Clinical trials: Vitamin K 2
Vitamin K-status
Dose-finding Study for Vitamin K2 in Human Volunteers
Earlier studies have shown that high vitamin K-intake leads to improved bone and vascular health by increased carboxylation of Gla-proteins in these tissues.
- Trial name
- NCT00483431
- Testing
- MK7
- Where
- Netherlands
- Volunteers
- 42 people, healthy volunteers welcome
- Sponsor
- Maastricht University Medical Center
Healthy Volunteers
Dose-Response in PD and Safety of Cofact Under VKA Anticoagulation
This is a randomized, open label, placebo-controlled, parallel design, single center, prospective study. Subjects will receive treatment with VKA. Subjects who reach the targeted INR, will receive single dose of Cofact.
- Trial name
- NCT05205863
- Testing
- Cofact
- Where
- Netherlands
- Volunteers
- 69 people, healthy volunteers welcome
- Sponsor
- Prothya Biosolutions
Obesity, Insulin Resistance
Vitamin K to Slow Progression of Dyslipidemia and Diabetes Risk (Vita-K 'n' Kids Study II)
Animal studies have found that vitamin K-dependent proteins matrix Gla protein and osteocalcin beneficially influence lipid and glucose metabolism, respectively.
- Conditions
- Obesity, Insulin Resistance, Obesity in Diabetes, Nutritional and Metabolic Diseases
- Trial name
- NCT02959762
- Testing
- Low-Dose Vitamin K2 (menaquinone-7; 45-mcg/d), High-Dose Vitamin K2 (menaquinone-7; 90 mcg/d)
- Where
- United States
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Augusta University
Healthy
Pharmacokinetics of Omega-3 Monoglycerides
North American diets have insufficient omega-3 fatty acid (n-3 FA) content. Consequently, they display low plasma concentrations of docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA), the two main long chain n-3 FA.
- Trial name
- NCT04382027
- Testing
- Omega-3 + vitamin K2 (monoacylglycerol form), Omega-3 + vitamin K2 (ethyl ester)
- Where
- Canada
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- Université de Sherbrooke
Bioequivalence, Bioavailability
Bio-equivalence Study
The primary objective of this study is to compare absorption of vitamin K2 (menaquinone-7) after intake of three different vitamin K2 supplements.
- Trial name
- NCT01638143
- Testing
- MenaQ7 M-1500 capsules, Gnosis P-1000 capsules, Gnosis M-1500 capsules
- Where
- Netherlands
- Volunteers
- 24 people, healthy volunteers welcome
- Sponsor
- Maastricht University Medical Center
Bone Loss, Arteriosclerosis
Beneficial Effects of Long Term Menaquinone-7
From all K-vitamins, menaquinone-7 (MK-7) has been identified now as the most effective cofactor for the carboxylation reaction of Gla-proteins such as osteocalcin (in bone) and matrix-Gla protein (in the arterial vessel wall).
- Trial name
- NCT00642551
- Testing
- menaquinone-7
- Where
- Netherlands
- Volunteers
- 240 people, healthy volunteers welcome
- Sponsor
- Maastricht University Medical Center
Healthy
The Efficacy of Vitamin K2 n Human Osteoporosis, Blood-vessel Calcification and Sclerosis
This study used the generally recognized as safe (GRAS) grade of Bacillus subtilis natto to produce Vitamin K2, Menaquinone-7(MK-7), via fermentation, for functional evaluation.
- Trial name
- NCT01928134
- Testing
- Vit K2+ Vit D3+ calcium carbonate (CaCO3), Vit K2+CaCO3
- Where
- Taiwan
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Changhua Christian Hospital
Healthy Women, Osteocalcin
Jarlsberg Cheese Compared to Camembert Cheese
The study objective consists of the following three aims: 1. To compare the effect of daily intake of Jarlsberg cheese and Camembert cheese in change of the Osteocalcin level in healthy women after 6 weeks. 2.
- Trial name
- NCT04189796
- Testing
- Cheese
- Where
- Norway
- Volunteers
- 64 people, healthy volunteers welcome
- Sponsor
- Prof Stig Larsen
Vitamin K-status, Vascular Health
Effects of Dairy on Vitamin K-status
In this study, the beneficial effect of a nutrient enriched dairy product will be investigated on vitamin K-status. To achive this benefit, the study product contains extra vitamin K2.
- Trial name
- NCT01672099
- Testing
- nutrient enriched product, basic dairy product
- Where
- Netherlands
- Volunteers
- 62 people, healthy volunteers welcome
- Sponsor
- Maastricht University Medical Center
Healthy
MaxSimil and Vitamin K2: Determining Their Bioavailability
The benefits of a diet enriched with omega-3 fatty acids are multiple and confirmed by several clinical studies. Supplementation with vitamin K, a fat-soluble vitamin, can increase or maintain bone density in postmenopausal women…
- Trial name
- NCT03897660
- Testing
- Omega-3 + vitamin K2 (TG form of omega-3), Omega-3 + vitamin K2 (EE form of omega-3), Omega-3 + vitamin K2 [MaxSimil (MAG form of omega-3)]
- Where
- Canada
- Volunteers
- 22 people, healthy volunteers welcome
- Sponsor
- Université de Sherbrooke
Socket Preservation
The Local Effect of Vitamin K2 on Bone Remodeling in Socket Preservation
This study is a randomized controlled trial comparing the effects of socket grafting with crushed vitamin K2 (menaquinone)capsules versus no grafting on bone density and socket dimensions following tooth extraction.
- Trial name
- NCT06707909
- Testing
- Menaquinone
- Where
- Egypt
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- Cairo University
Muscle Atrophy, Cachexia
Vitamin K2 Supplements for Muscle Recovery
Ankle injury is one of the most common injuries which can have long term consequences. Ankle immobilization is often applied for up to six weeks to ensure healing of the soft tissue and fractured bones after such an injury.
- Trial name
- Recovery (NCT05161975)
- Testing
- Vitamin K2
- Where
- 2 sites in Lithuania
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Lithuanian Sports University
Carboxylation Level, Vitamin K-dependent Proteins
Comparison of Efficacy of Different Dosages Vitamin K2
Vitamin K is a group name for a number of compounds: K1 is present in chloroplasts in green vegetables, K2 is of microbial origin.
- Trial name
- NCT01194778
- Testing
- vitamin K1, vitamin K2
- Where
- Netherlands
- Volunteers
- 82 people, healthy volunteers welcome
- Sponsor
- Maastricht University Medical Center
Infant Vitamin K Status, Vitamin K Deficiency Bleeding
The OK Daily Study
The OK Daily Study is a multi-centred, part-randomised, part blinded, four cohort study. We are exploring daily dietary supplementation with vitamin K2, specifically menaquinone-7 (MK-7), given to breastfed infants or…
- Trial name
- NCT07620236
- Testing
- Combined MK-7 + vitamin D3 drops, Vitamin D3 Drops, MK-7 capsules
- Volunteers
- 134 people, healthy volunteers welcome
- Sponsor
- Norfolk and Norwich University Hospitals NHS Foundation Trust
Healthy
Comparison of Absorption of Vitamin K2
From previous studies it appeared that menaquinone-7 (MK-7) is the most effective form of vitamin K. The Japanese soya product natto is one of the richest food sources of MK-7.
- Trial name
- NCT00742768
- Testing
- Vitamin K2 in softgel, Vitamin K2 in Gelpell
- Where
- Netherlands
- Volunteers
- 16 people, healthy volunteers welcome
- Sponsor
- Maastricht University Medical Center
Obesity, Insulin Resistance
Vitamin K and Glucose Metabolism in Children at Risk for Diabetes (Vita-K 'n' Kids Study)
The undercarboxylated fractions of the two vitamin K-dependent proteins osteocalcin and matrix Gla protein have been shown to play key roles in type 2 diabetes and cardiovascular disease (at least in mouse models).
- Conditions
- Obesity, Insulin Resistance, Insulin Sensitivity, Prediabetes
- Trial name
- NCT01972113
- Testing
- Low-Dose Vitamin K2 (menaquinone-7; 45 mcg/d), High-Dose Vitamin K2 (menaquinone-7; 90 mcg/d)
- Where
- United States
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Augusta University
Thromboembolism
Genetics Informatics Trial (GIFT) of Warfarin to Prevent DVT
Blood clots contribute to the death of at least 100,000 Americans each year. Because many of these deaths occur suddenly where treatment is impossible, the best treatment is prevention.
- Trial name
- GIFT (NCT01006733)
- Testing
- Pharmacogenetic, Target INR 1.8
- Where
- 6 sites in United States
- Volunteers
- 1,598 people, healthy volunteers welcome
- Sponsor
- Washington University School of Medicine
Healthy
Safety Study of Vitamin K2 During Anticoagulation in Human Volunteers
Oral anticoagulants that are widely used for the treatment of thrombo-embolic disease exert their effect by blocking the recycling of vitamin K.
- Trial name
- NCT00512928
- Testing
- acenocoumarol, menaquinone-7
- Where
- Netherlands
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- Maastricht University
Kidney Calculi, Calcium Oxalate Kidney Stones
Evaluating the Vitamin K2 Status of Calcium-based Stone Formers
This is an observation, single site-study with one study visit during which all data and samples will be collected. Study participants will be asked to provide blood, urine, and fecal samples so that the investigators may study…
- Conditions
- Kidney Calculi, Calcium Oxalate Kidney Stones, Vitamin K 2, Human
- Trial name
- NCT05081960
- Where
- Canada
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- London Health Sciences Centre Research Institute OR Lawson Research Institute of St. Joseph's
Obesity, Insulin Resistance
Vitamin K and Glucose Metabolism in Adults at Risk for Diabetes (Vita-K 'n' Adults Study)
Given that glutamate carboxylation or decarboxylation is key to the metabolic role of osteocalcin (at least in mouse models) and that carboxylation is vitamin K dependent, it is critical to isolate the effect of vitamin K…
- Conditions
- Obesity, Insulin Resistance, Insulin Sensitivity, Beta-Cell Dysfunction
- Trial name
- NCT02366481
- Testing
- Low-Dose Vitamin K2 Supplement (menaquinone-7; 90-mcg/d), High-Dose Vitamin K2 Supplement (menaquinone-7; 180-mcg/d)
- Where
- United States
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Augusta University