---
product_id: 13471658
title: "Calcium 500mg + Vitamin D3 Tablets, Bone Health, 400 Count | Calcium 500 mg with Vitamin D3 for Bone Health Support, Compare VS. Os-Cal® Calcium +D3, Gluten Free, 400 Tablets"
brand: "21st century"
price: "$41.29"
currency: USD
in_stock: true
reviews_count: 9
category: "21st Century"
url: https://www.desertcart.us/products/13471658-calcium-500mg-vitamin-d3-tablets-bone-health-400-count-calcium
store_origin: US
region: United States of America
---

# 500mg Calcium per tablet 400 tablets for long-term supply Vitamin D3 for optimal absorption Calcium 500mg + Vitamin D3 Tablets, Bone Health, 400 Count | Calcium 500 mg with Vitamin D3 for Bone Health Support, Compare VS. Os-Cal® Calcium +D3, Gluten Free, 400 Tablets

**Brand:** 21st century
**Price:** $41.29
**Availability:** ✅ In Stock

## Summary

> 💪 Fortify your foundation—because strong bones never go out of style!

## Quick Answers

- **What is this?** Calcium 500mg + Vitamin D3 Tablets, Bone Health, 400 Count | Calcium 500 mg with Vitamin D3 for Bone Health Support, Compare VS. Os-Cal® Calcium +D3, Gluten Free, 400 Tablets by 21st century
- **How much does it cost?** $41.29 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/13471658-calcium-500mg-vitamin-d3-tablets-bone-health-400-count-calcium)

## Best For

- 21st century enthusiasts

## Why This Product

- Trusted 21st century brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Seamless Daily Routine:** Easy twice-daily dosing, breakable tablets fit perfectly with your multivitamin.
- • **Clean & Trusted Formula:** Gluten-free, no artificial flavors, made in FDA-registered US facility.
- • **Power-Packed Bone Support:** 500mg calcium + vitamin D3 combo fuels stronger, denser bones daily.
- • **Smart Value, Smarter Health:** Compare vs. Os-Cal and save without compromising quality or potency.
- • **Bulk Supply for Peace of Mind:** 400 tablets ensure months of uninterrupted bone health support.

## Overview

21st Century Calcium 500mg + Vitamin D3 Tablets deliver a potent daily dose of calcium paired with vitamin D3 to enhance absorption and support bone strength and density. With 400 gluten-free, unflavored tablets made in an FDA-registered US facility, this trusted formula offers a convenient, long-lasting supply designed for adults seeking effective bone health maintenance at a smart value.

## Description

21st Century Calcium 500mg + Vitamin D3 Tablets, Bone Health, 400 Count Strong bones need calcium along with the vitamin D3 that helps your body absorb it, and 21st Century Calcium 500 + D3 delivers both in one tablet to help support bone strength and density.* Each tablet provides 500 mg of calcium from oyster shell plus vitamin D3, which is added to assist with calcium absorption.* It is an easy daily choice for men and women supporting their bone health, or anyone whose diet falls short on calcium and vitamin D. Adults take one tablet twice daily with a meal; tablets may be broken in half and can be taken with your multivitamin. Made with no added yeast or artificial flavors, and gluten free. Contains shellfish (oyster). With 400 tablets for months of coverage, made in the USA from domestic and globally sourced ingredients in an FDA-registered facility and quality-tested. *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease. **This product is not manufactured or distributed by GlaxoSmithKline, owner of the registered trademark Os-Cal.

Review: BEST CALCIUM BRAND I TRUST AND EXCELLENT QUALITY 👌 - CALCIUM 500 +D3 IT IS HELPING ME TROUGH MY MENOPAUSE, I FEEL BETTER!!! IT'S HELPING MY BONES OR EVERYTHING OVERALL. I REALLY, REALLY RECOMMEND IT!!! AND FOR THE PRICE AND THIS BRAND IS ONE OF THE BRANDS I TRUST THE MOST.
Review: Promptly delivered at a reasonable price 🙏 - Wife has Osteoporosis and doctor Rx’rd it seems to be working, along with 4000 iu of D3 time will tell😊👍

## Features

- BONE HEALTH IN A SIMPLE DAILY DOSE: 500 mg of calcium paired with vitamin D3 to help support bone strength and density, with D3 added to aid calcium absorption.*
- COMPARE VS. OS-CAL** CALCIUM +D3 AND SAVE: Compare the active ingredients to Os-Cal Calcium +D3. Get 500 mg of calcium with vitamin D3 at a smarter value.
- CALCIUM AND D3, WORKING TOGETHER: Vitamin D3 helps your body absorb and use calcium, so the two work together to help support daily bone health.*
- EASY TO WORK INTO YOUR ROUTINE: Take one tablet twice daily with meals; tablets can be broken in half and pair well with your multivitamin. Made with no added yeast or artificial flavors, and gluten free.
- 400 TABLETS, TRUSTED FOR 35+ YEARS: A long-lasting supply, made in the USA from domestic and globally sourced ingredients in an FDA-registered facility and quality-tested. **This product is not manufactured or distributed by GlaxoSmithKline, owner of the registered trademark Os-Cal.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00H3KR9WC |
| Age Range Description | Adult |
| Allergen Information | Gluten Free, Shellfish |
| Best Sellers Rank | #36,190 in Health & Household ( See Top 100 in Health & Household ) #198 in Calcium Mineral Supplements #2,270 in Sales & Deals |
| Brand | 21st Century |
| Brand Name | 21st Century |
| Concentration | 500 Mg |
| Customer Reviews | 4.7 out of 5 stars 1,817 Reviews |
| Diet Type | Gluten Free |
| Flavor | Unflavored |
| Global Trade Identification Number | 00740985275238 |
| Item Form | Tablet |
| Item Nype Name | Calcium Supplement |
| Item Weight | 1.5 pounds |
| Manufacturer | 21st Century HealthCare, Inc. |
| Manufacturer Part Number | 27523 |
| Material Type Free | Gluten Free, No Artificial Colors, No Artificial Flavors |
| Model Number | 27523 |
| Number of Items | 1 |
| Primary Supplement Type | Calcium, Vitamin D3 |
| Product Benefits | Bone Strength |
| UPC | 740985275238 |
| Unit Count | 400 Count |

## Product Details

- **Brand:** 21st Century
- **Flavor:** Unflavored
- **Item Form:** Tablet
- **Primary Supplement Type:** Calcium, Vitamin D3
- **Unit Count:** 400 Count

## Images

![Calcium 500mg + Vitamin D3 Tablets, Bone Health, 400 Count | Calcium 500 mg with Vitamin D3 for Bone Health Support, Compare VS. Os-Cal® Calcium +D3, Gluten Free, 400 Tablets - Image 1](https://m.media-amazon.com/images/I/61KMu7YDrNL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ BEST CALCIUM BRAND I TRUST AND EXCELLENT QUALITY 👌
*by O***O on April 25, 2026*

CALCIUM 500 +D3 IT IS HELPING ME TROUGH MY MENOPAUSE, I FEEL BETTER!!! IT'S HELPING MY BONES OR EVERYTHING OVERALL. I REALLY, REALLY RECOMMEND IT!!! AND FOR THE PRICE AND THIS BRAND IS ONE OF THE BRANDS I TRUST THE MOST.

### ⭐⭐⭐⭐⭐ Promptly delivered at a reasonable price 🙏
*by E***N on May 11, 2026*

Wife has Osteoporosis and doctor Rx’rd it seems to be working, along with 4000 iu of D3 time will tell😊👍

### ⭐⭐⭐⭐⭐ Easy to swallow
*by G***1 on August 20, 2026*

I've taken calcium plus vitamin D for 30 plus years because I've been on cortisone for an autoimmune disease. These are easy to swallow and there's no taste and those two things are really important to me.

## Frequently Bought Together

- 21st Century Calcium 500 mg Plus D3 Tablets, 400 Count
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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-08-25*