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K D Optimal

product on market Capsule NHC Natural Healthy Concepts Safety: 80/100
80/100

This product is generally safe

  • Vitamin D: 0.125mg is 1.2× the Tolerable Upper Intake Level (0.1mg)
  • 100% of ingredients have research evidence
C Label Compliance Grade

What the Evidence Says

✨ AI-generated · Qwen 3.6 · grounded in 1 source · methodology

Vitamin D and K2 are supported by strong evidence for promoting calcium absorption and bone health. These nutrients work synergistically to ensure calcium is deposited in the bones rather than arteries. Research indicates this combination is generally safe for most adults when taken as directed.

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

Alerts

Safety Alerts

Vitamin D: 0.125mg is 1.2× the Tolerable Upper Intake Level (0.1mg)

Label

Product Label

Label for K D Optimal
Open Full PDF View on NIH DSLD →
Details

Label Data

1 Capsule(s)
Serving Size
60
Servings
Vitamin
Product Type
100%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

125 mcg (625% DV)
Exceeds UL by 1.2× (UL: 0.1 mg) 608 studies (A:16, B:251)
180 mcg
1.5× RDA — within safe limits 275 studies (A:9, B:175)

Other Ingredients

Hypromellose Microcrystalline Cellulose Magnesium Stearate Silicon Dioxide Stearic Acid Turmeric extract
Claims

Label Claims — Verification

Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Suggested use: 1 capsules per day or as recommended by your health care professional.

Warnings & Precautions

Do not consume this product if you are pregnant or nursing.

Consult your physician for further information.

As with all dietary supplements, some individuals may not tolerate or may be allergic to the ingredients used. Please read the ingredients panel carefully prior to ingestion. Cease taking this product and consult your physician if you have negative reactions upon ingestion.

Keep out of reach of children.

This product was sealed for your protection. Do not use if outer logoed neck seal or inner-seal is missing or damaged.

Warning: All forms of Vitamin K may interact with blood thinning medications. If you are taking such medications please consult with your physician before taking this product.

Formulation Notes

Formulated to be free of allergens derived from: gluten, corn, yeast, artificial colors and flavors.

Vcaps (vegetarian)

Additional Information

Keep container tightly closed. Store at room temperature.

Professional use only

Vcaps (vegetarian)

Metadata

Product Details

UPC / SKU6 47732 92531 9
DSLD Entry Date2021-11-19
Product TypeVitamin
FormCapsule
BrandNHC Natural Healthy Concepts
DSLD ID256076
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.