About 41% of US adults
have blood vitamin D below the level considered sufficient.
Peer-reviewed analysisCoQ10 is the lead active here, studied most for heart and circulation. Vitamin D3 is the most studied active here, with 20 human studies behind it, each one cited. Each serving carries 500 mcg of Vitamin K2 MK-4, inside the range the published research used. Who it fits: for everyone, adults.
Verified by IngredientMDThe panel on the left is the one we evaluated, line by line.
All 4 actives checked against the clinical evidence: dose, form, and what the research actually shows.
Doses, ratios, and how the ingredients work together. That assessment is the verdict above: "Strong evidence, strong dose".
The verdict is public and identical whether or not a brand pays. A formula that does not clear the bar gets nothing.
Read by the engine against 2.1 million data points from clinical trials, PubMed and more than a hundred vetted sources. No individual reviewer is named or implied.
Cross-checked against 2 documented interactions for these actives.
Public health figures the engine matched to this formula's ingredients. Reported by their source, cited and dated, never written by the brand.
About 41% of US adults
have blood vitamin D below the level considered sufficient.
Peer-reviewed analysis89% of US adults
aged 19 and over consumed more than the recommended 2,300 milligrams of sodium a day, in a CDC analysis of 2009 to 2012 dietary survey data.
CDC Morbidity and Mortality Weekly Report, 201457.6%
During 2017 to 2018, 57.6% of US adults aged 20 and over reported using a dietary supplement in the past 30 days.
CDC National Center for Health Statistics65.5% of US adults aged 20 to 64
had a blood cholesterol check by a health professional in the past 12 months in 2017, up from 58.0% in 2012, in the National Health Interview Survey.
CDC National Center for Health Statistics, 2019Fewer than 1 in 5 US adults
know their cholesterol or blood sugar numbers, according to a national survey fielded for The Ohio State University Wexner Medical Center in December 2023.
SSRS Opinion Panel Omnibus for The Ohio State University Wexner Medical Center, 20239% of US women
and 5% of US men are getting the recommended daily amount of dietary fibre, based on National Health and Nutrition Examination Survey data collected from 2013 to 2018.
American Society for Nutrition, 202159 to 66 days
was the median time it took adults to make a new daily health habit automatic across the studies a 2024 review pooled, with individuals ranging from 4 to 335 days.
Systematic review and meta-analysis, 202461% to 74%
About 61 to 74 percent of adults refilling a long-term medicine on their own stopped within a year, versus 33 to 44 percent on one set pickup day.
Cohort study, 2015Meta-analysis, 2022
Across nine trials in postmenopausal women, vitamin K2 raised lumbar spine bone density by about 2.2 percent and forearm bone density by about 1.6 percent compared with control.
Journal of Bone and Mineral MetabolismSystematic review and meta-analysis, 2024
Improved flow-mediated dilation, a measure of how well arteries widen, by about 1.45 percentage points across 12 randomized trials.
High Blood Press Cardiovasc PrevCohort study, 2025
Habitual natto intake was associated with higher serum MK-7, greater osteocalcin carboxylation and higher bone density measures. This is an observational association and does not establish cause.
Frontiers in NutritionRandomised trial, 2013
In healthy postmenopausal women, three years of 180 micrograms a day of MK-7 slowed bone density loss at the spine and hip, and improved bone strength.
The paperRandomised trial, 2020
In this trial of a low daily MK-7 amount, bone mineral density changed over the study period in the group given it, an imaging measurement, not a clinical event.
Calcified Tissue InternationalMeta-analysis, 2025
Across 17 trials in 440 athletes, CoQ10 lowered muscle damage markers like creatine kinase by about 72 IU/L, though one antioxidant marker showed no detectable change, at low certainty.
Complementary Therapies in Clinical PracticeSystematic review and meta-analysis, 2025
Lowered muscle pain intensity by about 1 point on pooled pain scales across 7 randomized trials in adults taking statins.
J Nutr SciRandomised trial, 2024
In older adults reporting night-time leg cramps, the authors reported a lower frequency of cramps with vitamin K2 than with placebo over the trial period.
JAMA Internal MedicineMeta-analysis, 2024
Across 10 trials in 318 athletes, vitamin D3 raised blood vitamin D by about 14.8 nmol/L and hinted at better muscle strength, though few trials leave that uncertain.
Frontiers in NutritionMeta-analysis, 2014
Pooling 30 trials of 5,615 adults, vitamin D gave a small rise in overall muscle strength, with no measurable effect on muscle mass or power.
Journal of Clinical Endocrinology and MetabolismRandomised trial, 2025
In 38 adults aged 65 to 75 doing eight weeks of interval training, CoQ10 improved chair-stand scores more than placebo, but grip, balance and walking speed did not differ.
NutrientsMeta-analysis, 2024
Coenzyme Q10 was linked to better semen quality measures like sperm count and movement, with a smaller rise in testosterone, across pooled trials in men.
Frontiers in pharmacologyRandomised trial, 2025
Vitamin D3 supplementation changed the inflammatory protein CHI3L1 and oxidative stress markers in adults with a chronic demyelinating condition. These are markers, not clinical outcomes.
Neuropsychopharmacology ReportsMeta-analysis, 2025
Pooling randomised trials, the authors reported that vitamin K2 supplementation shifted bone turnover biochemical markers including undercarboxylated osteocalcin. Turnover markers are laboratory measures rather than fracture outcomes.
Frontiers in EndocrinologyMeta-analysis, 2024
The authors reported site-dependent effects of vitamin K supplementation on bone mineral density and on bone metabolism markers in middle-aged and older adults, with heterogeneity between the included trials.
Bone and Joint ResearchRandomised trial, 2015
Over three years, 180 micrograms a day of MK-7 lowered arterial stiffness measures in healthy postmenopausal women and cut a vitamin K status marker by half compared with placebo.
Thrombosis and HaemostasisMeta-analysis, 2024
Across 20 studies, daily vitamin D3 raised blood vitamin D levels by about 10.4 nmol/L more than the same dose of vitamin D2, roughly 40 percent more.
Advances in NutritionSystematic review, 2026
The review reported that vitamin K effects on glycaemic measures differed between adults with mildly and more markedly raised blood sugar, and the authors describe the evidence as inconsistent.
NutrientsMeta-analysis, 2012
In trials directly comparing the two forms, vitamin D3 raised blood 25-hydroxyvitamin D more than vitamin D2 did (P = 0.001).
American Journal of Clinical NutritionSystematic review, 2025
The review summarises studies relating vitamin K status to low mood measures and reports the available evidence as observational and limited.
MedicinaMeta-analysis, 2014
Across 23 trials of 4,082 adults, vitamin D raised bone mineral density at the femoral neck by about 0.8%, with no measurable change at the spine, hip, or other sites.
LancetRandomised trial, 2026
In 71 young and older adults, 240 micrograms of MK-7 a day for 12 weeks raised circulating MK-7 but showed no measurable effect on muscle strength, physical function, soreness or inflammatory response after muscle-damaging resistance exercise.
Med Sci Sports ExercRandomised trial, 2021
In 68 adults with elevated blood sugar, 360 micrograms of MK-7 a day for 12 weeks produced lipid and glucose index differences that no longer held once baseline values were accounted for, so no effect was detected.
BMC Complement Med TherMeta-analysis, 2026
A combined review across eight reviews found CoQ10 lowered fasting blood sugar by about 5.0 mg/dL and HbA1c by 0.17 percent in adults with high blood sugar, though results varied.
The paperPopulation figures from public health data. Context for the category, not a statement about any individual and not a claim about this product.
Each line below was derived from this formula's own record at the time of verification. Nothing here was written by the brand, and nothing can be added that the evidence does not carry.
One pairing in this formula has been studied as a combination in human trials. Each finding below is what a named study measured, cited and dated, never written by the brand.
In a meta-analysis of eight randomized trials, vitamin K2 taken together with vitamin D raised total bone mineral density and lowered undercarboxylated osteocalcin, a marker of vitamin K status.
Research strength. Research strength says how much work stands behind the combination. It is never a product score.
Fail closed. Where actives were studied on their own rather than together, each shows on its own evidence, never a combined effect no trial measured.
Independent record. Every finding is cited to a named trial, dated, and never written by the brand.
Findings from trials that studied these actives as a combination. Context for how the actives were tested together, not a statement about any individual and not a claim about this product.
Time-to-effect windows the engine read from the trial record. Each is a window a named study measured, cited and dated, never written by the brand.
In the trial record, blood vitamin D rises for about 3 months of daily vitamin D3 and then holds at a plateau, near 69 nmol/L at 1,000 IU a day, from a starting level near 41 nmol/L.
A double-blind randomised dose-finding trial gave 60 postmenopausal women aged 50 to 69 either 0, 50, 100 or 200 micrograms of menaquinone-7 daily for four weeks on a controlled diet. The ratio of carboxylated to undercarboxylated osteocalcin rose dose dependently, with significant differences from the 0 microgram group at 100 and 200 micrograms. A companion 12-week trial in 120 people aged 20 to 69 confirmed the change at 100 micrograms daily. Both studies were run by authors affiliated with the R and D division of J-Oil Mills. An independent 8-week double-blind trial in 55 healthy prepubertal children found the same direction at 45 micrograms daily. What was measured is a blood marker of vitamin K status, not bone density and not a sensation.
A double-blind randomised trial gave 244 healthy postmenopausal women either placebo or 180 micrograms of menaquinone-7 daily for three years, with bone mineral density measured by DXA at baseline and after each year. Menaquinone-7 decreased the age-related decline in bone mineral content and bone mineral density at the lumbar spine and femoral neck, but not at the total hip. The effect is a slowed decline rather than a gain, and the trial ran three years rather than weeks.
Windows measured in the cited trials. Context for how the active behaves over time, not a statement about any individual and not a claim about this product.
Four ingredients, from each one's own page.
25-hydroxyvitamin D climbs over roughly six to twelve weeks of daily dosing before it plateaus. It's a blood level you watch rather than a feeling.
Plasma MK-7 climbs within days of the first dose. The marker that tracks the job, undercarboxylated osteocalcin, falls over roughly four to eight weeks.
Days for absorption, weeks for the marker. Undercarboxylated osteocalcin falls across roughly four to twelve weeks of daily intake, and that is a status marker rather than an outcome.
Blood levels climb within two to three weeks of daily use. Where people report a difference in energy, it tends to land somewhere in weeks four to eight.
How each ingredient usually behaves over time, from its own page on IngredientMD. General timing for the ingredient, not a measurement of this product.
What each form is, and where it fits in a formula. Measured findings carry the study that reported them.
The animal-sourced form of vitamin D, made in skin under UVB light and produced commercially from lanolin. Fat-soluble, so it travels with dietary fat and is stored in body fat.
In a 12-week double-blind randomised controlled trial in 108 young women in urban Bangalore, most of whom began vitamin D-deficient, daily vitamin D3 at 400, 600 or 800 IU in a fortified wafer raised serum 25-hydroxyvitamin D, parathyroid hormone fell over time, and effects on bone-turnover markers were modest and not dose specific. The 800 IU dose brought 65 percent of participants to sufficiency.
The oxidised, quinone form of coenzyme Q10: a fat soluble benzoquinone ring carrying a ten unit isoprenoid tail, supplied as a yellow orange crystalline powder made by yeast fermentation. It is the redox form nearly all CoQ10 raw material ships as, and the form used across the long running clinical trial record.
Descriptions of the form itself, read from the cited studies. Not a comparison between products and not a statement about any individual.
It is a liquid, so the serving can be adjusted and it suits anyone who would rather not swallow a capsule.
Put an earned verification on your own product page.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This record is not medical advice. Always consult your healthcare provider before starting any supplement regimen.