Home/ Supplements/ Vitamin K/ Ultra-Cal Night With Vitamin K

Ultra-Cal Night With Vitamin K

product on market Tablet or Pill Source Naturals Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 47% of ingredients have research evidence
A Label Compliance Grade

What the Evidence Says

✨ AI-generated · Qwen 3.6 · methodology

This formula contains Vitamin D3 and K-1, which have strong evidence for supporting bone health and calcium regulation. Vitamin C provides antioxidant support to protect cells from oxidative stress. Research indicates these nutrients are generally safe and effective when taken within recommended daily limits.

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

Label

Product Label

Label for Ultra-Cal Night With Vitamin K
Open Full PDF View on NIH DSLD →
Details

Label Data

2 Tablet(s)
Serving Size
30
Servings
Botanical with Nutrients
Product Type
47%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

Calories
10 Calorie(s)
Total Carbohydrates
2 Gram(s) (1% DV)
Vitamin C
144 mg (240% DV)
100 IU (25% DV)
Within RDA (0.2× RDA) 608 studies (A:16, B:251)
500 mcg (625% DV)
4.2× RDA — above typical dose 275 studies (A:9, B:175)
10 mg (500% DV)
7.7× RDA — above typical dose (UL: 100 mg) 114 studies (A:3, B:35)
100 mcg (25% DV)
Within RDA (0.2× RDA) 226 studies (A:10, B:105)
Calcium
300 mg (30% DV)
300 mg (75% DV)
Within RDA (0.7× RDA) 316 studies (A:8, B:159)
4 mg (27% DV)
Within RDA (0.4× RDA) 263 studies (A:6, B:134)
500 mcg (25% DV)
Within RDA (0.6× RDA) 37 studies (A:0, B:11)
4 mg (200% DV)
1.7× RDA — within safe limits 9 studies — no high-quality reviews
Sodium
5 mg (1% DV)
SoyLife non-GMO Isoflavone Complex
414 mg
30 mg
Market median: 500.0mg (159 products)
4 mg
Market median: 108.0mg (8 products) 9 studies (A:0, B:4)
1.5 mg
Market median: 3.0mg (58 products) 3 studies — no high-quality reviews

Other Ingredients

Stearic Acid modified Cellulose Gum Acacia Gum Sorbitol Silica Magnesium Stearate
Claims

Label Claims — Verification

Unverified Nutrient
Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Ultra-Cal Night is specifically designed to be taken at night.

Suggested Use: To maximize calcium utilization, take 1 tablet at breakfast and dinner, and 2 tablets at bedtime.

Warnings & Precautions

Caution: If you are taking anticoagulant drugs, such as warfarin (Coumadin), or if you are pregnant, may become pregnant, or breastfeeding, consult your health care professional before using this product.

If you experience an uncomfortable laxative effect, simply decrease your dosage.

Do not use if either tamper-evident seal is broken or missing.

Keep out of the reach of children.

Contains soy.

Formulation Notes

Non-GMO soy

With vitamin K

Ultra-Cal Night is a scientifically advanced calcium formula, providing optimal forms of calcium and key co-nutrients to help support a healthy skeletal system.

Ultra-Cal Night contains a 1:1 ratio of calcium and magnesium, along with other bone minerals such as copper, manganese and zinc, and soy isoflavones to provide support for bones.

Contains soy.

Additional Information

Superior bioactivity

Krebs cycle calcium complex

Most of the minerals are bound to organic compounds of the Krebs cycle (cellular energy production system), allowing for optimal absorption and utilization.

Research indicates that food eaten during the day usually maintains adequate calcium levels in the blood. Taking calcium supplements at night offers added protection until breakfast.

Not genetically modified

SN1852 REV G173-B

Metadata

Product Details

UPC / SKU0 21078 01852 0
DSLD Entry Date2017-09-21
Product TypeBotanical with Nutrients
FormTablet or Pill
BrandSource Naturals
DSLD ID78778
Data Updated2026-04-11
Research

Research Evidence

332
Research Sources
59
Avg Quality
220
Meta Analysis
56
Systematic Review
30
Rct
16
Clinical Trial
3
Guideline
3
Regulatory Source
1
Narrative Review
1
Other
1
Openfda Safety
A Duration of treatment with vitamin K antagonists in symptomatic venous thromboembolism
Meta Analysis The Cochrane database of systematic reviews 2014 PubMed DOI
A Antiplatelet and anticoagulant agents for secondary prevention of stroke and other thromboembolic events in people with antiphospholipid syndrome
Meta Analysis The Cochrane database of systematic reviews 2017 PubMed DOI
A Anticoagulants (extended duration) for prevention of venous thromboembolism following total hip or knee replacement or hip fracture repair
Meta Analysis The Cochrane database of systematic reviews 2016 PubMed DOI
A Antiplatelet and anticoagulant agents for secondary prevention of stroke and other thromboembolic events in people with antiphospholipid syndrome
Meta Analysis The Cochrane database of systematic reviews 2020 PubMed DOI
A Direct factor Xa inhibitors versus low molecular weight heparins or vitamin K antagonists for prevention of venous thromboembolism in elective primary hip or knee replacement or hip fracture repair
Meta Analysis The Cochrane database of systematic reviews 2025 PubMed DOI
A Factor Xa inhibitors versus vitamin K antagonists for preventing cerebral or systemic embolism in patients with atrial fibrillation
Meta Analysis The Cochrane database of systematic reviews 2018 PubMed DOI
A Antiplatelet agents and anticoagulants for hypertension
Systematic Review The Cochrane database of systematic reviews 2022 PubMed DOI
A Primary prophylaxis for venous thromboembolism in ambulatory cancer patients receiving chemotherapy
Meta Analysis The Cochrane database of systematic reviews 2012 PubMed DOI
A Factor Xa inhibitors versus vitamin K antagonists for preventing cerebral or systemic embolism in patients with atrial fibrillation
Meta Analysis The Cochrane database of systematic reviews 2013 PubMed DOI
A Anticoagulation for the long-term treatment of venous thromboembolism in patients with cancer
Meta Analysis The Cochrane database of systematic reviews 2014 PubMed DOI
View all evidence for Vitamin K →
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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.