'
21st Century Calcium Citrate Plus D
SCIENTIFIC SCORE
Questionable
Based on 8 Researches
5.9
USERS' SCORE
Good
Based on 34 Reviews
8.6
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%

Top Medical Research Studies

9
Calcium dobesilate reduces leg cramps
Calcium dobesilate for chronic venous insufficiency: a systematic review.
Direct application to leg cramps
We examined the benefits of calcium dobesilate for patients suffering from chronic venous insufficiency (CVI), particularly focusing on how it impacts symptoms like leg cramps. In a systematic evaluation of ten different clinical trials involving 778 patients, we compared the effects of calcium dobesilate to a placebo.

Our analysis found that calcium dobesilate significantly reduced night cramps, helping patients nearly twice as much as those who received a placebo. The number needed to treat for this relief was calculated to be 8, indicating that for every eight patients treated with calcium dobesilate, one experienced noticeable improvement.

Moreover, patients also reported less discomfort, with a number needed to treat of 4 for that symptom. Interestingly, we noted that those with more severe symptoms experienced even greater relief, suggesting that calcium dobesilate is particularly effective for patients with advanced CVI. However, both doses tested—1,000 mg and 1,500 mg—proved equally effective, which is good news as it suggests that a lower dose might suffice.

Additionally, we found that adverse events were not significantly different from the placebo group, indicating a favorable safety profile. While calcium dobesilate shows promise, we acknowledge the need for further studies to solidify these findings and explore its efficacy in various CVI stages.
Read More
8
Calcium reduces leg cramps effectively
Interventions for leg cramps in pregnancy.
Significant study support for calcium
We assessed the effectiveness of calcium in alleviating leg cramps, a common issue faced by many women in the later stages of pregnancy. Through a review of three randomized trials involving 217 women, we found promising results regarding calcium's impact on leg cramps.

The trials were of moderate quality and specifically measured the frequency of cramps compared to a placebo. Our findings showed that calcium significantly reduced leg cramps, with an odds ratio of 0.29, suggesting a much lower likelihood of cramps occurring among those taking calcium.

It's important to note that there was also substantial variability in the results from different studies. Additionally, a trial that compared sodium chloride with placebo indicated even more drastic reductions in cramps, presenting an odds ratio of 0.08.

However, the comparison between calcium and sodium chloride did not reveal a notable difference. While both treatments appear beneficial, the relevance of the sodium chloride results may be diminished due to changes in dietary patterns over time. Thus, calcium stands out as a practical option for those looking to manage leg cramps during pregnancy.
Read More
7
Calcium may reduce leg cramps
Interventions for leg cramps in pregnancy.
Evaluated calcium's effectiveness
We explored the effects of calcium supplements on leg cramps experienced during pregnancy by analyzing studies that compared calcium treatment to no treatment. The research included one trial with 43 women, evaluating how well calcium helped alleviate leg cramps.

The findings suggested that women taking calcium were more likely to experience fewer leg cramps after treatment compared to those who didn't receive any treatment. Specifically, a higher proportion of women reported having no leg cramps at all after taking calcium. However, the evidence was classified as very low quality, making it difficult to draw strong conclusions.

Overall, while calcium appeared to offer some benefit in reducing leg cramps, the lack of rigorous studies and clear outcomes means we should approach these findings with caution. Further research is needed to confirm these effects and establish a clearer understanding of how calcium works for pregnant women dealing with leg cramps.
Read More

Most Useful Reviews

9.5
Healed broken leg
After breaking my leg, I used calcium in chelate form for three months, which significantly aided my recovery. Now I’ve switched to citrate form and ordered a larger pack. It seems effective in strengthening my bones, easing my ability to walk, reducing leg cramps, and expediting my healing process.
Read More
9.5
Cramps disappeared
I tried this calcium and was pleased, so I ordered a larger package. The quality is excellent; within four days, my leg cramps ceased. My nails have become stronger too, without any signs of exfoliation.
Read More
9.5
Reduced pain
I bought calcium for my nephews who often felt leg pains. After just a week of taking two tablets, their leg cramps were alleviated.
Read More

Medical Researches

SCIENTIFIC SCORE
Questionable
Based on 8 Researches
5.9
  • All Researches
9.5
Calcium's unclear role in cramps
Atypical presentation of acute neurotoxicity secondary to oxaliplatin.
Calcium administered with magnesium
We observed an interesting case regarding the effects of calcium treatment on leg cramps related to a chemotherapy drug called oxaliplatin. In this case, a 62-year-old woman undergoing palliative treatment for stage IV colon cancer experienced acute neurotoxicity symptoms. Notably, thirty minutes after her first infusion of oxaliplatin, which she received in her left arm, she developed cramps and paresthesia in her right leg.

As part of her treatment for these symptoms, intravenous calcium gluconate was administered alongside magnesium sulfate. This combination helped alleviate her leg cramping and associated symptoms within three hours. However, while calcium was part of the treatment regimen, it is important to note that its isolated effectiveness on leg cramps is unclear due to its concurrent administration with magnesium.

Consequently, while we saw improvement in the patient's symptoms, it is difficult to attribute these results solely to calcium. Instead, it suggests that magnesium might be playing a significant role as well. Future investigations could help clarify the specific contributions of calcium in treating leg cramps related to neurotoxicity and other conditions.
Read More
9
Calcium dobesilate reduces leg cramps
Calcium dobesilate for chronic venous insufficiency: a systematic review.
Direct application to leg cramps
We examined the benefits of calcium dobesilate for patients suffering from chronic venous insufficiency (CVI), particularly focusing on how it impacts symptoms like leg cramps. In a systematic evaluation of ten different clinical trials involving 778 patients, we compared the effects of calcium dobesilate to a placebo.

Our analysis found that calcium dobesilate significantly reduced night cramps, helping patients nearly twice as much as those who received a placebo. The number needed to treat for this relief was calculated to be 8, indicating that for every eight patients treated with calcium dobesilate, one experienced noticeable improvement.

Moreover, patients also reported less discomfort, with a number needed to treat of 4 for that symptom. Interestingly, we noted that those with more severe symptoms experienced even greater relief, suggesting that calcium dobesilate is particularly effective for patients with advanced CVI. However, both doses tested—1,000 mg and 1,500 mg—proved equally effective, which is good news as it suggests that a lower dose might suffice.

Additionally, we found that adverse events were not significantly different from the placebo group, indicating a favorable safety profile. While calcium dobesilate shows promise, we acknowledge the need for further studies to solidify these findings and explore its efficacy in various CVI stages.
Read More
8
Calcium relief for leg cramps uncertain
Growth Hormone Deficiency in an Adolescent With Pseudohypoparathyroidism Type 1B.
Combined treatment complicates evaluation
We explored the impact of calcium treatment on leg cramps in an adolescent diagnosed with pseudohypoparathyroidism type 1B. The patient experienced symptoms such as muscle cramps and leg pain during activities, with laboratory tests revealing hypocalcemia and an elevated parathyroid hormone level.

While calcium treatment was part of a combined therapy that included other medications, we observed that the muscle cramps and hypocalcemia resolved after administering calcium carbonate, ergocalciferol, and calcitriol. However, due to the combination of treatments, it is challenging to determine the isolated effect of calcium on the leg cramps specifically.

Ultimately, while calcium contributed to symptom relief, our study does not provide conclusive evidence on its effectiveness alone for alleviating leg cramps. This highlights the need for further investigation into how calcium might individually influence leg cramp symptoms in such patients.
Read More
8
Calcium reduces leg cramps effectively
Interventions for leg cramps in pregnancy.
Significant study support for calcium
We assessed the effectiveness of calcium in alleviating leg cramps, a common issue faced by many women in the later stages of pregnancy. Through a review of three randomized trials involving 217 women, we found promising results regarding calcium's impact on leg cramps.

The trials were of moderate quality and specifically measured the frequency of cramps compared to a placebo. Our findings showed that calcium significantly reduced leg cramps, with an odds ratio of 0.29, suggesting a much lower likelihood of cramps occurring among those taking calcium.

It's important to note that there was also substantial variability in the results from different studies. Additionally, a trial that compared sodium chloride with placebo indicated even more drastic reductions in cramps, presenting an odds ratio of 0.08.

However, the comparison between calcium and sodium chloride did not reveal a notable difference. While both treatments appear beneficial, the relevance of the sodium chloride results may be diminished due to changes in dietary patterns over time. Thus, calcium stands out as a practical option for those looking to manage leg cramps during pregnancy.
Read More
7
Calcium may reduce leg cramps
Interventions for leg cramps in pregnancy.
Evaluated calcium's effectiveness
We explored the effects of calcium supplements on leg cramps experienced during pregnancy by analyzing studies that compared calcium treatment to no treatment. The research included one trial with 43 women, evaluating how well calcium helped alleviate leg cramps.

The findings suggested that women taking calcium were more likely to experience fewer leg cramps after treatment compared to those who didn't receive any treatment. Specifically, a higher proportion of women reported having no leg cramps at all after taking calcium. However, the evidence was classified as very low quality, making it difficult to draw strong conclusions.

Overall, while calcium appeared to offer some benefit in reducing leg cramps, the lack of rigorous studies and clear outcomes means we should approach these findings with caution. Further research is needed to confirm these effects and establish a clearer understanding of how calcium works for pregnant women dealing with leg cramps.
Read More

User Reviews

USERS' SCORE
Good
Based on 34 Reviews
8.6
  • All Reviews
  • Positive Reviews
  • Negative Reviews
9.5
Healed broken leg
After breaking my leg, I used calcium in chelate form for three months, which significantly aided my recovery. Now I’ve switched to citrate form and ordered a larger pack. It seems effective in strengthening my bones, easing my ability to walk, reducing leg cramps, and expediting my healing process.
Read More
9.5
Cramps disappeared
I tried this calcium and was pleased, so I ordered a larger package. The quality is excellent; within four days, my leg cramps ceased. My nails have become stronger too, without any signs of exfoliation.
9.5
Reduced pain
I bought calcium for my nephews who often felt leg pains. After just a week of taking two tablets, their leg cramps were alleviated.
9.5
Cramps resolved
While pregnant, I experienced frequent leg cramps. After taking calcium, the cramps subsided within a week. I'm satisfied with the results and the price.
10
Cramps stopped
My legs started cramping, but as soon as I began taking this calcium, the cramps ceased. I crush the large capsules for better absorption and continue taking them.
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