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OsCal Pro

product on market Capsule Guardian Health Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 57% of ingredients have research evidence
A Label Compliance Grade

What the Evidence Says

✨ AI-generated · Qwen 3.6 · methodology

Calcium, Vitamin D3, and Vitamin K2 are supported by strong evidence for maintaining bone density and mineral absorption. Magnesium and phosphorus further contribute to skeletal structural integrity. Research indicates these nutrients work synergistically to support bone health.

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

Label

Product Label

Label for OsCal Pro
Open Full PDF View on NIH DSLD →
Details

Label Data

4 Capsule(s)
Serving Size
30
Servings
Other Combinations
Product Type
57%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

Calcium
400 mg (31% DV)
27 mcg (135% DV)
1.8× RDA — within safe limits 608 studies (A:16, B:251)
64 mcg (53% DV)
Within RDA (0.5× RDA) 275 studies (A:9, B:175)
164 mg (13% DV)
Within RDA (0.2× RDA) 13 studies (A:0, B:3)
200 mg (48% DV)
Within RDA (0.5× RDA) 316 studies (A:8, B:159)
100 mcg
Market median: 3.0mg (58 products) 3 studies — no high-quality reviews
Cissus quadrangularis extract
150 mg

Other Ingredients

Brown Rice Flour Magnesium Stearate Silicon Dioxide Dicalcium Phosphate Maltodextrin Water
Claims

Label Claims — Verification

Unverified Nutrient
Unverified All Other
Info

Product Information

Directions for Use

Suggested Use: As a dietary supplement, take 4 capsules per day, preferably with a low fiber meal or before sleep.

Warnings & Precautions

Keep out of reach of children.

Warning: If you are pregnant, lactating, or have serious medical condition, you should not use this product before consulting a physician.

Formulation Notes

MCHCal Microcrystalline Hydroxyapatite Calcium

Additional Information

Store in a cool dry place below 30 degrees C (86 degrees F) and avoid exposure to sunlight.

Made In USA With Globally Sourced Ingredients

Metadata

Product Details

UPC / SKU8 18174 02037 9
DSLD Entry Date2023-11-22
Product TypeOther Combinations
FormCapsule
BrandGuardian Health
DSLD ID299125
Data Updated2026-04-11
Research

Research Evidence

849
Research Sources
56
Avg Quality
450
Meta Analysis
152
Rct
137
Systematic Review
73
Clinical Trial
11
Regulatory Source
7
Other
7
Guideline
3
Openfda Safety
2
Cochrane Review
2
Observational
A Phosphate binders for preventing and treating chronic kidney disease-mineral and bone disorder (CKD-MBD)
Meta Analysis The Cochrane database of systematic reviews 2018 PubMed DOI
A Calcium supplementation (other than for preventing or treating hypertension) for improving pregnancy and infant outcomes
Meta Analysis The Cochrane database of systematic reviews 2024 PubMed DOI
A Calcium supplementation (other than for preventing or treating hypertension) for improving pregnancy and infant outcomes
Meta Analysis The Cochrane database of systematic reviews 2015 PubMed DOI
A Vitamin and mineral supplementation for maintaining cognitive function in cognitively healthy people in mid and late life
Meta Analysis The Cochrane database of systematic reviews 2018 PubMed DOI
A Calcium supplementation during pregnancy for preventing hypertensive disorders and related problems
Meta Analysis The Cochrane database of systematic reviews 2025 PubMed DOI
A Dietary calcium supplementation for preventing colorectal cancer and adenomatous polyps
Systematic Review The Cochrane database of systematic reviews 2008 PubMed DOI
A Calcium and vitamin D for increasing bone mineral density in premenopausal women
Systematic Review The Cochrane database of systematic reviews 2023 PubMed DOI
A Dietary sodium, sodium-to-potassium ratio, and risk of stroke: A systematic review and nonlinear dose-response meta-analysis
Meta Analysis Clinical nutrition (Edinburgh, Scotland) 2019 PubMed DOI
A The association between circulating magnesium and clinically relevant outcomes in patients with chronic kidney disease: A systematic review and meta-analysis
Meta Analysis Clinical nutrition (Edinburgh, Scotland) 2021 PubMed DOI
A Calcium channel blockers versus other classes of drugs for hypertension
Systematic Review The Cochrane database of systematic reviews 2021 PubMed DOI
View all evidence for Electrolytes →
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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.