5/26/2025
Last update
5/26/2025
Reviewed By
Overview
SCIENTIFIC SCORE
Possibly Effective
Based on 16 Researches
7.5
USERS' SCORE
Good
Based on 13 Reviews
8.2
Supplement Facts
Serving Size: 3 Capsules
Amount Per Serving
%DV
Vitamin B6 (as pyridoxine hydrochloride)
10 mg
588%
Magnesium (as magnesium aspartate, magnesium oxide)
435 mg
104%
Zinc (as zinc aspartate, zinc monomethionine, zinc oxide)
28 mg
255%
Top Medical Research Studies
9
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.
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
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.
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
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.
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.
Read More
Most Useful Reviews
9
Wonderful sleep aid
4 people found this helpful
I’m not a gym enthusiast but gave ZMA a try for its sleep aid properties. I occasionally suffer from insomnia, and it has worked wonders for me. An hour after taking it, I feel calm and then I’m quickly off to sleep. While I can’t verify its claims about testosterone, it’s indisputably a great sleep aid!
Read More
7.5
Induces deep sleep
4 people found this helpful
After battling insomnia, I began taking ZMA daily and found it effective within days. I now fall asleep quicker and enjoy deep sleep. While I feel muscle recovery is faster, I attribute this mostly to the quality of sleep. I’ve also started recalling vivid dreams, which adds to the experience.
Read More
9
Stronger sleep
This helps my husband with his insomnia. He takes three capsules at night, and his sleep has become stronger and deeper. We are delighted!
Read More
Medical Researches
SCIENTIFIC SCORE
Possibly Effective
Based on 16 Researches
7.5
- All Researches
9
We set out to investigate how vitamin B6 contributes to improving sleep quality in individuals experiencing mild to moderate insomnia. Our study involved 40 participants who were given a combination treatment containing melatonin, vitamin B6, and extracts from various medicinal plants.
Over a period of two weeks, participants documented their sleep experiences using a daily electronic diary. We analyzed changes in sleep quality, total sleep duration, and how well our treatment reduced sleep-related daytime impairments. Encouragingly, participants reported a significant improvement in sleep quality, with an average score rise from 5.4 to 7.3 on a 10-point scale.
Although it is difficult to isolate the specific effects of vitamin B6 alone due to its use alongside other ingredients, our findings do suggest that this vitamin, when combined with melatonin and plant extracts, could support better sleep. Importantly, the treatment was well-tolerated, with no serious side effects reported.
Overall, while vitamin B6 on its own wasn’t examined, its inclusion in a combination treatment appears to play a role in enhancing sleep quality for those struggling with insomnia.
Over a period of two weeks, participants documented their sleep experiences using a daily electronic diary. We analyzed changes in sleep quality, total sleep duration, and how well our treatment reduced sleep-related daytime impairments. Encouragingly, participants reported a significant improvement in sleep quality, with an average score rise from 5.4 to 7.3 on a 10-point scale.
Although it is difficult to isolate the specific effects of vitamin B6 alone due to its use alongside other ingredients, our findings do suggest that this vitamin, when combined with melatonin and plant extracts, could support better sleep. Importantly, the treatment was well-tolerated, with no serious side effects reported.
Overall, while vitamin B6 on its own wasn’t examined, its inclusion in a combination treatment appears to play a role in enhancing sleep quality for those struggling with insomnia.
Read More
9
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.
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
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.
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
8
We investigated how a supplement containing magnesium, melatonin, and vitamin B6 impacts insomnia. The study involved 60 patients diagnosed with insomnia, who were split into a study group and a control group.
The study group received a daily dose of this supplement for three months, while both groups reported their insomnia severity using the Athens Insomnia Scale. Initially, the two groups showed similar scores, indicating mild to moderate insomnia.
After the three-month period, the results were telling. The study group reported a significant improvement, lowering their average insomnia score to mild levels, while the control group remained at moderate insomnia levels. However, it’s essential to note that while vitamin B6 was part of the supplement, we cannot conclusively state its isolated effect on insomnia treatment due to the combination with magnesium and melatonin.
Overall, the findings suggest that magnesium, melatonin, and vitamin B6 together can effectively alleviate insomnia symptoms, benefiting those struggling with sleep issues, regardless of the cause.
The study group received a daily dose of this supplement for three months, while both groups reported their insomnia severity using the Athens Insomnia Scale. Initially, the two groups showed similar scores, indicating mild to moderate insomnia.
After the three-month period, the results were telling. The study group reported a significant improvement, lowering their average insomnia score to mild levels, while the control group remained at moderate insomnia levels. However, it’s essential to note that while vitamin B6 was part of the supplement, we cannot conclusively state its isolated effect on insomnia treatment due to the combination with magnesium and melatonin.
Overall, the findings suggest that magnesium, melatonin, and vitamin B6 together can effectively alleviate insomnia symptoms, benefiting those struggling with sleep issues, regardless of the cause.
Read More
8
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.
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 13 Reviews
8.2
- All Reviews
- Positive Reviews
- Negative Reviews
9
Wonderful sleep aid
4 people found this helpful
I’m not a gym enthusiast but gave ZMA a try for its sleep aid properties. I occasionally suffer from insomnia, and it has worked wonders for me. An hour after taking it, I feel calm and then I’m quickly off to sleep. While I can’t verify its claims about testosterone, it’s indisputably a great sleep aid!
Read More
7.5
Induces deep sleep
4 people found this helpful
After battling insomnia, I began taking ZMA daily and found it effective within days. I now fall asleep quicker and enjoy deep sleep. While I feel muscle recovery is faster, I attribute this mostly to the quality of sleep. I’ve also started recalling vivid dreams, which adds to the experience.
Read More
9
Stronger sleep
This helps my husband with his insomnia. He takes three capsules at night, and his sleep has become stronger and deeper. We are delighted!
Read More
9
Effective sleep solution
I experience insomnia and have difficulty sleeping after exercising, but this resolved my issue. It’s very beneficial.
Read More
9
Greatly reduces insomnia
It is regarded as a beneficial vitamin. I feel that the best outcome has been improved sleep, thanks to the magnesium, which has significantly reduced my insomnia.
Read More
Frequently Asked Questions
7.5
Worry-free sleep
I've been taking it for two weeks. Initially, I felt no change, but now I feel good. I sleep later now, around midnight, without fretting about insomnia, which had previously caused irritability.
7.5
Boosts energy levels
3 people found this helpful
Personally, after using it for a month, I noticed an improvement in my daytime energy and my sleep quality. I previously suffered from muscle tremors, but that’s lessened. The best time to take it is before bed and it greatly benefits those with insomnia.
9
Stronger sleep
This helps my husband with his insomnia. He takes three capsules at night, and his sleep has become stronger and deeper. We are delighted!
9
Effective sleep solution
I experience insomnia and have difficulty sleeping after exercising, but this resolved my issue. It’s very beneficial.
8
Natural insomnia remedy
Compared to sleeping pills, nutrient supplements are less likely to lead to addiction. For insomnia stemming from stress and fatigue, they improve muscle tension naturally. This drug-free therapy is suitable for those sensitive to sleeping pills, like pregnant women, offering a non-drug approach to managing insomnia by providing stabilising nutrients for mood and relaxation.
9
Ideal for insomnia
Zinc and magnesium aspartate are excellent for those with insomnia. Taking this two hours before bed significantly aids sleep and is ideal for athletes.
9
Greatly reduces insomnia
It is regarded as a beneficial vitamin. I feel that the best outcome has been improved sleep, thanks to the magnesium, which has significantly reduced my insomnia.
8
We investigated how a supplement containing magnesium, melatonin, and vitamin B6 impacts insomnia. The study involved 60 patients diagnosed with insomnia, who were split into a study group and a control group.
The study group received a daily dose of this supplement for three months, while both groups reported their insomnia severity using the Athens Insomnia Scale. Initially, the two groups showed similar scores, indicating mild to moderate insomnia.
After the three-month period, the results were telling. The study group reported a significant improvement, lowering their average insomnia score to mild levels, while the control group remained at moderate insomnia levels. However, it’s essential to note that while vitamin B6 was part of the supplement, we cannot conclusively state its isolated effect on insomnia treatment due to the combination with magnesium and melatonin.
Overall, the findings suggest that magnesium, melatonin, and vitamin B6 together can effectively alleviate insomnia symptoms, benefiting those struggling with sleep issues, regardless of the cause.
The study group received a daily dose of this supplement for three months, while both groups reported their insomnia severity using the Athens Insomnia Scale. Initially, the two groups showed similar scores, indicating mild to moderate insomnia.
After the three-month period, the results were telling. The study group reported a significant improvement, lowering their average insomnia score to mild levels, while the control group remained at moderate insomnia levels. However, it’s essential to note that while vitamin B6 was part of the supplement, we cannot conclusively state its isolated effect on insomnia treatment due to the combination with magnesium and melatonin.
Overall, the findings suggest that magnesium, melatonin, and vitamin B6 together can effectively alleviate insomnia symptoms, benefiting those struggling with sleep issues, regardless of the cause.
7
We examined the potential benefits of magnesium supplements for improving sleep quality through a detailed analysis of existing clinical studies. Our systematic review focused specifically on trials investigating how magnesium affects insomnia, which have gained popularity among people seeking natural remedies for sleep problems.
A total of 15 relevant studies were reviewed. Among these, eight studies looked specifically at sleep-related outcomes, often employing the Pittsburgh Sleep Quality Index (PSQI) to measure improvements. The results were promising—five out of the eight studies indicated that magnesium supplementation led to better sleep quality.
However, it's important to note that not all studies observed benefits; two showed no significant improvements, and one provided mixed results. Many of these studies varied in the dosage, type of magnesium used, and overall participant numbers, which made it challenging to draw firm conclusions. Still, the general trend suggests that magnesium could indeed be helpful, especially for those who start with low magnesium levels.
Ultimately, while the findings lean towards positive, further large-scale, randomized trials are necessary to confirm the effectiveness of specific magnesium formulations and dosages in treating insomnia. We take these outcomes seriously, considering them a first step towards understanding how this mineral can help those struggling with sleep issues.
A total of 15 relevant studies were reviewed. Among these, eight studies looked specifically at sleep-related outcomes, often employing the Pittsburgh Sleep Quality Index (PSQI) to measure improvements. The results were promising—five out of the eight studies indicated that magnesium supplementation led to better sleep quality.
However, it's important to note that not all studies observed benefits; two showed no significant improvements, and one provided mixed results. Many of these studies varied in the dosage, type of magnesium used, and overall participant numbers, which made it challenging to draw firm conclusions. Still, the general trend suggests that magnesium could indeed be helpful, especially for those who start with low magnesium levels.
Ultimately, while the findings lean towards positive, further large-scale, randomized trials are necessary to confirm the effectiveness of specific magnesium formulations and dosages in treating insomnia. We take these outcomes seriously, considering them a first step towards understanding how this mineral can help those struggling with sleep issues.
9
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.
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.
References
- Djokic G, Vojvodić P, Korcok D, Agic A, Rankovic A, et al. The Effects of Magnesium - Melatonin - Vit B Complex Supplementation in Treatment of Insomnia. Open Access Maced J Med Sci. 2019;7:3101. 10.3889/oamjms.2019.771
- Lemoine P, Bablon JC, Da Silva C. A combination of melatonin, vitamin B6 and medicinal plants in the treatment of mild-to-moderate insomnia: A prospective pilot study. Complement Ther Med. 2019;45:104. 10.1016/j.ctim.2019.05.024
- Mydlík M, Derzsiová K. Kidney damage in acute intermittent porphyria. Przegl Lek. 2011;68:610.
- Khalid S, Bashir S, Mehboob R, Anwar T, Ali M, et al. Effects of magnesium and potassium supplementation on insomnia and sleep hormones in patients with diabetes mellitus. Front Endocrinol (Lausanne). 2024;15:1370733. 10.3389/fendo.2024.1370733
- Fathy W, Hussein M, Elanwar R, Elmoutaz H, Abdelsadek DA, et al. Effect of intra-operative Magnesium sulphate on the occurrence of post-operative delirium and insomnia in patients undergoing lumbar fixation: a randomized controlled trial. BMC Anesthesiol. 2024;24:289. 10.1186/s12871-024-02579-6
- Rawji A, Peltier MR, Mourtzanakis K, Awan S, Rana J, et al. Examining the Effects of Supplemental Magnesium on Self-Reported Anxiety and Sleep Quality: A Systematic Review. Cureus. 2024;16:e59317. 10.7759/cureus.59317
- Mah J, Pitre T. Oral magnesium supplementation for insomnia in older adults: a Systematic Review & Meta-Analysis. BMC Complement Med Ther. 2021;21:125. 10.1186/s12906-021-03297-z
- Cao Y, Zhen S, Taylor AW, Appleton S, Atlantis E, et al. Magnesium Intake and Sleep Disorder Symptoms: Findings from the Jiangsu Nutrition Study of Chinese Adults at Five-Year Follow-Up. Nutrients. 2018;10. 10.3390/nu10101354
- Scholey A, Benson S, Gibbs A, Perry N, Sarris J, et al. Exploring the Effect of Lactium™ and Zizyphus Complex on Sleep Quality: A Double-Blind, Randomized Placebo-Controlled Trial. Nutrients. 2017;9. 10.3390/nu9020154
- Abbasi B, Kimiagar M, Sadeghniiat K, Shirazi MM, Hedayati M, et al. The effect of magnesium supplementation on primary insomnia in elderly: A double-blind placebo-controlled clinical trial. J Res Med Sci. 2012;17:1161.
- Rondanelli M, Opizzi A, Monteferrario F, Antoniello N, Manni R, et al. 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. J Am Geriatr Soc. 2011;59:82. 10.1111/j.1532-5415.2010.03232.x
- Mucci M, Carraro C, Mancino P, Monti M, Papadia LS, et al. Soy isoflavones, lactobacilli, Magnolia bark extract, vitamin D3 and calcium. Controlled clinical study in menopause. Minerva Ginecol. 2006;58:323.
- Hornyak M, Haas P, Veit J, Gann H, Riemann D. Magnesium treatment of primary alcohol-dependent patients during subacute withdrawal: an open pilot study with polysomnography. Alcohol Clin Exp Res. 2004;28:1702.
- Hornyak M, Voderholzer U, Hohagen F, Berger M, Riemann D. Magnesium therapy for periodic leg movements-related insomnia and restless legs syndrome: an open pilot study. Sleep. 1998;21:501.
- Cappelli V, Morgante G, Di Sabatino A, Massaro MG, De Leo V. [Evaluation of the efficacy of a new nutraceutical product in the treatment of postmenopausal symptoms]. Minerva Ginecol. 2015;67:515.
- Cherasse Y, Saito H, Nagata N, Aritake K, Lazarus M, et al. Zinc-containing yeast extract promotes nonrapid eye movement sleep in mice. Mol Nutr Food Res. 2015;59:2087. 10.1002/mnfr.201500082
