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K2 + D3

product on market Tablet or Pill Mason Natural Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 67% of ingredients have research evidence
A Label Compliance Grade

What the Evidence Says

✨ AI-generated · Qwen 3.6 · methodology

Vitamin D3 and K2 work synergistically to support calcium absorption and bone mineralization, with strong evidence supporting their role in skeletal health. Calcium provides the essential mineral building blocks for bone density. Research indicates these ingredients are generally safe when taken as directed.

AI-generated summary based on research evidence. Not medical advice.

Label

Product Label

Label for K2 + D3
Open Full PDF View on NIH DSLD →
Details

Label Data

1 Tablet(s)
Serving Size
100
Servings
Other Combinations
Product Type
67%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

25 mcg (125% DV)
1.7× RDA — within safe limits 608 studies (A:16, B:251)
100 mcg (83% DV)
Within RDA (0.8× RDA) 275 studies (A:9, B:175)
Calcium
34 mg (3% DV)

Other Ingredients

Microcrystalline Cellulose Stearic Acid Croscarmellose Sodium Magnesium Stearate Silicon Dioxide Acacia Corn Starch Tocopherols Medium Chain Triglyceride Oil Sucrose Maltodextrin Sodium Ascorbate
Claims

Label Claims — Verification

Unverified Nutrient
Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Directions: Adults - Take one tablet daily, preferably with food, as a dietary supplement.

Warnings & Precautions

Warning: Do not take Vitamin K if you have liver/ kidney damage or if taking blood thinners such as aspirin, heparin, and Coumadin. Caution: If you are pregnant, nursing, taking any medications or have any medical condition, consult your physician before use.

Discontinue use and consult your physician if any adverse reactions occur.

Keep out of reach of children.

Tamper-evident seal: Do not use product if seal appears tampered with.

Formulation Notes

Cardiovascular & bone health

Guaranteed no added: yeast, soy, wheat, dairy, fish, tree nuts, peanuts, egg, fragrance, artificial colors or flavors, animal products, crustacean shellfish. Sodium free.

Gluten free Soy free

Additional Information

Laboratory Tested Mason Guarantee cGMP Certified Good Manufacturing Practice 5 Star Certified

N

Store in a dry place under controlled room temperature: 20 degrees - 25 degrees C (68 degrees - 77 degrees F).

Please recycle

Metadata

Product Details

UPC / SKU3 11845 16261 8
DSLD Entry Date2024-09-25
Product TypeOther Combinations
FormTablet or Pill
BrandMason Natural
DSLD ID318750
Data Updated2026-04-11
Research

Research Evidence

872
Research Sources
53
Avg Quality
309
Meta Analysis
309
Clinical Trial
111
Rct
71
Systematic Review
55
Guideline
4
Cochrane Review
4
Regulatory Source
2
Other
2
Narrative Review
2
Observational
1
Openfda Safety
A Vitamin D and vitamin D analogues for preventing fractures associated with involutional and post-menopausal osteoporosis
Meta Analysis The Cochrane database of systematic reviews 2009 PubMed DOI
A Vitamin D supplementation for prevention of mortality in adults
Meta Analysis The Cochrane database of systematic reviews 2014 PubMed DOI
A Vitamin D and vitamin D analogues for preventing fractures in post-menopausal women and older men
Meta Analysis The Cochrane database of systematic reviews 2014 PubMed DOI
A Vitamin D supplementation for prevention of cancer in adults
Meta Analysis The Cochrane database of systematic reviews 2014 PubMed DOI
A Interventions for preventing falls in older people in care facilities and hospitals
Meta Analysis The Cochrane database of systematic reviews 2018 PubMed DOI
A Drugs for preventing lung cancer in healthy people
Meta Analysis The Cochrane database of systematic reviews 2020 PubMed DOI
A Vitamin D supplementation for prevention of mortality in adults
Meta Analysis The Cochrane database of systematic reviews 2011 PubMed DOI
A High prevalence of vitamin D deficiency in Asia: A systematic review and meta-analysis
Meta Analysis Critical reviews in food science and nutrition 2023 PubMed DOI
A The effect of vitamin D supplementation on depressive symptoms in adults: A systematic review and meta-analysis of randomized controlled trials
Meta Analysis Critical reviews in food science and nutrition 2023 PubMed DOI
A Interventions for preventing falls in older people living in the community
Meta Analysis The Cochrane database of systematic reviews 2009 PubMed DOI
View all evidence for Vitamin D →
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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.