This site became the new on June 19th. Learn more.
Show more Menu IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu IMPORTANT: Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu
Give us feedback

The Effect of Vitamin K2 on Bone Turnover

This study has been completed.
Information provided by:
Eisai Inc. Identifier:
First received: October 23, 2007
Last updated: NA
Last verified: October 2007
History: No changes posted
October 23, 2007
October 23, 2007
February 2002
Not Provided
Same as current
No Changes Posted
Bone turnover marker
Same as current
Not Provided
Not Provided
The Effect of Vitamin K2 on Bone Turnover
Short-Term Menatetrenone Therapy Increases Gamma-Carboxylation Of Osteocalcin With A Moderate Increase Of Bone Turnover In Postmenopausal Osteoporosis: A Randomized Prospective Study
To investigate the effect of menatetrenone on bone turnover in postmenopausal patients with osteoporosis. One month of menatetrenone therapy enhanced the secretion and gamma-carboxylation of osteocalcin. Moderate increases of bone resorption and formation markers were observed after 6 months. These changes may contribute to fracture prevention in patients with osteoporosis.
Not Provided
Phase 4
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Drug: Menatetrenone (Vitamin K2)
Not Provided
Not Provided

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Not Provided
Not Provided

Inclusion criteria:

  • A diagnosis of osteoporosis was made according to the Year 2000 version of the Diagnostic Criteria for Osteoporosis proposed by the Japanese Society for Bone and Mineral Research.
  • These criteria state that patients with a lumbar bone mineral density (BMD)<70% of the young adult mean or patients with pre-existing osteoporotic fractures and a lumbar BMD<80% of the young adult mean can be diagnosed as having osteoporosis.

Exclusion criteria:

  • Patients with secondary osteoporosis (e.g., due to major gastrointestinal surgery, steroid therapy, rheumatoid arthritis, premenopausal bilateral oophorectomy, renal dysfunction, and thyroid dysfunction ).
  • Patients taking medications that could affect bone turnover (such as bisphosphonates, estrogen, calcitonin, SERM, active vitamin D3, or Warfarin) were excluded.
Sexes Eligible for Study: Female
49 Years to 90 Years   (Adult, Senior)
Contact information is only displayed when the study is recruiting subjects
Not Provided
Not Provided
Not Provided
Not Provided
Eisai Limited
Not Provided
Study Director: Norio Iinuma Post -marketing Clinical Research Department, Clinical Research Center - Eisai Company Limited
Eisai Inc.
October 2007

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP