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Vitamin K and Bone Turnover in Postmenopausal Women

This study has been completed.
Eisai Limited
Information provided by:
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) Identifier:
First received: June 9, 2003
Last updated: March 17, 2010
Last verified: March 2010

This one year study of the K vitamers phylloquinone (K1) and menatetranone (MK4) will study supplementation effects on bone turnover and bone density. Women at least 5 years postmenopause with normal bone density who do not use estrogen therapy or the following medications may be eligible:

alendronate (Fosamax), risedronate (Actonel), pamidronate (Aredia), etidronate (Didronel), zoledronate (Zometa), teriparatide (Forteo), raloxifene (Evista), tamoxifene, warfarin (Coumadin), anti-seizure medications, prednisone, or oral steroids. Eligible subjects will take calcium and vitamin D (Citracal) twice a day for the first two months and through-out the study. After the first two months, subjects are randomized to the K1, MK4 or placebo groups. Return visits occur at 1, 3, 6 and 12 months. Fasting blood and urine is collected at each visit and bone density is performed at 3 study visits.

Condition Intervention Phase
Drug: phylloquinone (K1)
Drug: menatetranone (MK4)
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Single Group Assignment
Masking: Double-Blind
Primary Purpose: Treatment
Official Title: Vitamin K and Bone Turnover in Postmenopausal Women

Resource links provided by NLM:

Further study details as provided by National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK):

Estimated Enrollment: 375
Study Start Date: September 2000
Estimated Study Completion Date: October 2004

Genders Eligible for Study:   Female
Accepts Healthy Volunteers:   Yes
  • Female, 5 years postmenopause.
  • Ambulatory.
  • Community dwelling.
  • Able to ingest calcium and vitamin D supplements.
  • Willing to restrict vitamin K intake.
  • Stable thyroid dose if appropriate.
  • No history of hyperthyroidism, hyperparathyroidism or other metabolic bone diseases.
  • Absence of hardware in hip and spine.
  • History of malignancy within the last five years.
  • Not currently using coumadin or warfarin.
  • Vitamin D supplements must be less than 800 IU daily.
  • Have not used estrogen or other bone-altering medications (see list in study description) within the last year.
  • No history of liver disease or malabsorption.
  • No known allergy to vitamin K.
  • Have not participated in an investigational drug trial within the last month.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00062595

United States, Wisconsin
University of Wisconsin Osteoporosis Clinical Research Prog.
Madison, Wisconsin, United States, 53705
Sponsors and Collaborators
Eisai Limited
  More Information

Additional Information:
No publications provided Identifier: NCT00062595     History of Changes
Other Study ID Numbers: DK58363 (completed 2005)
Study First Received: June 9, 2003
Last Updated: March 17, 2010
Health Authority: United States: Food and Drug Administration

Keywords provided by National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK):
Vitamin K
Bone turnover

Additional relevant MeSH terms:
Bone Diseases
Bone Diseases, Metabolic
Musculoskeletal Diseases
Vitamin K
Antifibrinolytic Agents
Fibrin Modulating Agents
Growth Substances
Hematologic Agents
Molecular Mechanisms of Pharmacological Action
Pharmacologic Actions
Physiological Effects of Drugs
Therapeutic Uses processed this record on November 27, 2014