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KD Ultra

4.7
★ ★ ★ ★ ★
(129 ratings)
Vitamin K 100 mcg
Product Image
Score52
An implausible K2 amount and missing K2 form make this record unreliable. Verify the original label before considering use.
How scoring works
Capsule
Quantity:90 Capsule(s) • (90 servings)
Goals:
General Health
Cardiovascular Support
Heart Health
Bone Health

Score 52

An implausible K2 amount and missing K2 form make this record unreliable. Verify the original label before considering use.
How scoring works
$48.00($0.53 per serving)
Vitacost
$ 52.83
iHerb
$ 48.00
Pure Formulas
$ 48.00
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Analysis

The record lists lichen-derived vitamin D3 at 62.5 mcg and phytonadione at 100 mcg. Those two entries could support a coherent formula if the remaining label information were trustworthy.

Vitamin K2 is shown as 1,600 mg with no chemical form, an amount that is not credible for a normal supplement. A zero-quantity lipase entry adds further evidence that the supplied label data may be corrupted or incorrectly mapped.

Do not infer a corrected K2 dose from the product name or surrounding entries. The original package and manufacturer documentation need verification before any capsule is used.

Who is it for
  • No one until the original label is verified
  • Users able to obtain manufacturer-confirmed dosing
  • Clinicians reviewing a corrected product record
Best for
  • Label verification before purchase
  • Corrected-record review
  • Avoidance until dosing is confirmed

Pros

  • Identifies lichen-derived vitamin D3
  • Clearly lists vitamin K1 as phytonadione
  • Uses a one-capsule serving
  • Combines D3 with vitamin K in concept

Cons

  • Lists an implausible 1,600 mg K2 amount
  • Does not identify the K2 form
  • Includes a zero-quantity lipase entry
  • Cannot be safely assessed from supplied data

Warnings

  • Do not use the product based on this record; verify the original label because the stated K2 amount is implausible.
  • Vitamin K can oppose warfarin and related vitamin K antagonists.
  • The 62.5 mcg vitamin D amount should still be counted toward total intake if the corrected product is used.

Nutrient quality

52 Moderate impact

Lichen-derived vitamin D3 is useful, while the vitamin K2 form is unspecified. Vitamin D3 and vitamin K1 are meaningful, but the vitamin K2 entry is not credible as written.

Ingredient transparency

60 Moderate impact

Amounts are listed, but the implausible vitamin K2 value and undosed lipase make the label unreliable. Inactive capsule ingredients are not supplied.

Customer satisfaction

62 Moderate impact

The supplied average indicates generally favorable aggregate satisfaction. No detailed experience reports are available to identify repeated complaints or confirm perceived benefits.

Value for money

29 Situational impact

Unreliable label data and an undosed enzyme do not justify the premium cost. Serving value is weak for a formula that requires label verification.

Report analysis

Goals

General Health
General Health
Impact
Moderate effect
B Goal FitF Strength of SupportD+ CoverageA- Formula Quality
Vitamin D · 62.5 mcgVitamin K · 1600 mg

Vitamin D3 and vitamins K1 and K2 form a logical combination for calcium handling and skeletal support. The D3 amount is clearly shown, but the K2 subtype is missing and the listed K2 amount is extraordinarily high.

The package should be checked before use because the reported K2 quantity may reflect a label or data error. Vitamin K can counteract warfarin and related vitamin K antagonist medicines, so users of those drugs need clinician-guided consistency.

Study evidence
Vitamin D Supportive 115 studies
Vitamin K Supportive 34 studies
Cardiovascular Support
Cardiovascular Support
Impact
Moderate effect
B+ Goal FitF Strength of SupportD+ CoverageB- Formula Quality
Vitamin K · 1600 mgVitamin D · 62.5 mcg

Vitamin K2 is relevant to calcium handling in blood vessels, while vitamin D3 provides a complementary calcium-regulation pathway. The label does not identify the K2 subtype, which limits confidence in absorption and active quality.

The listed K2 amount is extraordinarily high and may reflect a label-data error, so the package amount should be confirmed before use. Vitamin K can counteract warfarin and related vitamin K antagonists.

Study evidence
Vitamin K Supportive 40 studies
Heart Health
Heart Health
Impact
Moderate effect
B+ Goal FitF Strength of SupportD- CoverageB Formula Quality
Vitamin K · 1600 mgVitamin D · 62.5 mcg

Vitamin D3 and vitamin K have a relevant calcium-management rationale for arterial health. The listed 1,600 mg K2 amount is extraordinarily high and should be verified directly on the package before use.

The K2 subtype is not identified, so absorption and evidence alignment cannot be judged. Vitamin K can counteract warfarin and related vitamin K antagonists, making clinician-guided consistency essential for users of those medicines.

Study evidence
Vitamin D Mixed 164 studies
Vitamin K Mixed 62 studies
Bone Health
Bone Health
Impact
Moderate effect
C+ Goal FitF Strength of SupportD CoverageD+ Formula Quality
Vitamin K · 1600 mgVitamin D · 62.5 mcg

Vitamin D3 with vitamin K targets calcium absorption and placement, but the K2 subtype is not identified. The reported K2 amount is extraordinarily high and should be confirmed on the physical label before use.

The formula does not provide calcium, magnesium, or collagen. People using warfarin or another vitamin K antagonist need clinician-guided consistency because this vitamin K formula can change anticoagulant control.

Study evidence
Vitamin D Supportive 202 studies
Vitamin K Supportive 78 studies

Ingredients

IngredientAmount per serving
Vitamin D3 (Lichen)
 62.5 mcg
Vitamin K (Phytonadione)
 100 mcg
Vitamin K2
1600 mg
Lipase
0 NP
Gluten Free Adults 18–50 Vegan Kosher Dairy Free Vegetarian
Report overview
Vitamin K (Phytonadione) · 100 mcg OverallScore17
F Active Ingredient Quality & BioavailabilityF Dose, Safety & Label TransparencyF Value

The label separates K1 from K2 but does not name MK-4 or MK-7, so absorption quality and effective MK-7 dosing cannot be verified. The listed K2 amount is extraordinarily high and should be confirmed on the package before use. Vitamin K can counteract warfarin and related vitamin K antagonists, making clinician-guided consistency important for users of those medicines.

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Loading alternative details
87 Performance

Vitamin K2 100 mcg

SR Sports Research
<p>The formula provides 100 mcg of Vitamin K2 (Menaquinone-7), which may be a better fit than the original’s 100 mcg of Vitamin K (Phytonadione), 1600 mg of Vitamin K2, and 62.50 mcg of Vitamin D3 (Lichen) when its specific vitamin K form and companion nutrients are preferred. Vitamin K may interfere with warfarin-type anticoagulants, so people using them need clinician-directed intake.</p>
86 Performance

Vitamin K2 MK-7 (Menaquinone-7) 90 mcg

Carlson
<p>The formula provides 90 mcg of Vitamin K2 (Menaquinone-7), which may be a better fit than the original’s 100 mcg of Vitamin K (Phytonadione), 1600 mg of Vitamin K2, and 62.50 mcg of Vitamin D3 (Lichen) when its specific vitamin K form and companion nutrients are preferred. Vitamin K may interfere with warfarin-type anticoagulants, so people using them need clinician-directed intake.</p>
87 Performance

Vitamin K2 as MK-7 100 mcg

Healthy Origins
<p>The formula provides 100 mcg of Vitamin K2 (Menaquinone-7), which may be a better fit than the original’s 100 mcg of Vitamin K (Phytonadione), 1600 mg of Vitamin K2, and 62.50 mcg of Vitamin D3 (Lichen) when its specific vitamin K form and companion nutrients are preferred. Vitamin K may interfere with warfarin-type anticoagulants, so people using them need clinician-directed intake.</p>
88 Budget

Vitamin K2 MK-7 100 mcg

Nutricost
<p>At a lower recurring cost, the formula provides 100 mcg of Vitamin K (Menaquinone-7), making it a practical budget alternative to the original’s 100 mcg of Vitamin K (Phytonadione), 1600 mg of Vitamin K2, and 62.50 mcg of Vitamin D3 (Lichen). Vitamin K may interfere with warfarin-type anticoagulants, so people using them need clinician-directed intake.</p>
87 Budget

MK-7 Vitamin K-2 100 mcg

NOW
<p>At a lower recurring cost, the formula provides 100 mcg of Vitamin K2 (Menaquinone-7), making it a practical budget alternative to the original’s 100 mcg of Vitamin K (Phytonadione), 1600 mg of Vitamin K2, and 62.50 mcg of Vitamin D3 (Lichen). Vitamin K may interfere with warfarin-type anticoagulants, so people using them need clinician-directed intake.</p>
85 Budget

Vitamin K2 MenaQ7 100 mcg

AN Amazing Nutrition Amazing Formulas
<p>At a lower recurring cost, the formula provides 100 mcg of Vitamin K2 (Natto), making it a practical budget alternative to the original’s 100 mcg of Vitamin K (Phytonadione), 1600 mg of Vitamin K2, and 62.50 mcg of Vitamin D3 (Lichen). Vitamin K may interfere with warfarin-type anticoagulants, so people using them need clinician-directed intake.</p>
86 Value

Vitamins D3 2500 IU (62.5 mcg) & K2 120 mcg

NaturesPlus
<p>The formula combines 120 mcg of Vitamin K2 (Menaquinone-7) and 62.50 mcg of Vitamin D3 (Cholecalciferol) with favorable serving value, which may offer a better quality-to-cost balance than the original’s 100 mcg of Vitamin K (Phytonadione), 1600 mg of Vitamin K2, and 62.50 mcg of Vitamin D3 (Lichen). Vitamin K may interfere with warfarin-type anticoagulants, so people using them need clinician-directed intake.</p>
87 Value

MK-7 Vitamin K-2 100 mcg

NOW
<p>The formula combines 100 mcg of Vitamin K-2 (Menaquinone-7) with favorable serving value, which may offer a better quality-to-cost balance than the original’s 100 mcg of Vitamin K (Phytonadione), 1600 mg of Vitamin K2, and 62.50 mcg of Vitamin D3 (Lichen). Vitamin K may interfere with warfarin-type anticoagulants, so people using them need clinician-directed intake.</p>
86 Value

Vitamin K2 100 mcg + Vitamin D3 125 mcg

Nutricost
<p>The formula combines 100 mcg of Vitamin K (Menaquinone-7) and 125 mcg of Vitamin D (Cholecalciferol) with favorable serving value, which may offer a better quality-to-cost balance than the original’s 100 mcg of Vitamin K (Phytonadione), 1600 mg of Vitamin K2, and 62.50 mcg of Vitamin D3 (Lichen). The high vitamin D amount warrants attention to total intake, and vitamin K may interfere with warfarin-type anticoagulants.</p>
Report alternatives

Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. Three-year low-dose menaquinone-7 supplementation helps decrease bone loss in healthy postmenopausal women.
    Knapen MH; Drummen NE; Smit E; Vermeer C; Theuwissen E · Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2014
    Randomized trial244 participantsBone Health forVitamin K
  2. Investigating the interrelationship of vitamin K and vitamin D status on bone density: results from the VITamin D and OmegA-3 TriaL.
    Chou SH; Booth SL; Cook NR; Kim E; Kotler G; Fu X; Buring JE; Manson JE; LeBoff MS · JBMR plus · 2026
    Randomized trial771 participantsBone Health forVitamin K
  3. Efficacy and safety of vitamin K2 for postmenopausal women with osteoporosis at a long-term follow-up: meta-analysis and systematic review.
    Zhou M; Han S; Zhang W; Wu D · Journal of bone and mineral metabolism · 2022
    Meta-analysis6,853 participants9 studies pooledBone Health forVitamin K
  4. Pregnancy vitamin D supplementation and offspring bone mineral density in childhood follow-up of a randomized controlled trial.
    Moon RJ; D' Angelo S; Curtis EM; Ward KA; Crozier SR; Schoenmakers I; Javaid MK; Bishop NJ; Godfrey KM; Cooper C; Harvey NC; MAVIDOS Trial Group · The American journal of clinical nutrition · 2024
    Randomized trial454 participantsBone Health forVitamin D
  5. Vitamin D analogs and bone: preclinical and clinical studies with eldecalcitol.
    Matsumoto T; Takano T; Saito H; Takahashi F · BoneKEy reports · 2014
    Narrative reviewBone Health forVitamin D
  6. Efficacy of vitamin D fortified foods on bone mineral density and serum bone biomarkers: A systematic review and meta-analysis of interventional studies.
    Tangestani H; Djafarian K; Emamat H; Arabzadegan N; Shab-Bidar S · Critical reviews in food science and nutrition · 2020
    Meta-analysis1,786 participants20 studies pooledBone Health forVitamin D
  7. Cholecalciferol Supplementation Attenuates Bone Loss in Incident Kidney Transplant Recipients: A Prespecified Secondary Endpoint Analysis of a Randomized Controlled Trial.
    Tsujita M; Doi Y; Obi Y; Hamano T; Tomosugi T; Futamura K; Okada M; Hiramitsu T; Goto N; Isaka Y; Takeda A; Narumi S; Watarai Y · Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research · 2022
    Randomized trial193 participantsBone Health forVitamin D
  8. Vitamin D supplementation and bone health in post-menopausal women: a 24-month randomized controlled intervention with enhanced bioavailability formulations.
    Rasool N; Munir Y · European journal of clinical nutrition · 2026
    Randomized trial612 participantsBone Health forVitamin D
  9. Vitamin K and the prevention of fractures: systematic review and meta-analysis of randomized controlled trials.
    Cockayne S; Adamson J; Lanham-New S; Shearer MJ; Gilbody S; Torgerson DJ · Archives of internal medicine · 2006
    Meta-analysis13 studies pooledBone Health forVitamin K
  10. Effect of combined administration of vitamin D3 and vitamin K2 on bone mineral density of the lumbar spine in postmenopausal women with osteoporosis.
    Iwamoto J; Takeda T; Ichimura S · Journal of orthopaedic science : official journal of the Japanese Orthopaedic Association · 2001
    Randomized trial92 participantsBone Health forVitamin K
  11. Low-dose vitamin K2 (MK-4) supplementation for 12 months improves bone metabolism and prevents forearm bone loss in postmenopausal Japanese women.
    Koitaya N; Sekiguchi M; Tousen Y; Nishide Y; Morita A; Yamauchi J; Gando Y; Miyachi M; Aoki M; Komatsu M; Watanabe F; Morishita K; Ishimi Y · Journal of bone and mineral metabolism · 2015
    Randomized trial48 participantsBone Health forVitamin K
  12. Vitamin K Intake and Atherosclerotic Cardiovascular Disease in the Danish Diet Cancer and Health Study.
    Bellinge JW; Dalgaard F; Murray K; Connolly E; Blekkenhorst LC; Bondonno CP; Lewis JR; Sim M; Croft KD; Gislason G; Torp-Pedersen C; Tjønneland A; Overvad K; Hodgson JM; Schultz C; Bondonno NP · Journal of the American Heart Association · 2021
    Cohort study53,372 participantsCardiovascular Support Heart Health forVitamin K
  13. Menaquinone-7 supplementation improves arterial stiffness in healthy postmenopausal women. A double-blind randomised clinical trial.
    Knapen MH; Braam LA; Drummen NE; Bekers O; Hoeks AP; Vermeer C · Thrombosis and haemostasis · 2016
    Randomized trial244 participantsCardiovascular Support Heart Health forVitamin K
  14. Effects of One-Year Menaquinone-7 Supplementation on Vascular Stiffness and Blood Pressure in Post-Menopausal Women.
    de Vries F; Bittner R; Maresz K; Machuron F; Gåserød O; Jeanne JF; Schurgers LJ · Nutrients · 2025
    Randomized trial165 participantsCardiovascular Support forVitamin K
  15. Dietary Vitamin K1 Intake and Incident Aortic Valve Stenosis.
    Schultz CJ; Dalgaard F; Bellinge JW; Murray K; Sim M; Connolly E; Blekkenhorst LC; Bondonno CP; Lewis JR; Gislason GH; Tjønneland A; Overvad K; Hodgson JM; Bondonno NP · Arteriosclerosis, thrombosis, and vascular biology · 2024
    Cohort study55,545 participantsCardiovascular Support Heart Health forVitamin K
  16. Association between vitamin K1 intake and mortality in the Danish Diet, Cancer, and Health cohort.
    Palmer CR; Bellinge JW; Dalgaard F; Sim M; Murray K; Connolly E; Blekkenhorst LC; Bondonno CP; Croft KD; Gislason G; Tjønneland A; Overvad K; Schultz C; Lewis JR; Hodgson JM; Bondonno NP · European journal of epidemiology · 2021
    Cohort study56,048 participantsCardiovascular Support Heart Health forVitamin K
  17. Vitamin D supplementation for prevention of mortality in adults.
    Bjelakovic G; Gluud LL; Nikolova D; Whitfield K; Wetterslev J; Simonetti RG; Bjelakovic M; Gluud C · The Cochrane database of systematic reviews · 2014
    Meta-analysis95,286 participants159 studies pooledGeneral Health forVitamin D
  18. Effect of vitamin D on gastrointestinal symptoms and health-related quality of life in irritable bowel syndrome patients: a randomized double-blind clinical trial.
    Abbasnezhad A; Amani R; Hajiani E; Alavinejad P; Cheraghian B; Ghadiri A · Neurogastroenterology and motility · 2018
    Randomized trial90 participantsGeneral Health forVitamin D
  19. The impact of vitamin D administration on mortality in COVID-19 patients: a systematic review and meta-analysis of randomized controlled trials.
    Kow CS; Ramachandram DS; Hasan SS; Wong Z; Thiruchelvam K · Inflammopharmacology · 2024
    Meta-analysis2,495 participants19 studies pooledGeneral Health forVitamin D
  20. Vitamin D Status and Mortality: A Systematic Review of Observational Studies.
    Heath AK; Kim IY; Hodge AM; English DR; Muller DC · International journal of environmental research and public health · 2019
    Systematic review84 studies pooledGeneral Health forVitamin D
  21. Meta-analysis of long-term vitamin D supplementation on overall mortality.
    Zheng Y; Zhu J; Zhou M; Cui L; Yao W; Liu Y · PloS one · 2014
    Meta-analysis42 studies pooledGeneral Health forVitamin D
  22. Dietary vitamin K intake associates with reduced all-cause mortality in non-alcoholic fatty liver disease patients.
    Huang Y; Zhu X; Han L; Hu H · Scientific reports · 2025
    Cohort study7,857 participantsGeneral Health forVitamin K
  23. Vitamin K status, cardiovascular disease, and all-cause mortality: a participant-level meta-analysis of 3 US cohorts.
    Shea MK; Barger K; Booth SL; Matuszek G; Cushman M; Benjamin EJ; Kritchevsky SB; Weiner DE · The American journal of clinical nutrition · 2020
    Meta-analysis3,891 participants3 studies pooledGeneral Health forVitamin K
  24. The Effect of Topical Vitamin K1 on the Treatment of Cetuximab-Induced Skin Rashes in Metastatic Colorectal Cancer Patients.
    Roayaei M; Rezaei M; Najafizade N · Advanced biomedical research · 2024
    Randomized trial49 participantsGeneral Health forVitamin K
  25. Effect of vitamin K on improving post‑kidney transplant outcomes: a meta‑analysis.
    Sun Z; Zhu K; Liang G; Yan F; Chao S; Jia L; Niu Y · Experimental and therapeutic medicine · 2023
    Meta-analysis7 studies pooledGeneral Health forVitamin K
  26. Vitamin K1 intake is associated with lower risk for all-cause and cardiovascular disease mortality in community-dwelling older Australian women.
    Dupuy M; Radavelli-Bagatini S; Zhong L; Dalla Via J; Zhu K; Blekkenhorst LC; Bondonno NP; Linneberg A; Bellinge JW; Schultz C; Courtney W; Prince RL; Hodgson JM; Lewis JR; Sim M · Nutrition, metabolism, and cardiovascular diseases : NMCD · 2024
    Cohort study1,436 participantsGeneral Health forVitamin K
  27. Vitamin D supplementation for cardiometabolic risk markers in pregnant women based on the gestational diabetes mellitus or obesity status : a randomized clinical trial.
    Yin WJ; Wang P; Ma SS; Tao RX; Hu HL; Jiang XM; Zhang Y; Tao FB; Zhu P · European journal of nutrition · 2024
    Randomized trial1,537 participantsHeart Health forVitamin D
  28. Paricalcitol and endothelial function in chronic kidney disease trial.
    Zoccali C; Curatola G; Panuccio V; Tripepi R; Pizzini P; Versace M; Bolignano D; Cutrupi S; Politi R; Tripepi G; Ghiadoni L; Thadhani R; Mallamaci F · Hypertension (Dallas, Tex. : 1979) · 2015
    Randomized trial88 participantsHeart Health forVitamin D
  29. Vitamin D Supplementation, Serum 25(OH)D Concentrations and Cardiovascular Disease Risk Factors: A Systematic Review and Meta-Analysis.
    Mirhosseini N; Rainsbury J; Kimball SM · Frontiers in cardiovascular medicine · 2020
    Meta-analysis81 studies pooledHeart Health forVitamin D
  30. Does vitamin D supplementation modulate metabolic risk factors of cardiovascular disease? A systematic review and meta-analysis of clinical trials.
    Abumweis S; Alqadi S; Al Tarteer A; Alrefai W; Alzoughool F; Jew S; Qudah T · Asia Pacific journal of clinical nutrition · 2026
    Meta-analysis45 studies pooledHeart Health forVitamin D
  31. Comparative Efficacy of Nutraceuticals on Endothelial Function: A Systematic Review and Network Meta-Analysis.
    Norouzzadeh M; Rashedi MH; Mahdavi-Mazdeh G; Kosari A; Shahinfar H · Current atherosclerosis reports · 2026
    Meta-analysisHeart Health forVitamin D
  32. The effect of vitamin K1 on arterial calcification activity in subjects with diabetes mellitus: a post hoc analysis of a double-blind, randomized, placebo-controlled trial.
    Bellinge JW; Francis RJ; Lee SC; Bondonno NP; Sim M; Lewis JR; Watts GF; Schultz CJ · The American journal of clinical nutrition · 2022
    Randomized trial149 participantsHeart Health forVitamin K