Trial reportOsteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA2021
The effect of vitamin MK-7 on bone mineral density and microarchitecture in postmenopausal women with osteopenia, a 3-year randomized, placebo-controlled clinical trial.
Trial report in Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT01922804 (Investigations of the Effect of MK-7 on Bone and Glucose Metabolism and Arterial Calcification), which is not on this map. Cited by 30 papers, 5 of them syntheses that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Investigations of the Effect of MK-7 on Bone and Glucose Metabolism and Arterial Calcification
Who cites it
30 citing papers in PubMed, 5 syntheses or guidelines pooled it, 35 citations in OpenAlex.
- The effect of vitamin K2 supplementation on bone turnover biochemical markers in postmenopausal osteoporosis patients: a systematic review and meta-analysis.Frontiers in endocrinology · 2025Pooled it
- The effect of non-pharmacological interventions on bone health among patients with low bone mass: a systematic review and meta-analysis.Frontiers in endocrinology · 2025Pooled it
- Habitual natto intake elevates serum MK-7 levels, enhances osteocalcin carboxylation, and supports bone density: a meta-analysis of Japanese evidence.Frontiers in nutrition · 2025Pooled it
- Efficacy of vitamin K2 in the prevention and treatment of postmenopausal osteoporosis: A systematic review and meta-analysis of randomized controlled trials.Frontiers in public health · 2022Pooled it
- The combined effect of vitamin K and calcium on bone mineral density in humans: a meta-analysis of randomized controlled trials.Journal of orthopaedic surgery and research · 2021Pooled it
- Vitamin K supplementation and bone mineral density in dialysis: results of the double-blind, randomized, placebo-controlled RenaKvit trial.Nephrology, dialysis, transplantation : official publication of the European Dialysis and Transplant Association - European Renal Association · 2023Trial
- The additive effect of vitamin K supplementation and bisphosphonate on fracture risk in post-menopausal osteoporosis: a randomised placebo controlled trial.Archives of osteoporosis · 2023Trial
- Metabolic Changes of Perimenopause and Nutritional Advice.Current nutrition reports · 2026Review
- Bone as a Biomarker of Ageing and Senescence: Connecting Musculoskeletal Health to Longevity via Diet, Nutrition and Exercise.Biology · 2026Review
- Investigating the interrelationship of vitamin K and vitamin D status on bone density: results from the VITamin D and OmegA-3 TriaL.JBMR plus · 2026Article
- Oral Food Supplement with Bio-Activated Silicium and Vitamins D3 and K2 in the Conservative Management of Osteoporotic Vertebral Compression Fractures.Journal of clinical medicine · 2026Article
- From the Vitamin D Paradox to Precision Nutrition: Targeted Supplementation, Assay Pitfalls, and Clinical Decision-Making.Current nutrition reports · 2026Review
- The role of gut microbiota-immune-endocrine crosstalk in the pathogenesis of osteoporosis.Frontiers in immunology · 2026Review
- Vitamin K status has no influence on the effect of vitamin D supplementation on bone turnover and cardiovascular markers: a randomized controlled trial.Frontiers in nutrition · 2026Article
- Metabolic Engineering Strategy forFoods (Basel, Switzerland) · 2025Review
- Dietary menaquinone-9 supplementation does not influence bone tissue quality or bone mineral density during skeletal development in mice.JBMR plus · 2025Article
- Review
- Daily cheese intake positively affects serum osteocalcin levels, vitamin K status and bone turnover markers in elderly men and women.BMJ nutrition, prevention & health · 2025Article
- Vitamin K and women's health: a review.Frontiers in global women's health · 2025Review
- The Importance of Vitamin K and the Combination of Vitamins K and D for Calcium Metabolism and Bone Health: A Review.Nutrients · 2024Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
We conducted a randomized placebo-controlled double-blinded clinical trial of MK-7 or placebo daily for 3 years in postmenopausal women with osteopenia. BMD decreased at all sites without differences between the MK-7 and placebo-treated women. Changes in bone turnover markers and microstructure were similar between the two groups.
introductionVitamin K is a cofactor in the carboxylation of osteocalcin (OC) and carboxylated OC promotes mineralization of bone. Clinical studies suggest that vitamin K2 prevents bone loss. The aim of the study was to investigate the effect of vitamin K2 as an add-on to calcium and vitamin D supplementation on osteocalcin, bone mass, and microarchitecture in postmenopausal women.
methodsWe conducted a randomized placebo-controlled double-blinded clinical trial, including 142 postmenopausal women with osteopenia who received vitamin K2 (375 μg MK-7) or placebo daily for 3 years. Both groups received vitamin D3 (38 μg/day) and calcium (800 mg/day). We measured bone turnover markers in serum and bone mineral density and microarchitecture by DXA and HRpQCT.
resultsUndercarboxylated osteocalcin decreased in the MK-7-group (- 65.2 ± 23.5%) (mean ± SD) compared with the placebo group (- 0.03 ± 38.5%), p < 0.01 after 1 year. After 3 years, aBMD decreased at all sites without differences between the MK-7 and placebo-treated women (p > 0.09). aBMD decreased at the total hip by 1.5 ± 2.5% and 2.4 ± 2.7% in the MK-7 and the placebo groups, respectively, at the femoral neck by 1.5 ± 3.5% and 1.0 ± 5.0% in the MK-7 and the placebo groups, respectively, and at the lumbar spine by 1.8 ± 3.9% and 1.1 ± 3.1% in the MK-7 and the placebo groups, respectively. Changes in bone turnover markers were also similar between the two groups.We have previously reported improved microarchitecture with MK-7 after 1 year. However, changes in microstructure over 3 years were similar between the two groups, as assessed by both HRpQCT and DXA trabecular bone score.
conclusionTreatment with MK-7 375 μg daily as an add-on to calcium and vitamin D increased carboxylation of osteocalcin. However, treatment of postmenopausal women with osteopenia for 3 years did not affect biochemical markers of bone turnover, bone mineral density, or bone microarchitecture.
trial registrationThe study was registered at Clinicaltrial.gov : NCT01922804 .
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.