Calcium 500 + D3
21st Century
Calcium 500 + D3
4.8
★ ★ ★ ★ ★
(4030 ratings)
Calcium 500 mg
Score 75.0
An extremely affordable calcium carbonate (oyster shell) supplement with D3, offering exceptional value for general 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 extremely affordable calcium carbonate (oyster shell) supplement with D3, offering exceptional value for general bone health.
insights Analysis
21st Century's Calcium 500 + D3, similar to its counterpart, is a highly economical and popular supplement. It provides calcium sourced from oyster shell, which is a common form of calcium carbonate, and importantly, includes Vitamin D3 as indicated by its name. Vitamin D3 is crucial for maximizing calcium absorption and ensuring its proper integration into bone tissue. The product's main appeal lies in its exceptionally low price per serving, making it an excellent choice for budget-conscious consumers seeking foundational bone, joint, and heart health support. While the oyster shell source might raise minor concerns for some regarding heavy metals (though reputable brands typically purify), its widespread positive reviews affirm its reliability and value.
- Includes Vitamin D3, essential for calcium absorption.
- One of the lowest price points per serving, offering outstanding affordability.
- Very high volume of positive reviews, indicating strong consumer trust and satisfaction.
- Oyster shell calcium is calcium carbonate, which can be less bioavailable for some and might carry theoretical heavy metal concerns (though typically purified).
- D3 is not explicitly listed in the ingredients, despite being in the product name.
$5.49($0.06 per serving)
 iHerb | $ 5.49 |
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 (Cholecalciferol) | 15 mcg |
| Calcium (Oyster Shell) | 500 mg |
Categories
Calcium 75.0
This product truly excels in the calcium category by combining calcium with the vital Vitamin D3 at one of the lowest price points available, offering superior value and accessibility for effective calcium supplementation.
Goals
Bone Health 80.0
The synergistic combination of calcium and Vitamin D3 at an incredibly low price makes it highly effective for promoting bone mineralization and density, ensuring good absorption crucial for this goal.
Joint Health 75.0
By supporting robust bone structure through enhanced calcium absorption with D3, this supplement indirectly benefits joint integrity and function, providing foundational support.
Heart Health 70.0
Calcium is fundamental for heart muscle contraction and nerve impulses. With D3 aiding absorption, it can reliably contribute to these vital cardiovascular functions, especially given its affordability for consistent intake.
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