for future studies?

Notify Me

Key information

Conditions

Optimal Vitamin D Administration

Age range

70 year–80 year

Sex eligibility

Female

Study type

Interventional

Phase

Not applicable

Primary location

Helsinki University Central Hospital, department of medicine, division of endocrinology

Helsinki, 00029 HUS, Finland

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Females
  • 70-80 years
  • Living in the community

Exclusion criteria

  • Renal disease
  • Diseases that contraindicate vitamin D supplementation
  • Medications affecting bone
  • Malignancy

Treatment and study plan

vitamin D twice daily

Dietary Supplement

Kalsipos-D, vitamin D3 400 ID/tbl, 2 tbl/day for one year

Vitamin D3 oil three times in a year

Dietary Supplement

Vigantol oil , D3 20000IU/ml, 4.9 ml every four months for one year

Primary outcomes

  1. Blood 25 OH D vitamin concentrations

    Time frame: 8 times during the year

Secondary outcomes

  1. serum calcium, 24-hour calcium excretion in urine, creatinine clearance

    Time frame: 8 times during the year

Sponsors and collaborators

Lead sponsor

University of Helsinki

Other

Collaborators

  • Lilly Foundation
  • Päivikki and Sakari Sohlberg Foundation, Finland

Registry information

Official study title

Oral Vitamin D Supplementation in Elderly Women: Twice a Day or Three Times a Year? A Randomised Controlled Trial

Important dates

Study start
2006
Study completion
2007
First posted
Dec 18, 2007
Registry last updated
Jan 8, 2008

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.