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NOW Supplements Magnesium & Calcium
SCIENTIFIC SCORE
Possibly Effective
Based on 15 Researches
7.6
USERS' SCORE
Good
Based on 6 Reviews
8.2
Supplement Facts
Serving Size: 3 Tablets
Amount Per Serving
%DV
Vitamin D-3 (as Cholecalciferol)
25 mcg (1,000 IU)
125%
Calcium (from Aquamin® TG Seaweed Derived Minerals and Calcium Citrate)
400 mg
31%
Magnesium (from Magnesium Oxide, Magnesium Glycinate, Magnesium Taurinate, Magnesium Citrate and Aquamin® TG Seaweed Derived Minerals)
800 mg
190%
Zinc (from L-OptiZinc® Monomethionine)
15 mg
136%

Top Medical Research Studies

9
Magnesium improves elderly insomnia
The effect of magnesium supplementation on primary insomnia in elderly: A double-blind placebo-controlled clinical trial.
Direct focus on magnesium's effect
We conducted a double-blind, placebo-controlled clinical trial to investigate the effects of magnesium supplementation on insomnia in elderly individuals. Our study involved 46 participants who were assigned either to receive 500 mg of magnesium daily or a placebo for a duration of 8 weeks.

Throughout the study, we employed various questionnaires, including the Insomnia Severity Index (ISI), to evaluate the participants' sleep quality both before and after the treatment period. We also monitored the intake of other nutrients and performed blood tests to assess hormone levels related to sleep.

The results showed that magnesium supplementation led to significant improvements in areas such as sleep efficiency, sleep onset timing, and overall insomnia severity. We observed increases in serum levels of melatonin and changes in cortisol and renin levels, indicating a physiological response that could enhance sleep quality.

Overall, it seems that supplementing with magnesium has the potential to improve sleep for older adults struggling with insomnia. This finding could pave the way for new, accessible treatment options for those affected by sleep disorders.
Read More
8
Zinc promotes sleep in mice
Zinc-containing yeast extract promotes nonrapid eye movement sleep in mice.
High relevance to insomnia treatment
We explored the effects of zinc on sleep by looking at how it might help with insomnia. In our study, we gave mice a zinc-containing yeast extract and monitored their behavior and brain activity. The results were quite promising.

We found that administering zinc at doses of 40 and 80 mg/kg led to a significant increase in non-rapid eye movement (NREM) sleep. This means that the mice were not only sleeping longer but also showed less activity, which is a good indicator of effective sleep. Interestingly, we did not observe any changes in rapid eye movement (REM) sleep, a crucial sleep phase for dreaming and deep rest.

Importantly, we didn’t see any negative side effects, such as rebound insomnia, within 24 hours after treating the mice. This suggests that zinc could be a safe option for those struggling with sleep issues, unlike other mineral extracts we tested, such as manganese, iron, and copper, which did not affect locomotor activity at all.

Overall, our findings provide the first evidence that zinc has a direct role in promoting sleep, opening up exciting possibilities for new sleep supplements featuring this essential mineral.
Read More
4
Magnesium shows limited sleep benefits
Oral magnesium supplementation for insomnia in older adults: a Systematic Review & Meta-Analysis.
Directly addresses magnesium's sleep effects.
We explored the effects of magnesium supplementation on insomnia in older adults through a systematic review and meta-analysis. Our investigation included several studies that compared magnesium with a placebo or no treatment.

We found three randomized control trials involving 151 older adults across three countries. The pooled results indicated that individuals taking magnesium had a notable decrease in sleep onset latency, averaging a reduction of 17.36 minutes compared to those on placebo. However, the improvement in total sleep time, which increased by 16.06 minutes in the magnesium group, did not reach statistical significance.

Despite these findings, we must emphasize that the overall quality of the research is below standards necessary for making firm recommendations. All studies reviewed showed a moderate to high risk of bias, and the evidence quality ranged from low to very low. Nonetheless, magnesium is an affordable and widely accessible option for those struggling with insomnia symptoms, suggesting it may be a reasonable consideration for some older adults.
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Most Useful Reviews

10
Product effective at night
I take this magnesium at night for insomnia, in combination with melatonin. I’ve been sleeping very well since I started!
Read More
8.3
Improved sleep quality
At the end of the prophylactic course (1 month) of "calcium + magnesium", I can highlight the positives: ✅ my bowel movements have normalised; ✅ the frequency of knee joint pain has notably decreased; ✅ calf cramps no longer trouble me. Previously, every time I lay in bed in the morning, my calf, especially on the left leg, would experience excruciating pain, alarming my family. After a month of taking these supplements, I can now stretch without discomfort; ✅ I no longer suffer from insomnia (I fall asleep as soon as my head hits the pillow), but I used to get up 1-2 times a night for a drink or the loo. Since I began the supplements, I find I hardly wake up, leading to a more restful sleep and a more energetic morning wake-up, despite my 5/2 work schedule; ✅ I have more energy throughout the day, and most importantly, my stomach no longer aches after taking them!
Read More
8.8
Satisfactory sleep aid
As someone who often experiences insomnia, I was recommended by a friend to take magnesium and calcium. The dosage is adequate, and I feel fewer morning headaches after a few weeks. Although the sleep aid effects are not yet strong, I'm content with the progress towards deep sleep.
Read More

Medical Researches

SCIENTIFIC SCORE
Possibly Effective
Based on 15 Researches
7.6
  • All Researches
9
Magnesium shows potential insomnia benefits
The Effects of Magnesium - Melatonin - Vit B Complex Supplementation in Treatment of Insomnia.
Supplement effects are combined
We explored the potential benefits of a supplement containing magnesium, melatonin, and vitamin B complex in treating insomnia. The study involved 60 patients diagnosed with insomnia, who were divided into a study group and a control group. Over three months, the study group received a daily dose of the supplement, while the control group did not receive it.

At the start, both groups had similar levels of insomnia, indicated by their scores on the Athens insomnia scale. However, after three months of supplementation, the study group showed a significant improvement, with their insomnia scores decreasing, indicating mild insomnia. In contrast, the control group’s scores remained stable, suggesting they continued to experience moderate insomnia.

Although magnesium was part of the supplement, the study design makes it challenging to isolate its specific effects on insomnia. Nevertheless, we observed that combining magnesium with melatonin and vitamin B complex potentially enhances sleep quality for those struggling with insomnia.
Read More
9
Magnesium improves elderly insomnia
The effect of magnesium supplementation on primary insomnia in elderly: A double-blind placebo-controlled clinical trial.
Direct focus on magnesium's effect
We conducted a double-blind, placebo-controlled clinical trial to investigate the effects of magnesium supplementation on insomnia in elderly individuals. Our study involved 46 participants who were assigned either to receive 500 mg of magnesium daily or a placebo for a duration of 8 weeks.

Throughout the study, we employed various questionnaires, including the Insomnia Severity Index (ISI), to evaluate the participants' sleep quality both before and after the treatment period. We also monitored the intake of other nutrients and performed blood tests to assess hormone levels related to sleep.

The results showed that magnesium supplementation led to significant improvements in areas such as sleep efficiency, sleep onset timing, and overall insomnia severity. We observed increases in serum levels of melatonin and changes in cortisol and renin levels, indicating a physiological response that could enhance sleep quality.

Overall, it seems that supplementing with magnesium has the potential to improve sleep for older adults struggling with insomnia. This finding could pave the way for new, accessible treatment options for those affected by sleep disorders.
Read More
9
Magnesium may aid sleep quality
The effect of melatonin, magnesium, and zinc on primary insomnia in long-term care facility residents in Italy: a double-blind, placebo-controlled clinical trial.
Challenges isotating magnesium's effect
We conducted a double-blind, placebo-controlled clinical trial in a long-term care facility in Italy to explore whether nightly doses of melatonin, magnesium, and zinc could benefit residents suffering from primary insomnia. Our study involved 43 participants, who were either given a combined supplement of these nutrients or a placebo for eight weeks.

The primary objective was to measure sleep quality using the Pittsburgh Sleep Quality Index, while we also considered secondary indicators like daytime sleepiness and overall quality of life. The results revealed that the combined approach of melatonin, magnesium, and zinc appeared to improve both sleep and quality of life for residents struggling with insomnia.

However, since magnesium was tested alongside two other supplements, we cannot clearly attribute the benefits directly to magnesium alone. Overall, the findings suggest a positive effect on sleep quality and well-being for long-term care residents dealing with insomnia, but we must be cautious in isolating each nutrient's individual effectiveness.
Read More
9
Zinc's role in insomnia unclear
The effect of melatonin, magnesium, and zinc on primary insomnia in long-term care facility residents in Italy: a double-blind, placebo-controlled clinical trial.
Combination therapy complicates zinc analysis
We conducted a double-blind, placebo-controlled study in a long-term care facility in Italy to assess whether nightly supplementation of melatonin, magnesium, and zinc could help improve primary insomnia in elderly residents. A total of 43 participants, mostly in their late 70s, were divided into two groups: one received a combination of these supplements, while the other received a placebo for eight weeks.

Throughout the study, we focused on measuring sleep quality using several tools, including the Pittsburgh Sleep Quality Index and the Epworth Sleepiness Scale. After two months, we found that the group taking melatonin, magnesium, and zinc showed improvements in sleep quality and overall quality of life compared to the placebo group.

While the results are promising for the combination of these supplements, it's important to note that this study makes it challenging to determine the specific role that zinc alone may play in addressing insomnia. Nonetheless, the findings suggest that this combination could be beneficial for sleep in long-term care residents experiencing primary insomnia.
Read More
8
Magnesium improves insomnia in diabetes
Effects of magnesium and potassium supplementation on insomnia and sleep hormones in patients with diabetes mellitus.
Relevant but combined effects noted
We conducted a randomized controlled trial focusing on individuals with diabetes who struggle with insomnia. Over two months, we examined the effects of magnesium and potassium supplementation on sleep quality and hormone levels. Our study included 320 patients, and after follow-up, 290 patients completed the trial. We assessed insomnia severity using the Insomnia Severity Index and analyzed changes in melatonin and cortisol levels, which are key sleep hormones.

Our findings indicated that magnesium supplementation—whether alone or in combination with potassium—had a notable positive impact. Participants who received magnesium and potassium demonstrated significant improvements in both insomnia severity and sleep hormone levels. It was exciting to see how these supplements could enhance sleep duration and quality in those facing the dual challenges of insomnia and diabetes.

Although the combination of magnesium and potassium was effective, we recognize that this limits a clear assessment of magnesium's isolated effects. Nevertheless, our research adds valuable insights on how these minerals may play a role in managing insomnia among diabetic patients.
Read More

User Reviews

USERS' SCORE
Good
Based on 6 Reviews
8.2
  • All Reviews
  • Positive Reviews
  • Negative Reviews
10
Product effective at night
I take this magnesium at night for insomnia, in combination with melatonin. I’ve been sleeping very well since I started!
8.3
Improved sleep quality
At the end of the prophylactic course (1 month) of "calcium + magnesium", I can highlight the positives: ✅ my bowel movements have normalised; ✅ the frequency of knee joint pain has notably decreased; ✅ calf cramps no longer trouble me. Previously, every time I lay in bed in the morning, my calf, especially on the left leg, would experience excruciating pain, alarming my family. After a month of taking these supplements, I can now stretch without discomfort; ✅ I no longer suffer from insomnia (I fall asleep as soon as my head hits the pillow), but I used to get up 1-2 times a night for a drink or the loo. Since I began the supplements, I find I hardly wake up, leading to a more restful sleep and a more energetic morning wake-up, despite my 5/2 work schedule; ✅ I have more energy throughout the day, and most importantly, my stomach no longer aches after taking them!
Read More
8.8
Satisfactory sleep aid
As someone who often experiences insomnia, I was recommended by a friend to take magnesium and calcium. The dosage is adequate, and I feel fewer morning headaches after a few weeks. Although the sleep aid effects are not yet strong, I'm content with the progress towards deep sleep.
Read More
7.5
Positive impacts expected
I have been using this for a while to assist with my insomnia and muscle recovery. There are indications that taking this may yield positive results!
6.8
Quality of sleep improved
This product seems to work for me. After taking it, I've noticed less nervousness around meal times and improved insomnia, although my sleep quality is still lacking.
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