Vitamin K and Vitamin D3: study protocols
5 study groups took Vitamin K together with Vitamin D3. These are the doses the studies gave. They are not a recommendation.
Dose per serving from research: Vitamin K
5 study groups in 3 studies say how much Vitamin K participants took a day.
These are the doses the studies gave. They are not a recommendation.
Most common: 50 mcg to 100 mcg, 60% of 5 study groups.
| Daily dose | Study groups |
|---|---|
| 50 mcg or less | 1 |
| 50 mcg to 100 mcg | 3 |
| 100 mcg to 250 mcg | 0 |
| 250 mcg to 500 mcg | 1 |
Commonly used together
5 of 5 study groups took Vitamin K and Vitamin D3 with something else, but nothing that 3 or more different studies gave.
5 study groups
| Study | ||||
|---|---|---|---|---|
| Reducing Undercarboxylated Osteocalcin With Vitamin K Supplementation Does Not Promote Lean Tissue Loss or Fat Gain Over 3 Years in Older Women and Men: A Randomized Controlled Trial 2017 · Vitamin K group · Community-dwelling men and women aged 60–80 years | 500 mcg | 400 IU | 3 years | — |
| Assessment of vitamin A, vitamin B(2), vitamin B(12), vitamin K, folate, and choline status following 4 months of multinutrient supplementation in healthy vegans: a randomised, double-blind, placebo-controlled trial 2025 · INT (intervention group; standard and double omega-3 dosage subgroups) · Healthy adults aged 18 years or older who had followed a vegan diet for at least 1 year; no diagnosed vitamin or mineral deficiency | 50 mcg | 50 mcg | 120 days | 35 |
| Osteocalcin carboxylation is not associated with body weight or percent fat changes during weight loss in post-menopausal women 2015 · Caloric restriction-only group (CR) · Sedentary post-menopausal women aged 50–70 years with overweight or obesity (BMI 25–40 kg/m²) | 80 mcg | 200 IU | 20 weeks | — |
| Osteocalcin carboxylation is not associated with body weight or percent fat changes during weight loss in post-menopausal women 2015 · Moderate-intensity exercise group · Sedentary post-menopausal women aged 50–70 years with overweight or obesity (BMI 25–40 kg/m²) | 80 mcg | 200 IU | 20 weeks | — |
| Osteocalcin carboxylation is not associated with body weight or percent fat changes during weight loss in post-menopausal women 2015 · Vigorous-intensity exercise group · Sedentary post-menopausal women aged 50–70 years with overweight or obesity (BMI 25–40 kg/m²) | 80 mcg | 200 IU | 20 weeks | — |