Magnesium Bisglycinate
30 Servings Per Container: $0.42/Serving
The most popular form of magnesium for calm and restful sleep.
- Eases everyday stress and full-body tension*
- Calms the nervous system to support sleep onset*
- Highly bioavailable and gentle on the stomach
- Out of Stock Protection
- 10% off future deliveries
- Cancel or reschedule anytime
- Experience long-term results
The calm magnesium for restful nights and resilient days.
Chelated to glycine for better absorption and digestion, Magnesium Bisglycinate helps calm the nervous system to support falling asleep faster.
Magnesium Bisglycinate is built to do one job exceptionally well: help your nervous system power down.
Many magnesium supplements pass through the body largely unused but Momentous Magnesium Bisglycinate is chelated to the amino acid glycine, which shuttles it through dedicated absorption channels for meaningfully better uptake, without the GI discomfort common to other forms like citrate or oxide
- Promotes deep, restorative sleep by supporting GABA synthesis and calming neuromuscular excitability
- Eases everyday stress and tension — works day or night, not just at bedtime
- Non-habit forming & gentle enough for nightly use and non-laxative at the recommended dose
- 200mg of elemental magnesium helps close the gap between dietary intake and the recommended daily amount
Magnesium is a crucial mineral for over 300 bodily processes providing a foundation that makes calm, physical ease, and restorative sleep possible.
Magnesium is essential to over 300 enzymatic reactions in the body, but on its own it's unstable and poorly absorbed — it has to be bound to another compound to be usable.
In Magnesium Bisglycinate, magnesium is chelated to two molecules of glycine, an amino acid that also acts as an inhibitory neurotransmitter in the central nervous system.
That pairing does two things at once: the glycine bond lets magnesium ride along dedicated amino acid transport channels, improving absorption over inorganic forms like oxide or citrate, while glycine independently supports GABA signaling — the body's primary calming pathway.
The result is a magnesium form that's efficiently absorbed and purpose-built to support nervous system calm, sleep onset, and muscle relaxation.
- Take 2 capsules 30–60 minutes before bed for sleep support, or any time of day when you need to take the edge off stress
- Pairs well with Magtein® (magnesium L-threonate) for full-spectrum coverage — Magtein in the morning supports the brain, Bisglycinate in the evening calms the body
- Best taken consistently, every night. The calming effect builds with regular use.
Because Bisglycinate is gentle on the gut, it's one of the few magnesium forms suited to nightly, indefinite use. Take it as a steady nightly habit rather than an occasional fix.
200mg Magnesium (as Magnesium Bisglycinate)
Other Ingredients:
Hypromellose (Capsule), Silica, Magnesium Stearate, Microcrystalline Cellulose
Sourced to the same standard as every Momentous ingredient: NSF Certified for Sport®, free of unnecessary fillers and artificial colors. No added sugar, no proprietary blends — just the chelated form your body is built to use.
Some people notice improvements in muscle tension, cramps, or sleep quality within the first 1–2 weeks.* More sustained effects, including consistent sleep quality, reduced stress reactivity, and optimized mineral status, build over 4–8 weeks of daily use.*
For general magnesium repletion, stress support, muscle function, or recovery, Magnesium Bisglycinate can be taken at any time of day.
There are 6 credible reviews and studies related to this product:
"In a 155-person RCT, magnesium bisglycinate (250 mg elemental Mg/day) reduced Insomnia Severity Index scores significantly more than placebo at 4 weeks (Schuster et al., 2025, Nature and Science of Sleep)"
2. Magnesium Bisglycinate as safe form for mineral supplementation in human nutrition
"Magnesium bisglycinate is a very well tolerated and effective source for magnesium in human nutrition allowing you to take more regularly."
3. Oral magnesium for relief in pregnancy‐induced leg cramps: a randomised controlled trial
"In an 80-woman RCT, magnesium bisglycinate chelate (300 mg/day) produced a 50%-or-greater reduction in cramp frequency in 86% of the treatment group vs. 60.5% on placebo (p = 0.007), with similar improvement in cramp intensity (Supakatisant et al., 2015, Maternal & Child Nutrition)"
4. Oral magnesium supplementation for insomnia in older adults: a Systematic Review & Meta-Analysis
"A meta-analysis in older adults with insomnia found oral magnesium cut sleep-onset latency by 17.4 minutes (Mah & Pitre, 2021, BMC Complementary Medicine and Therapies)"
5. The Effects of Magnesium Supplementation on Subjective Anxiety and Stress—A Systematic Review
"A systematic review of 18 studies found suggestive benefit for subjective anxiety (Boyle et al., 2017, Nutrients)"
"NHANES data (2003–2018) show roughly half of adults below the Estimated Average Requirement from diet plus supplements combined (Omofuma et al., 2024, J Acad Nutr Diet)"
- Supports deeper, more restorative sleep
- Helps you relax and fall asleep faster
- Promotes a calmer nervous system before bed
- Helps regulate neurotransmitters like serotonin + dopamine
- Supports falling back asleep + promotes calm
- May reduce nighttime wakeups
- A synergestic blend to promote restful sleep
- Helps reset circadian rhythm during disrupted sleep cycles
- Supports nighttime recovery & reduces next-day grogginess
- Crosses the blood-brain barrier boosting magnesium levels
- Helps support learning, attention, and cognitive function
- Promotes calm brain activity and improved sleep quality
- Promotes calm, focused mental clarity
- Helps reduce acute stress without brain fog
- Supports relaxation and sleep quality
Frequently Asked Questions
Take two capsules providing 200mg of elemental magnesium (48% DV)† about 30–60 minutes before bed.
The calming effect builds with consistency, so this works best as a daily habit rather than an as-needed fix.
No, that's actually why we chose this form over magnesium oxide or citrate which are common culprits behind GI discomfort and a laxative effect at meaningful doses.
Magnesium Bisglycinate is chelated to glycine, an amino acid, so it travels through the body's amino acid transport channels instead of sitting in the gut waiting to be absorbed. That makes it well tolerated for nightly, indefinite use.
Look for three things:
- Genuine chelation — magnesium bound to glycine molecules, not a blend padded out with cheaper magnesium oxide.
- Third-party testing for purity and heavy metals; magnesium is a category where sourcing shortcuts show up in contamination testing.
- No proprietary blends or fillers — a labeled elemental magnesium amount per capsule, not just a blend weight.
Every Momentous formula is held to that standard, magnesium included.
Some people notice improvements in muscle tension, cramps, or sleep quality within the first 1–2 weeks, particularly if baseline magnesium levels were low. More sustained effects, including consistent sleep quality, reduced stress reactivity, and optimized mineral status, build over 4–8 weeks of daily use.
Yes, in most cases.
Bisglycinate pairs cleanly with the rest of a supplement stack, including Magnesium L-Threonate, since it doesn't compete for the same absorption pathway as other forms of magnesium.
Check with your doctor first if you're on diuretics, antibiotics, or bisphosphonates.
Every batch is third-party tested and NSF Certified for Sport® for purity, heavy metals, and microbial contamination before it ships — the same standard we hold across the entire Momentous line. No proprietary blends, no artificial colors, no unnecessary fillers — just the form of magnesium your body is built to use, verified by an independent lab rather than our own claims alone.
