Last update
3/29/2026
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Overview
SCIENTIFIC SCORE
Possibly Effective
Based on 1 Research
7
USERS' SCORE
Good
Based on 14 Reviews
8.5
Supplement Facts
Serving Size: 2 Tablets
Amount Per Serving
%DV
Vitamin D2 (as Ergocalciferol - a vegetarian source)
10 mcg (400 IU)
50%
Calcium (from Calcium Citrate)
600 mg
46%
Magnesium (from Magnesium Oxide and Magnesium Aspartate)
300 mg
71%
Zinc (from Zinc AAC*)
15 mg
136%
Copper (from Copper AAC*)
1 mg
111%
Manganese (from Manganese AAC*)
5 mg
217%
Top Medical Research Studies
7
Calcium citrate reduces constipation risk
We examined how calcium citrate affects constipation in patients with chronic hypoparathyroidism. In a randomized, double-blind study involving 24 participants, we found that those taking calcium citrate experienced significantly less constipation compared to those on calcium carbonate. Although both treatments maintained similar serum calcium and phosphorus levels, calcium citrate showed a favorable reduction in urinary oxalate excretion. However, there were no changes in overall quality of life scores. More extensive studies are needed to further assess these outcomes.
Read More
Most Useful Reviews
9
Doctor-recommended
12 people found this helpful
I tried a calcium carbonate supplement that caused constipation, but these do not induce that issue. This allows me to take calcium as per my doctor's recommendations, making me very happy!
Read More
9
No digestive issues
1 people found this helpful
This supplement does not cause constipation or any other digestive problems for me. Now, I simply need to wait and see if it effectively reduces my osteoporosis.
Read More
10
Cost-effective choice
Calcium citrate does not cause constipation. A bottle of 250 tablets lasts a long time, and it's a budget-friendly option.
Read More
Medical Researches
SCIENTIFIC SCORE
Possibly Effective
Based on 1 Research
7
- All Researches
7
Calcium citrate reduces constipation risk
We examined how calcium citrate affects constipation in patients with chronic hypoparathyroidism. In a randomized, double-blind study involving 24 participants, we found that those taking calcium citrate experienced significantly less constipation compared to those on calcium carbonate. Although both treatments maintained similar serum calcium and phosphorus levels, calcium citrate showed a favorable reduction in urinary oxalate excretion. However, there were no changes in overall quality of life scores. More extensive studies are needed to further assess these outcomes.
Read More
User Reviews
USERS' SCORE
Good
Based on 14 Reviews
8.5
- All Reviews
- Positive Reviews
- Negative Reviews
9
Doctor-recommended
12 people found this helpful
I tried a calcium carbonate supplement that caused constipation, but these do not induce that issue. This allows me to take calcium as per my doctor's recommendations, making me very happy!
Read More
9
No digestive issues
1 people found this helpful
This supplement does not cause constipation or any other digestive problems for me. Now, I simply need to wait and see if it effectively reduces my osteoporosis.
Read More
10
Cost-effective choice
Calcium citrate does not cause constipation. A bottle of 250 tablets lasts a long time, and it's a budget-friendly option.
Read More
9
No burden felt
This calcium citrate works very well. I experience no constipation after taking it, and it is well-absorbed without putting a burden on my stomach or intestines.
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9
Constipation relief
I have low calcium levels and decided to try this product. I've been taking two tablets daily for two months after meals, and constipation has disappeared. My nails are stronger, and my hair is less prone to breakage. This product works wonders!
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Frequently Asked Questions
9
Constipation relief
I have low calcium levels and decided to try this product. I've been taking two tablets daily for two months after meals, and constipation has disappeared. My nails are stronger, and my hair is less prone to breakage. This product works wonders!
9
No burden felt
This calcium citrate works very well. I experience no constipation after taking it, and it is well-absorbed without putting a burden on my stomach or intestines.
7.5
Safe and effective
After long-term use, I find this calcium citrate easy to absorb. I have not experienced constipation, and it's quite cost-effective. I am very thankful to iHerb for offering this product and plan to purchase it again.
9
No constipation issues
It effectively supplements calcium without causing constipation.
7.5
Improved stool quality
This form of calcium did not suit me, as it significantly weakened my stool. However, it greatly assisted my mother, who suffers from frequent constipation; her stool improved unexpectedly when she took it. Calcium is vital in old age.
7.5
Aids constipation relief
Magnesium citrate is easily absorbed and helps with constipation while improving sleep and relaxation. The only drawback is that the tablets can be challenging to swallow if the swallowing reflex is weak.
10
Cost-effective choice
Calcium citrate does not cause constipation. A bottle of 250 tablets lasts a long time, and it's a budget-friendly option.
9
No constipation observed
1 people found this helpful
Good absorption calcium citrate; it's cost-effective and suitable for the whole family. Everyone needs calcium, and calcium citrate is well-absorbed, without causing constipation or increasing the body's burden.
7
Calcium citrate reduces constipation risk
We examined how calcium citrate affects constipation in patients with chronic hypoparathyroidism. In a randomized, double-blind study involving 24 participants, we found that those taking calcium citrate experienced significantly less constipation compared to those on calcium carbonate. Although both treatments maintained similar serum calcium and phosphorus levels, calcium citrate showed a favorable reduction in urinary oxalate excretion. However, there were no changes in overall quality of life scores. More extensive studies are needed to further assess these outcomes.
References
- Naciu AM, Tabacco G, Bilezikian JP, Santonati A, Bosco D, et al. Calcium Citrate Versus Calcium Carbonate in the Management of Chronic Hypoparathyroidism: A Randomized, Double-Blind, Crossover Clinical Trial. J Bone Miner Res. 2022;37:1251. 10.1002/jbmr.4564
