One Magnesium That Does All Ten Jobs
Glycinate-first magnesium complex with methylated B vitamins and D3 paired with K2. Two small capsules, once a day, to help your body feel like yours again.
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Description
Osa Theory Magnesium Complex is a 20-in-1 daily formula for women. An 800mg magnesium complex built from 10 forms with glycinate listed first, plus a fully methylated B-complex, vitamin D3 (5,000 IU) paired with K2 (MK-7), vitamin C, and biotin. 60 vegetarian capsules. Two capsules, once a day, with breakfast.
Why Osa Theory Magnesium?
If you're waking at 2am, running on caffeine, and tired of supplements that promise the world and deliver nothing, this was made for you.
Most magnesium bottles are one form, usually the cheapest one. But different forms of magnesium do different jobs, which is why a single-form bottle so often does nothing you can feel. This complex carries all 10 forms, leads with glycinate, the gentlest and best-absorbed, and adds the methylated B vitamins and D3 + K2 pairing you'd otherwise buy as separate bottles.
One formula. Two small capsules. Every morning.
About Your Free Gifts
Every order ships free. Buy 2 Get 2 unlocks The 2AM Reset Protocol eBook ($14.99 value), our sleep and stress handbook, delivered to your inbox on purchase. Buy 3 Get 3 adds a free 7-day pill organiser ($19.99 value), shipped in your parcel.
Benefits
Supports deeper, more restful sleep, a calm and steady stress response, daily energy without the jitters, muscle and nerve comfort, and bone health through the D3 + K2 pairing. Gentle on the stomach thanks to the glycinate-first complex.
Recommended Use
Take 2 capsules once daily with breakfast or your first meal. We recommend mornings: the methylated B vitamins support daytime energy, and steady daily magnesium levels are what support your sleep, not a sedative effect at bedtime.
Do You Offer a Guarantee?
Yes. 60 days, money back. Take it daily, and if you don't feel a difference in your sleep, stress, or energy, reply to your order email for a full refund. Keep the bottles. No forms, no questions.
Do You Remember What Rested Feels Like?
If any of these are your normal, keep reading.
Built Like No Other Magnesium.
Every form your body asks for, plus the vitamins it needs to use them, in one formula.
All Magnesiums Do Different Jobs
That's why the one-form bottle you tried didn't move the needle. Here's the form each symptom is asking for.
You need the one that carries all ten.
Forms shown as traditionally used for each concern. Individual results vary.
Four Systems, One Formula
10-Form Magnesium Complex
800mg per serving across all 10 functional forms, with glycinate, the gentlest and best-absorbed, listed first. 350mg elemental magnesium, 83% of your daily value, disclosed right on the panel.
Methylated B-Complex
B6 as P5P, folate as L-5-MTHF, B12 as methylcobalamin. Methylated means pre-activated, the form your body can actually use, even if you carry the MTHFR gene variant. Daytime energy without the jitters.
Vitamin D3 + K2, Paired
5,000 IU of D3 with 100mcg of K2 (MK-7), the way it should be taken. K2 helps direct calcium to your bones, where it belongs. The pairing most people buy as two separate bottles.
The Supporting Cast
Vitamin C and biotin round out the formula, alongside ashwagandha, myo-inositol, and raspberry ketones. Named on the label, counted in the 20, and never asked to carry the formula. The magnesium does that.
"It's the one formula that covers what I'd otherwise recommend as four separate bottles."
"Most of the women I see aren't doing anything wrong, they're just taking the wrong magnesium. A cheap single-form bottle can't do ten jobs. What I like about Osa Theory's complex is that it leads with glycinate, the gentlest, best-absorbed form, and pairs it with methylated B vitamins your body can actually use, plus D3 with K2 the way it should be taken."
Real Women. Real Nights.
I used to be awake at 3am every single night, staring at the ceiling with my brain going a million miles an hour. About two weeks in, I realised I'd slept through the night three nights in a row. I'm not groggy in the morning either, which melatonin could never manage. This one's staying.
My problem was never falling asleep, it was the constant hum of stress all evening. Snappy with my kids, shoulders up by my ears. A few weeks on this and the edge is just... off. I feel like myself in the evenings again. Two capsules with breakfast and that's it.
Every magnesium I tried before this either did nothing or had me running to the bathroom by lunch. This one is genuinely gentle, I take it with breakfast and there's zero drama. Turns out the form really does matter. Wish someone had told me years ago.
What Two Capsules Do, Every Day
From steadier mornings to quieter nights, here's what Osa Theory supports.
Real Benefits. Explained Honestly.
Twenty ingredients, one small ritual. Tap to see how each benefit works.
Sleep
The 2am wakeups, handled.
+
Sleep
Calm
The edge, off.
+
Calm
Energy
Energy without the zing.
+
Energy
Muscle & Nerve
Twitches and tension, settled.
+
Muscle & Nerve
Built For Daily Use, Not Overnight Fixes
Here's how things tend to unfold once it's part of your morning.
- Falling asleep starts to feel a little easier
- Evenings feel slightly less wired
- Digestion begins to settle
- Fewer middle-of-the-night wakeups
- Waking with less grogginess
- The 3pm crash starts to soften
- Muscle tension and twitches settle
- Steadier mood through the day
- Energy without reaching for sugar
- Sleeping through most nights
- Calm becomes the default, not the exception
- You notice the difference on the days you miss it
4 Reasons Women Switch To Osa Theory
Real formulation choices. Zero shortcuts.
Glycinate-First, Not Oxide-Filled
Most complexes bulk up on oxide, the cheapest form and the one behind most stomach horror stories. Ours lists glycinate first: the gentlest, best-absorbed form, and the one women switch to after everything else fails.
It Replaces The Whole Shelf
A magnesium, a D3, a K2, and a B-complex bought separately run well over $80 a month and a fistful of pills. This is all of them, at meaningful doses, in two capsules. Your counter gets its space back.
Methylated Bs, Paired D3 + K2
The details most brands skip. Methylated B vitamins are pre-activated so your body can actually use them, and D3 never ships without its K2 partner. The formulation choices a practitioner would check for.
Tested, Clean, Disclosed
Third-party tested and made in a cGMP facility. Elemental magnesium disclosed right on the panel: 350mg, 83% of your daily value. Vegetarian capsules, free of wheat, gluten, soy, dairy, and tree nuts. The full Supplement Facts panel is below, because you should never have to guess.
Osa Theory vs. Other Brands
Guarantee
The 60-Day Feel-It Guarantee
Take it daily for up to 60 days. If you don't feel the difference, reply to your order email for a full refund. Keep the bottles.
Try It Risk-Free Today
Stay Stocked. Stay Steady.
Consistency is the whole game with magnesium. Stock up now so week six feels even better than week three, and never pay shipping.
Add To Cart $139.96$69.99 →
They Got Their Nights Back. You Will Too.
I'm 51 and my sleep fell apart two years ago, waking up hot at 2am, then wide awake till 4. I'd tried everything cheap first, which I now know was the wrong form. My deep sleep is back, my restless legs have settled, and I genuinely notice if I miss a day.
I was taking a magnesium, a D3, a K2 and a B complex separately. Over $80 a month and I kept forgetting half of them. This is all of it in two capsules. My supplement drawer is finally just one bottle, and honestly it works better than the pile did.
I'll be honest, the first week I felt nothing and assumed I'd wasted my money again. Week two my sleep started smoothing out, week three my afternoon energy stopped crashing. It's not a knockout pill and it's not instant, but it's the first supplement where I can actually tell it's working.
Questions, Answered
Will it upset my stomach?
This is the number one reason women switch to us. The complex lists glycinate first, the gentlest form there is, and we recommend taking it with a meal. If cheap magnesium has sent you running to the bathroom before, that was almost certainly an oxide-heavy formula. This is built to be the opposite.
When should I take it?
Morning, with breakfast. The methylated B vitamins support daytime energy and the D3 belongs earlier in the day, while your sleep benefits come from steady daily magnesium levels, not from a sedative effect at bedtime. Two capsules with your first meal and you're done.
How long until I feel something?
Honestly: most women report the first shifts in one to three weeks, usually starting with sleep and evening calm. It builds with consistency rather than hitting like a pill. That's exactly why the guarantee is 60 days, long enough to know for sure, at our risk instead of yours.
How big are the capsules?
Standard vegetarian capsules, smooth-coated and easy to swallow, nothing like the horse pills some magnesium tablets are known for. Two per day with water.
I already take D3, K2, or a B-complex. Do I still need those?
This formula includes them at meaningful doses: 5,000 IU of D3 with 100mcg of K2, plus a full methylated B-complex. Most women replace their separate bottles with this one. If you take prescription medication or very high-dose vitamin D already, check your totals with your doctor first.
I have the MTHFR gene variant. Can I take this?
This formula was built with you in mind. The B vitamins are all in methylated, pre-activated forms (L-5-MTHF folate, methylcobalamin B12, P5P B6), the forms bodies with MTHFR variants can actually use.
Is it only for women?
It's formulated around women's needs, but there's nothing in it men can't take. Plenty of husbands quietly borrow the bottle.
What if it doesn't work for me?
Then you don't pay for it. Take it daily for up to 60 days, and if you don't feel a difference, reply to your order email for a full refund. Keep the bottles. No forms, no questions, no return label.
If Your Nights Start At 2:47am
And your days start with coffee you don't even taste, these are worth trying. Two small capsules with breakfast. Sixty days to feel it, on us if you don't.
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