Calcium 500+D3
21st Century
Calcium 500+D3
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.
insights Analysis
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 |
bolt Effectiveness for goals
Yes, vitamin D is essential for the effective absorption of calcium in the intestines. Without sufficient vitamin D, the body cannot absorb calcium properly, even if calcium intake is adequate. This partnership is crucial for maximizing calcium's benefits for bone health.
Adequate calcium intake, especially when combined with sufficient vitamin D, is important for bone health and may help reduce the risk of osteoporosis. It provides the necessary minerals for bone density. However, it's one of several factors in osteoporosis prevention and management.
Calcium is a primary mineral component of bones and teeth. Adequate intake is essential for maintaining bone density throughout life and plays a crucial role in bone formation and remodeling. Consistent supply helps support strong skeletal structure.
Calcium is a crucial mineral for maintaining strong bones throughout life, acting as a primary building block for bone tissue. Adequate calcium intake helps to support and maintain bone density. It is essential for the continuous remodeling process of bones.
Calcium, especially when combined with vitamin D, is an important nutrient for maintaining bone health. Consistent intake helps support bone density, which can contribute to reducing the risk of osteoporosis. However, it is one factor among many in preventing this condition.
schedule Dosage, timing & forms
For most adults aged 19-50, the recommended daily intake of calcium is typically 1,000 mg. This recommendation may vary slightly based on age, gender, and life stage, such as during adolescence or older adulthood.
The recommended dietary allowance (RDA) for most adult men and women aged 19-50 years is 1,000 mg per day. For women over 50 and all adults over 70, the RDA increases to 1,200 mg per day. These recommendations include calcium from both food and supplements.
The two most common forms of calcium in supplements are calcium carbonate and calcium citrate. Calcium carbonate is generally more affordable and contains a higher percentage of elemental calcium, while calcium citrate is well-absorbed with or without food.
Yes, calcium supplements can interact with certain medications, including some antibiotics, thyroid hormones, and bisphosphonates. It is generally advised to take calcium supplements at a different time of day from these medications to avoid interference with absorption. Always consult a healthcare professional about potential interactions.
Calcium carbonate is the most common and inexpensive form, containing 40% elemental calcium, and is best taken with food for optimal absorption. Calcium citrate contains 21% elemental calcium, can be taken with or without food, and may be better for individuals with low stomach acid. Your specific needs may influence which form is more suitable.
health_and_safety Safety & interactions
Yes, calcium supplements can interact with several medications, potentially affecting their absorption or efficacy. These include certain antibiotics (e.g., tetracyclines, fluoroquinolones), thyroid hormones (e.g., levothyroxine), bisphosphonates, and some diuretics. It is advisable to consult a healthcare professional or pharmacist regarding potential interactions with any medications you are taking.
Yes, calcium supplements can interact with several medications, potentially affecting their absorption or efficacy. These include certain antibiotics (e.g., tetracyclines, fluoroquinolones), thyroid hormones (e.g., levothyroxine), bisphosphonates, and some blood pressure medications. It is advisable to consult a healthcare professional regarding potential interactions and timing of doses.
Common side effects of calcium supplements may include constipation, bloating, and gas. These effects are usually mild and can sometimes be alleviated by adjusting the dosage or type of calcium, or by taking the supplement with food. If side effects persist, consulting a healthcare professional is recommended.
Yes, excessive intake of calcium, especially from supplements, can lead to hypercalcemia, a condition where calcium levels in the blood are too high. Symptoms can include nausea, vomiting, confusion, and kidney problems. Adhering to the Tolerable Upper Intake Level (UL) for calcium, which varies by age, is important.
Vitamin D plays a crucial role in helping the body absorb calcium from the gut. Therefore, adequate vitamin D levels are essential for calcium to be utilized effectively by the body for bone health. Many calcium supplements include vitamin D to enhance this absorption.
Ingredients
| Ingredient | Amount per serving |
|---|---|
Vitamin D3 | 5 mcg |
Calcium | 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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