Third-party tested
Pharmaceutical-grade
No fillers
Third-party tested
Pharmaceutical-grade
No fillers
You're tired. You're wired. Your bloodwork says you're fine.
★★★★★
48% of Americans are magnesium deficient — and their blood test won't show it.
Just $0.64 a day to feel like yourself again.
- 90-day guarantee
- Free shipping
- Third-party tested
- Cancel anytime
Wake Up at 3am
7-8 hours but still exhausted. You fall asleep fine then stare at the ceiling at 3am. Something keeps pulling you out.
Can't Shut Off
Racing thoughts. Heightened stress. Anxious for no reason.
Muscle Cramps & Twitches
Night cramps that wake you up. An eye twitch that won't quit. Restless legs.
Dragging All Day
Tired from the moment you wake up. Brain fog by noon. A second coffee doesn't touch it.
If two or more of these sound familiar — and your bloodwork says you're
fine — it's worth ruling out a deficiency your standard blood test won't show.
Where Your Magnesium Actually Lives
Your body keeps blood magnesium stable at all costs.
This means you can have severe intracellular magnesium deficiency while your blood test looks perfectly normal.
Your blood test can say you're fine. Your cells can be running on empty. Both things are true at the same time
Less than 1% of your body's magnesium circulates in your blood — which is all your doctor tests. The other 99% lives in your muscles, bones, heart, and brain, powering over 300 essential functions. That's what goes depleted. That's what never gets checked.
Not all magnesium is created equal.
Most magnesium supplements use oxide.
Your body absorbs 4–11% of it. The rest goes straight through — often with an uncomfortable reminder on the way out.
Glycinate absorbs at 18–24%.
That's not a marginal improvement. That's up to six times more magnesium actually reaching your cells.
Glycinate also contains glycine.
Glycine is an amino acid with its own calming effect on the nervous system. Oxide doesn't have it. Most magnesium brands don't mention it exists.
Introducing SageMD Calm
75mg elemental magnesium from fully-reacted bisglycinate
The optimal daily dose to fill gaps without overdoing it. Fully chelated, not just blended with cheap oxide.
2-5x better absorption than oxide
Most supplements use magnesium oxide (4-11% absorption). Glycinate delivers 18-24% — so more actually reaches your cells.
No laxative effect
Unabsorbed magnesium causes digestive issues. Better absorption means it goes where it's needed, not straight through you.
Glycine adds calming benefits for sleep
Glycine isn't just a carrier — it's an inhibitory neurotransmitter that helps lower core body temperature and quiet the mind before bed.
What many customers report*
Individual results vary.
First 1-2 Weeks
First 1-2 Weeks
Sleep improves first. Glycine helps quiet racing thoughts so you fall asleep faster, stay asleep longer, and wake up actually rested.
Weeks 2-4
Weeks 2-4
Cramps fade, energy steadies. Those muscle twitches and night cramps ease up as your cellular magnesium levels start to rebuild.
Month 2+Your New Normal
Month 2+Your New Normal
Consistent sleep, steadier energy, faster recovery — track the difference in your labs.*
Why most supplements don't work
Magnesium oxide is poorly absorbed.
Studies show that magnesium oxide has an absorption rate of only 4-11%.⁴⁶ That means if you take a 500mg magnesium oxide supplement, your body absorbs somewhere between 20-55mg of actual magnesium.
Why is absorption so poor?
Magnesium oxide has very low solubility in water and digestive fluids.⁴⁷ Most of it passes through your digestive tract unabsorbed—which is why magnesium oxide is commonly used as a magnesium supplement for constipation (acting as a laxative).
The low bioavailability means:
- You're wasting money on supplements your body can't use
- You may experience digestive discomfort (bloating, diarrhea)
- Your cellular magnesium status doesn't improve
- You continue experiencing deficiency symptoms
Note: Other forms like magnesium sulfate (mag sulfate or MgSO4) are primarily used medically via IV or as Epsom salts, not as oral supplements for daily magnesium intake.
You've probably heard about magnesium threonate.
Huberman talks about it. Momentous sells it. It's positioned as the "smart" magnesium — the one that crosses the blood-brain barrier and supercharges cognition. And that's not entirely wrong. Threonate does show promise for brain-specific magnesium levels in some studies.
But here's what that conversation leaves out.
Threonate was developed primarily for cognitive research. The sleep and stress benefits most people are actually looking for — the ones that show up in your day, in your body, in how you feel when you wake up — those come from cellular magnesium replenishment and glycine's calming effect on the nervous system. Threonate doesn't contain glycine. Glycinate does.
There's also a practical reality. Threonate supplements typically require 3–4 capsules per day to hit the studied doses, and they cost significantly more per serving. Glycinate delivers meaningful magnesium replenishment at a dose your body can actually absorb, at a price that makes a 90-day commitment realistic.
If your goal is to feel less wired at night, sleep through without waking at 3am, and stop dragging through your afternoons — glycinate is the more complete answer for that specific problem.
Threonate is interesting science. Glycinate is the thing that actually works for what you're trying to fix.
What People Are Asking
Can I take too much magnesium?
It's hard to do with Calm. The NIH sets the safe upper limit for supplemental magnesium at 350mg per day for adults. Each Calm capsule delivers 75mg of elemental magnesium — so even at the maximum of 4 capsules a day, you're at 300mg, still under that ceiling. That's by design: you can start with one capsule and adjust up as your body needs, without ever crossing into megadose territory. (Magnesium from food doesn't count toward the limit, so there's no need to factor in your diet.) If you ever take too much magnesium from any supplement, your body tells you quickly — loose stools are the classic sign. Glycinate is the gentlest form on digestion to begin with, but if that happens, simply take fewer capsules.
How long until I notice benefits?
Sleep improvements are often noticed within 1-2 weeks. Muscle cramps and stress reduction typically improve within 2-4 weeks. Metabolic benefits (blood pressure, blood sugar) may take 6-12 weeks of consistent use.
Will this make me sleepy during the day?
No. Magnesium doesn't cause drowsiness it supports your natural sleep-wake cycle. If taken during the day, it promotes relaxation and stress resilience without sedation.
Can I take this with my medications?
Magnesium can interact with certain medications (antibiotics, bisphosphonates, some blood pressure medications). Take magnesium at least 2-4 hours apart from these medications. Consult your physician if you're on prescription medications.
What about magnesium citrate or other forms?
Magnesium citrate has good absorption (similar to glycinate) but often causes loose stools at therapeutic doses. Glycinate is better tolerated. Other forms (malate, taurate, threonate—sometimes called magnesium 7 when combined with multiple forms) have specific uses, but glycinate is the best all-around choice for sleep, stress, and general deficiency.
Is this safe for pregnant or breastfeeding women?
Magnesium needs actually increase during pregnancy.⁷⁸ However, always consult your OB/GYN before starting any magnesium supplement pregnancy or while breastfeeding.
Can magnesium help with eye twitching?
Eye twitches are commonly associated with low magnesium. Adequate
magnesium intake supports normal neuromuscular function — including the
small muscles around the eyes.* This is not an eye health supplement in the traditional sense, but adequate magnesium supports neuromuscular function including around the eyes.
Support Your Body's Calming Mineral
Support restful sleep and healthy sleep patterns*
Promote muscle relaxation and reduce tension*
Support normal nervous system function*
* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Individual results may vary.