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Calcium 500+D3
21st Century
4.8
★ ★ ★ ★ ★
(5027 ratings)
Calcium 500 mg
Score 75.0
An affordable calcium carbonate (oyster shell) supplement with Vitamin D3, offering great value for basic bone health.
Quantity: 90 Tablet(s)Servings size: 1 Tablet(s) (90 servings)
Selected goals:
Other goals:
Bone Health
Heart Health
Joint Health
Muscle Gain
Fitness
leaderboard Score 75.0
An affordable calcium carbonate (oyster shell) supplement with Vitamin D3, offering great value for basic bone health.
Quantity: 400Quantity: 400Quantity: 90
21st Century's Calcium 500+D3 is a highly popular and affordable supplement that combines calcium, primarily from oyster shell (a form of calcium carbonate), with essential Vitamin D3. The inclusion of D3 is paramount as it significantly enhances calcium absorption in the gut and its proper utilization for bone mineralization, directly addressing a common deficiency in many calcium-only supplements. While oyster shell calcium is a carbonate form and may require stomach acid for absorption, its very low price per serving and high volume of positive reviews make it an excellent entry-level option for general bone, joint, and heart health support, offering significant value to consumers.
- Includes Vitamin D3, which is crucial for calcium absorption and bone health.
- Extremely low price per serving, offering exceptional affordability.
- Very high number of positive reviews, indicating widespread consumer satisfaction.
- Oyster shell calcium is primarily calcium carbonate, which can be less bioavailable for some and potentially associated with heavy metals (though usually purified by reputable brands).
- Ingredient list provided does not explicitly list D3, despite the product name.
$4.94($0.05 per serving)
 iHerb | $ 4.94 |
| Ingredient | Amount per serving |
|---|---|
| Vitamin D3 (Cholecalciferol) | 5 mcg |
| Calcium (Oyster) | 500 mg |
Categories
Calcium 75.0
This product sets a high bar for value in the calcium category by offering both calcium and Vitamin D3 at an incredibly low price, directly addressing the primary needs for effective calcium supplementation.
Goals
Bone Health 80.0
The inclusion of Vitamin D3 is a significant advantage, directly supporting calcium absorption and bone mineralization, making it effective for bone health despite the calcium carbonate form. Its affordability ensures consistent intake, further benefiting long-term bone density.
Joint Health 75.0
By improving calcium absorption through the presence of Vitamin D3, this supplement supports stronger bones, which in turn provide better structural support for joints. This makes it a more effective choice for joint health than calcium-only products.
Heart Health 70.0
Calcium is vital for cardiovascular function, and with improved absorption from D3, it supports healthy heart muscle and nerve signaling. Its cost-effectiveness can encourage consistent use, benefiting overall heart health.
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