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NOW Supplements NOW Supplements Coral Calcium Plus
SCIENTIFIC SCORE
Likely Ineffective
Based on 27 Researches
4.9
USERS' SCORE
Good
Based on 8 Reviews
8.5
Supplement Facts
Serving Size: 2 Veg Capsules
Amount Per Serving
%DV
Vitamin D (as Ergocalciferol)
10 mcg (400 IU)
50%
Calcium (from Fossilized Coral Calcium)
500 mg
38%
Magnesium (from Magnesium Oxide, Citrate and Aspartate)
250 mg
60%
Fossilized Coral Calcium
1.43 g (1,430 mg)

Top Medical Research Studies

9
Magnesium oxide treats leg cramps
A randomized, double-blind, placebo-controlled, multicenter study assessing the efficacy of magnesium oxide monohydrate in the treatment of nocturnal leg cramps.
High relevance for magnesium use
We conducted a study to evaluate how effective magnesium oxide monohydrate (MOMH) is in treating nocturnal leg cramps (NLC). This was a randomized, double-blind, placebo-controlled trial involving multiple centers in Ukraine, where participants took either MOMH or a placebo nightly for 60 days.

Our focus was on measuring the frequency and duration of cramps, the pain they caused, and how they affected sleep quality and overall life satisfaction. We used thorough statistical methods to compare the results between the two groups.

The findings indicated that MOMH is both effective and safe for individuals dealing with NLC. Participants reported improvements in their symptoms, demonstrating that this magnesium supplement can play a helpful role in managing nocturnal leg cramps.
Read More
9
Magnesium reduces pregnancy leg cramps
Oral magnesium for relief in pregnancy-induced leg cramps: a randomised controlled trial.
Highly relevant to leg cramps
We sought to understand the effectiveness of oral magnesium in treating leg cramps experienced by pregnant women. Our study was well-structured, involving a double-blind, randomized, placebo-controlled design. It included 86 healthy pregnant women between 14 to 34 weeks of gestation who encountered leg cramps at least twice a week, and we followed them over a four-week period.

At the end of the study, we discovered that the women taking magnesium bisglycinate chelate (300 mg per day) reported a significant reduction in cramp frequency—86% experienced at least a 50% drop compared to only 60.5% of those taking the placebo. Additionally, those on magnesium also noted a notable decrease in cramp intensity, with 69.8% achieving a similar improvement versus just 48.8% in the placebo group.

Encouragingly, we found no major side effects reported in either group, such as nausea or diarrhea. Our findings suggest that magnesium supplements can effectively reduce both the frequency and severity of leg cramps during pregnancy, offering a potential treatment option for women dealing with this common issue.
Read More
7
Magnesium's potential against cramps
Randomised, cross-over, placebo controlled trial of magnesium citrate in the treatment of chronic persistent leg cramps.
Directly investigates magnesium's impact
We set out to investigate whether magnesium citrate could be an effective remedy for those who experience bothersome leg cramps, particularly at night. In our study, we used a randomised, double-blind, cross-over, placebo-controlled design to ensure reliable results. Participants suffering from regular leg cramps were recruited and given either magnesium citrate or a matching placebo over six weeks.

Our findings revealed that those who began the trial with the placebo experienced an average reduction in cramps when taking magnesium, with a median of 5 cramps compared to 9 on the placebo. Moreover, a notable percentage of participants felt that the magnesium treatment had indeed helped them, with 78% reporting benefits, as opposed to 54% who felt the placebo was effective.

While these results suggest that magnesium may have a positive impact, it’s essential to mention that the impact on cramp severity and duration wasn’t significantly different between the two groups. Additionally, some participants did report experiencing diarrhoea as a side effect of magnesium. Overall, we believe magnesium shows promise in alleviating nocturnal leg cramps and recommend further research to fully evaluate its effectiveness.
Read More

Most Useful Reviews

10
Cramps eliminated
Since I started taking this Coral Calcium product alongside Lipitor, I have stopped experiencing leg and foot cramps caused by the medication. Whenever I have missed a dose, the cramps returned, confirming its effectiveness.
Read More
10
Cramps relief
These are excellent quality and easy to digest. They have ceased my nightly leg cramps.
Read More
9.5
Relieved leg pain
This calcium really helped my dad with his arthritis; his legs no longer hurt. I am very grateful for this product.
Read More

Medical Researches

SCIENTIFIC SCORE
Likely Ineffective
Based on 27 Researches
4.9
  • 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
9.5
Magnesium's potential in cramps
Atypical presentation of acute neurotoxicity secondary to oxaliplatin.
Moderate relevance to magnesium effects
We explored the effects of magnesium treatment in a unique case involving a 62-year-old woman with stage IV colon cancer undergoing oxaliplatin therapy. Shortly after her first infusion, we observed that she experienced significant neurological symptoms, including right hemibody paresthesia, muscle cramping in her right calf, and dysphonia.

To address these symptoms, she was administered intravenous magnesium sulfate along with calcium gluconate. Remarkably, within three hours, all her symptoms resolved. While this case suggests that magnesium can provide relief from cramps and other neurological side effects, it is important to note that magnesium was used in conjunction with other medications, making it challenging to assess its isolated effectiveness.

For future doses, the oxaliplatin was adjusted by reducing the dose and extending the infusion duration, which minimized her symptoms to occasional mild paresthesia. In summary, while magnesium showed promise in this case, further research is needed to determine its specific impact on leg cramps in a clearer, more controlled manner.
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
9
Magnesium oxide treats leg cramps
A randomized, double-blind, placebo-controlled, multicenter study assessing the efficacy of magnesium oxide monohydrate in the treatment of nocturnal leg cramps.
High relevance for magnesium use
We conducted a study to evaluate how effective magnesium oxide monohydrate (MOMH) is in treating nocturnal leg cramps (NLC). This was a randomized, double-blind, placebo-controlled trial involving multiple centers in Ukraine, where participants took either MOMH or a placebo nightly for 60 days.

Our focus was on measuring the frequency and duration of cramps, the pain they caused, and how they affected sleep quality and overall life satisfaction. We used thorough statistical methods to compare the results between the two groups.

The findings indicated that MOMH is both effective and safe for individuals dealing with NLC. Participants reported improvements in their symptoms, demonstrating that this magnesium supplement can play a helpful role in managing nocturnal leg cramps.
Read More
9
Magnesium reduces pregnancy leg cramps
Oral magnesium for relief in pregnancy-induced leg cramps: a randomised controlled trial.
Highly relevant to leg cramps
We sought to understand the effectiveness of oral magnesium in treating leg cramps experienced by pregnant women. Our study was well-structured, involving a double-blind, randomized, placebo-controlled design. It included 86 healthy pregnant women between 14 to 34 weeks of gestation who encountered leg cramps at least twice a week, and we followed them over a four-week period.

At the end of the study, we discovered that the women taking magnesium bisglycinate chelate (300 mg per day) reported a significant reduction in cramp frequency—86% experienced at least a 50% drop compared to only 60.5% of those taking the placebo. Additionally, those on magnesium also noted a notable decrease in cramp intensity, with 69.8% achieving a similar improvement versus just 48.8% in the placebo group.

Encouragingly, we found no major side effects reported in either group, such as nausea or diarrhea. Our findings suggest that magnesium supplements can effectively reduce both the frequency and severity of leg cramps during pregnancy, offering a potential treatment option for women dealing with this common issue.
Read More

User Reviews

USERS' SCORE
Good
Based on 8 Reviews
8.5
  • All Reviews
  • Positive Reviews
  • Negative Reviews
10
Cramps eliminated
Since I started taking this Coral Calcium product alongside Lipitor, I have stopped experiencing leg and foot cramps caused by the medication. Whenever I have missed a dose, the cramps returned, confirming its effectiveness.
10
Cramps relief
These are excellent quality and easy to digest. They have ceased my nightly leg cramps.
9.5
Relieved leg pain
This calcium really helped my dad with his arthritis; his legs no longer hurt. I am very grateful for this product.
8.8
Reduced leg pain
I took this calcium after hearing that coral calcium is absorbed by the body. I noticed a decrease in leg pain, making me feel much better. Although I did experience some constipation, this coral calcium did not cause any issues in that regard.
7.5
Prevented cramps
This is the second bottle I've purchased. It provides calcium and magnesium, which is great for improving sleep and curbing cramps.
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