The rise of wellness influencers has intensified interest in magnesium-rich products, including trendy drinks like the “sleepy girl mocktail” and various flavored drink mixes. These influencers are fueling a historical enthusiasm surrounding the mineral’s sleep-enhancing properties.
But the question remains: do these supplements actually deliver results?
“Magnesium is a vital mineral that plays a role in over 300 bodily processes,” explains Samantha Cassetty, a registered dietitian based in New York City. “It’s essential to obtain it through our diet or supplements if dietary sources aren’t sufficient.”
Magnesium aids in sleep by facilitating the production of melatonin, the sleep hormone, in addition to regulating blood sugar and blood pressure, enhancing energy production, and supporting digestion, muscle, bone, and brain health.
The recommended daily intake for adults is between 310 to 420 milligrams, which can be obtained through a diet rich in magnesium. Excellent dietary sources include dark leafy greens, beans, nuts, seeds, whole grains like quinoa and shredded wheat, and various fruits.
If you’re contemplating magnesium supplementation, it’s important to note that these supplements are typically derived from natural sources, such as seawater or mined minerals, according to John Travis, a principal technical manager at NSF, formerly the National Sanitation Foundation.
While magnesium is essential for health, the academic evidence supporting the idea that magnesium supplements enhance sleep quality is limited, as noted by Dr. Anita Shelgikar, director of the sleep medicine fellowship and clinical professor of neurology at the University of Michigan.
Choosing the appropriate magnesium supplement and adhering to recommended doses is crucial to prevent undesirable side effects.
Various forms of magnesium supplements exist, named for the different chemical compounds formed when the mineral is combined with other substances that affect absorption and tolerance, as explained by Travis and Shelgikar.
Common varieties include magnesium glycinate, magnesium citrate, magnesium malate, magnesium oxide, and magnesium L-threonate.
Magnesium glycinate is frequently recommended for sleep, as glycine, an amino acid, plays a role in sleep processes and is gentle on the stomach, according to Cassetty.
Magnesium citrate can have surprising effects, often resulting in digestive urgency rather than relaxation. It draws water into the colon, potentially causing laxative effects, stomach cramps, or gas. For this reason, it’s sometimes employed before medical procedures like colonoscopies and abdominal surgeries, as noted by Cassetty and Shelgikar.
Both magnesium citrate and magnesium glycinate are absorbed more effectively than magnesium oxide, according to Cassetty. However, magnesium oxide can still function as a laxative and is sometimes utilized to treat magnesium deficiency due to its potency, as explained by Shelgikar.
Magnesium malate has received less scrutiny, according to Cassetty, but is less likely to induce digestive discomfort and is marketed as beneficial for boosting energy and alleviating pain. “Some users report improvements online, and certain small studies suggest its efficacy,” she noted. “However, conclusions remain tentative.”
Nonetheless, if pain contributes to sleep disturbances and magnesium malate helps alleviate that pain, it could subsequently improve sleep quality, Cassetty suggests.
Magnesium L-threonate, known commercially as Magtein, was developed by scientists at the Massachusetts Institute of Technology to cross the blood-brain barrier. This process allows it to enhance magnesium levels in the brain, making it more beneficial throughout the body compared to other forms of the mineral that are less absorbable.
Magnesium L-threonate is primarily intended to support learning, memory, and overall cognitive function—benefits documented in clinical research funded by its manufacturers. There are also suggestions that it might aid sleep quality and reduce stress, though not as effectively as other magnesium forms.
Each form of magnesium supplement is available individually or combined with others as magnesium compound products.
Yet, only a limited number of academic studies directly assess whether magnesium supplements enhance sleep quality, according to Shelgikar.
One small study involving 134 adults, published in 2025, revealed that participants taking 250 milligrams of magnesium biglycinate daily exhibited significantly improved sleep as evidenced by reductions in their Insomnia Severity Index scores compared to a placebo group over a period of four weeks.
These findings were consistent with a 2021 review analyzing three studies involving 151 older adults with insomnia. In that review, participants who consumed between 320 to 729 milligrams of magnesium citrate or magnesium oxide for three to eight weeks fell asleep approximately 17 minutes faster and enjoyed about 16 minutes more sleep than the placebo group. However, researchers cautioned that some results were weak, and the quality of the trials was subpar, leading to soft recommendations.
Similar outcomes have been identified in older adults taking magnesium biglycinate for their insomnia symptoms, according to Dr. Tod Cooperman, president of ConsumerLab.com, an independent evaluation service for health and nutrition products.
In a 2021 study involving nearly 4,000 young adults, those with the highest magnesium intake—around 196 milligrams per 1,000 calories daily—were 23% more likely to report better sleep quality compared to those consuming roughly 105 milligrams daily. The high-consumption group was also less likely to sleep fewer than seven hours per night.
However, some results synthesized magnesium intake from both dietary and supplemental sources. The significance of the findings diminished when accounting for participants’ diverse health factors, including smoking habits, alcohol intake, and physical activity levels.
Although direct evidence linking magnesium to improved sleep is scarce, taking supplements has shown a beneficial impact on various elements that contribute to sleep health—such as cortisol levels, muscle relaxation, and receptors regulating nervous system function.
If you’re lacking magnesium in your diet—an issue many face—it’s feasible that this deficiency could lead to sleep disruptions, according to Cassetty. For many individuals, attempting magnesium supplements is generally safe; hence it is often easy to recommend, even with the research yet to be compelling.
Regardless, it’s essential to consult your physician before starting any supplement to prevent potential adverse interactions with existing medical conditions or medications, says Shelgikar.
“Not everything that is natural guarantees safety,” warns Cassetty.
Individuals with kidney issues, cardiovascular diseases, gastrointestinal conditions, or low bone density should particularly exercise caution, as Shelgikar notes that impaired kidney function may result in elevated, unsafe magnesium levels.
Consuming more than 350 milligrams of magnesium supplements can lead to toxicity, manifesting in symptoms such as low blood pressure, nausea, irregular heartbeat, breathing difficulties, and even cardiac arrest.
If you encounter sleep difficulties, it’s advisable to evaluate your overall habits before seeking “magnesium or any other sleep solution as a quick fix,” Cassetty mentions. “Improving poor sleep hygiene practices is essential and may take precedence.”
If changes in sleep habits do not yield improvements after several weeks, it may be wise to consult your doctor or a sleep specialist to determine if an underlying issue exists that could be masked by supplements.
The US Food and Drug Administration regulates over-the-counter supplements as food products. Consequently, manufacturers are responsible for assessing the safety and labeling of their products for FDA compliance prior to market launch. This results in diminished standardization and quality control concerning supplement ingredients, meaning that neither the source nor dosage of an active ingredient is guaranteed.
To ensure the safety and quality of supplements, it’s advisable to seek products certified by an independent organization, such as NSF, as suggested by Travis.
“NSF-certified dietary supplements are manufactured in safe, hygienic facilities that adhere to FDA regulatory standards. Depending on the certification type, these products have undergone evaluations to ensure that the label accurately reflects the bottle’s contents,” remarks Travis.
Additionally, resources like the United States Pharmacopeial Convention and Cooperman’s ConsumerLab.com provide similar certifications, so look for “NSF,” “USP,” or “CL” labels on supplements to ensure quality.
Get inspired by a weekly roundup on living well, made simple. Sign up for CNN’s Life, But Better newsletter for information and tools designed to improve your well-being.
