Effect of vitamin K supplementation on bone loss in elderly men and women.
J Clin Endocrinol Metab
; 93(4): 1217-23, 2008 Apr.
Article
em En
| MEDLINE
| ID: mdl-18252784
ABSTRACT
CONTEXT Vitamin K has been implicated in bone health, primarily in observational studies. However, little is known about the role of phylloquinone supplementation on prevention of bone loss in men and women. OBJECTIVE:
The objective of this study was to determine the effect of 3-yr phylloquinone supplementation on change in bone mineral density (BMD) of the femoral neck bone in older men and women who were calcium and vitamin D replete. DESIGN, PARTICIPANTS, AND INTERVENTION In this 3-yr, double-blind, controlled trial, 452 men and women (60-80 yr) were randomized equally to receive a multivitamin that contained either 500 mug/d or no phylloquinone plus a daily calcium (600 mg elemental calcium) and vitamin D (400 IU) supplement. MAIN OUTCOMEMEASURES:
Measurements of the femoral neck, spine (L2-L4), and total-body BMD, bone turnover, and vitamins K and D status were measured every 6-12 months. Intent-to-treat analysis was used to compare change in measures in 401 participants who completed the trial.RESULTS:
There were no differences in changes in BMD measurements at any of the anatomical sites measured between the two groups. The group that received the phylloquinone supplement had significantly higher phylloquinone and significantly lower percent undercarboxylated osteocalcin concentrations compared with the group that did not receive phylloquinone. No other biochemical measures differed between the two groups.CONCLUSIONS:
Phylloquinone supplementation in a dose attainable in the diet does not confer any additional benefit for bone health at the spine or hip when taken with recommended amounts of calcium and vitamin D.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Osteoporose
/
Vitamina K 1
/
Suplementos Nutricionais
Tipo de estudo:
Clinical_trials
/
Observational_studies
Limite:
Aged
/
Aged80
/
Female
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Humans
/
Male
Idioma:
En
Revista:
J Clin Endocrinol Metab
Ano de publicação:
2008
Tipo de documento:
Article
País de afiliação:
Estados Unidos