Last update
4/15/2026
Reviewed By
Overview
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Moderately Good
Based on 12 Reviews
7
Supplement Facts
Serving Size: 2 Tablets
Amount Per Serving
%DV
Vitamin D3 (as Cholecalciferol)
13 mcg (500 IU)
63%
Calcium (as Calcium Citrate)
630 mg
48%
Most Useful Reviews
9
Effective calcium supplement
We take this calcium regularly. After a course of treatment, my blood calcium levels normalised, indicating that it works. The price is very reasonable! It contains vitamin D, enhancing calcium absorption, and adding K2 would create an excellent combination!
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9
Positive test results
I bought this for my child due to a calcium deficiency. Previous vitamin complexes did not improve calcium levels in the blood. After a month of using this product, the next tests showed a good result. We will continue taking it.
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9
High bioavailability noted
This calcium comes as citrate with vitamin D3. The price is attractive, and the large container lasts for a long time. In our pharmacies, calcium is often in carbonate form, which has low digestibility. Calcium citrate, however, is not reliant on gastric juice for absorption, and its bioavailability is several times higher than carbonate. Some manufacturers mix small amounts of calcium citrate with carbonate to market their products as more digestible. The price-quality ratio is excellent!
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User Reviews
USERS' SCORE
Moderately Good
Based on 12 Reviews
7
- All Reviews
- Positive Reviews
- Negative Reviews
9
Effective calcium supplement
We take this calcium regularly. After a course of treatment, my blood calcium levels normalised, indicating that it works. The price is very reasonable! It contains vitamin D, enhancing calcium absorption, and adding K2 would create an excellent combination!
Read More
9
Positive test results
I bought this for my child due to a calcium deficiency. Previous vitamin complexes did not improve calcium levels in the blood. After a month of using this product, the next tests showed a good result. We will continue taking it.
Read More
9
High bioavailability noted
This calcium comes as citrate with vitamin D3. The price is attractive, and the large container lasts for a long time. In our pharmacies, calcium is often in carbonate form, which has low digestibility. Calcium citrate, however, is not reliant on gastric juice for absorption, and its bioavailability is several times higher than carbonate. Some manufacturers mix small amounts of calcium citrate with carbonate to market their products as more digestible. The price-quality ratio is excellent!
Read More
9
Effective calcium supplement
Best calcium supplement I've had during my pregnancy; it significantly reduced my night cramps. It acts quickly without any side effects, and there are no unnecessary additives or aromatisers. I highly recommend it for replenishing calcium deficiency.
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7.5
Improved overall health
I recently started taking 21st Century’s calcium citrate and vitamin D3 supplement. The 120 tablet package is convenient and economical; one tablet lasts for months. Since using this supplement, my overall health has significantly improved. The combination of vitamin D3 with calcium maintains bone health and boosts my immune system, making me feel more energetic, especially in cold seasons. The tablets are easy to swallow, and I’ve had no digestive issues. This brand offers quality products at great value, and I highly recommend it for bone health support.
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Frequently Asked Questions
No FAQs are available for this product and symptom.
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