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Calcium 1000 mg
21st Century
4.7
★ ★ ★ ★ ★
(9892 ratings)
Calcium 1000 mg
Score 60.0
A budget-friendly calcium carbonate and Vitamin D3 supplement, offering a high dose but potentially suboptimal absorption in a single serving and lacking Vitamin K2.
Quantity: 90 Tablet(s)Servings size: 1 Tablet(s) (90 servings)
Selected goals:
Other goals:
Joint Health
Bone Health
Heart Health
Muscle Gain
Fitness
leaderboard Score 60.0
A budget-friendly calcium carbonate and Vitamin D3 supplement, offering a high dose but potentially suboptimal absorption in a single serving and lacking Vitamin K2.
21st Century's Calcium 1000 mg combines a high dose of calcium carbonate with 20mcg (800 IU) of Vitamin D3, which is essential for facilitating calcium absorption in the small intestine. While 1000mg elemental calcium is a significant amount, absorption efficiency for calcium carbonate generally decreases with doses exceeding 500-600mg, suggesting that this single dose may not be fully utilized. Despite this, its exceptionally low price point ($0.06 per serving) makes it an attractive budget option. However, it does not include Vitamin K2, a crucial nutrient for directing calcium to bones and preventing its accumulation in arteries.
- Excellent price per serving, making it highly affordable.
- Includes essential Vitamin D3 for calcium absorption.
- High elemental calcium content per serving.
- 1000mg of calcium carbonate in one serving may lead to suboptimal absorption and potential digestive upset.
- Does not contain Vitamin K2, which is important for preventing arterial calcification and bone health.
- Calcium carbonate requires stomach acid for optimal absorption, ideally taken with food.
- For better absorption, consider splitting the dose or taking it with food.
- Lack of Vitamin K2 means calcium may not be optimally directed to bones, potentially increasing soft tissue calcification risk over time.
$6.21($0.06 per serving)
 Amazon | $ 6.21 | |
 Walmart | $ 7.46 | |
 iHerb | $ 6.49 |
| Ingredient | Amount per serving |
|---|---|
| Vitamin D3 (Cholecalciferol) | 20 mcg |
| Calcium (Calcium Carbonate) | 1000 mg |
Categories
Calcium 65.0
A highly cost-effective choice for calcium supplementation, providing a high dose of calcium carbonate with Vitamin D3, making it a practical option for many despite potential absorption limitations of the single large dose.
Goals
Bone Health 65.0
Offers a substantial dose of calcium with essential Vitamin D3, directly supporting bone density; however, the large single serving of calcium carbonate might not be fully absorbed, potentially limiting its overall impact on bone mineralization.
Joint Health 60.0
Provides foundational calcium and Vitamin D3 support for maintaining skeletal structure, which contributes to overall joint function, helping to keep joints healthy and mobile.
Fitness 60.0
Delivers calcium for muscle and nerve function, crucial for physical activity, complemented by Vitamin D3 for broader physiological support, enhancing overall fitness performance.
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