"When I work with someone one-on-one, one of the first things I have them do is line up every supplement they take. Often, we throw most of them out. Magnesium is a perfect example. People get stressed, read that they need magnesium, and start stacking 2,000 mg of a lab-made capsule at night and another kind in the morning. That's a very American way to supplement: more, more, more. What your body actually wants is the right magnesium, at the right dose, every day."
— Jordan Dorn, Certified Holistic Nutritionist and co-founder of Zuma Nutrition
Key takeaways
- Ionic magnesium is magnesium that's already dissolved in water as free magnesium ions, usually from naturally occurring magnesium chloride.
- Many magnesium supplements are made in a lab through chemical reactions. Magnesium chloride can come straight from ancient sea mineral brines, concentrated by evaporation.
- Soluble forms like magnesium chloride and citrate are absorbed better than magnesium oxide, and smaller doses through the day are absorbed more efficiently than one big dose.
- Magnesium works as part of a team of minerals. Megadosing one isolated mineral isn't the goal. Balance is.
- The easiest way to take it: a dropper in your water, any time of day.
In this article 16 sections
Magnesium started in the sea
Long before magnesium came in a capsule, it came in water. After sodium, magnesium is the most abundant mineral element dissolved in seawater. Ancient oceans laid down vast deposits of magnesium-rich salts, and as inland seas dried and shrank over millions of years, they left behind concentrated mineral brines: magnesium chloride alongside dozens of trace minerals, exactly as nature mixed them.
For most of human history, people got magnesium the same way: from mineral-rich springs and well water, from whole foods grown in mineral-rich soil, and from the sea. Magnesium wasn't a supplement. It was simply part of the water and food.
Today, that's changed in three big ways.
Why so many people come up short on magnesium today
1. We filter the minerals out of our water
Reverse osmosis and many home filtration systems are excellent at removing what you don't want in your water. They also remove most of what you do want, including naturally occurring magnesium and calcium. Clean water is a great thing. But filtered water is often mineral-empty water.
2. Our diets don't make up the difference
The best food sources of magnesium are leafy greens, nuts, seeds, beans and whole grains, and most people don't eat enough of them. According to national NHANES dietary data, nearly half of Americans get less magnesium from food than they need. Some research also suggests the mineral content of certain crops has declined over the decades as farming has intensified.
3. Modern life asks more of us
Magnesium is involved in more than 300 enzyme reactions in the body, including energy production, muscle function and the nervous system. Busy, stressful city lives, hard training, coffee and long days all keep that system working overtime.
So people head to the supplement aisle. And that's where it gets confusing.
The supplement aisle problem: lab-made magnesium
Here's something most people never think about: many magnesium supplements are manufactured in a lab through chemical reactions.
- Magnesium oxide is typically made by heating mined mineral rock to very high temperatures. It's cheap and packs a lot of magnesium per pill, which is why it's common in budget supplements and "buffered" blends. But it barely dissolves in water, and studies show it's poorly absorbed.
- Magnesium glycinate is made by chemically bonding magnesium to the amino acid glycine.
- Magnesium citrate is made by reacting a magnesium base with citric acid.
- Magnesium threonate, malate and taurate are also manufactured pairings of magnesium with another compound.
These are legitimate, widely used ingredients, and some, like citrate and glycinate, are well absorbed. But they're manufactured compounds, often sourced overseas, and they're usually sold as single, isolated minerals at high doses. That's the "more is better" approach Jordan sees every day in his practice: people taking a lot of an isolated, lab-made mineral, with no idea where it came from.
What "ionic" magnesium actually means
In nature, magnesium is always paired with something. Every magnesium supplement is magnesium plus a partner: oxygen (oxide), glycine (glycinate), citric acid (citrate) or chloride (chloride).
When a magnesium salt dissolves in water, it separates into electrically charged particles called ions. Magnesium becomes Mg²⁺, the form your body actually absorbs and uses. That's what "ionic" means.
With a capsule or tablet, that has to happen inside your digestive tract first: the capsule breaks down, the compound dissolves (or doesn't, in the case of oxide), and only then is the magnesium free to be absorbed. With a liquid ionic magnesium, that step has already happened in the bottle. You're drinking magnesium that's already dissolved and ready to go.
Why magnesium chloride from ancient sea minerals
Magnesium chloride is the same pairing nature uses in seawater and ancient sea brines. That means it doesn't have to be built in a lab. It can be gathered from natural mineral brine and concentrated by evaporation, the same way sea salt is made.
That's exactly how Zuma Nutrition Ionic Magnesium Chloride Tonic is made. Our formulator specializes in ancient mineral salts and is a purist about process:
- Ancient inland sea minerals, concentrated naturally
- No synthetic solvents, ever
- Made in the USA
- Third-party tested, with the certificate of analysis on the product page
Most people have never thought about how their magnesium is made. Once you know, it's hard to go back to a lab-made isolate.
Magnesium with its natural team: 70+ trace minerals
Magnesium never shows up alone in nature. Sea brines carry it alongside a full spectrum of trace minerals and electrolytes, including potassium, sulfate, boron and many more in trace amounts. Most magnesium supplements strip all of that away and give you a single isolated compound.
We keep magnesium in its natural company with 70+ ancient inland trace ocean minerals. Minerals work as a team in the body. Magnesium, calcium, potassium and others constantly interact, and taking huge amounts of any one isolated mineral can throw the others out of balance. As Jordan puts it, "That's why I don't like taking minerals in isolated form. Balance, not more."
(Curious about how minerals interact? Read our guide to the calcium, magnesium and zinc ratio.)
Finished with biodynamic botanicals
Every bottle is finished with biodynamic organic rosemary and lavender hydrosols from a Demeter-certified biodynamic farm in Northern California. Demeter is one of the most rigorous farming certifications there is: farms are managed as whole living ecosystems, going beyond organic standards.
Hydrosols are the gentle aromatic waters left after steam-distilling herbs. They complete the formula naturally, with no artificial flavors, colors or preservatives.
What the research says about absorption
The science on magnesium forms is smaller than the marketing suggests. Here's what's consistent:
- Soluble forms absorb better than oxide. The NIH Office of Dietary Supplements notes that forms that dissolve well in liquid are absorbed more completely, and that small studies found magnesium aspartate, citrate, lactate and chloride more bioavailable than magnesium oxide and sulfate.
- Magnesium chloride is in the well-absorbed group. In a frequently cited 2001 study, magnesium chloride, lactate and aspartate were absorbed significantly better than magnesium oxide, which had a fractional absorption of only about 4%.
- Smaller doses absorb more efficiently. Research shows the percentage of magnesium your body absorbs drops as a single dose gets bigger. That's a strong argument against megadosing, and for a sensible dose you can split through the day in your water.
Ionic magnesium vs. glycinate, citrate and oxide
| Ionic magnesium chloride (Zuma Nutrition) | Magnesium glycinate | Magnesium citrate | Magnesium oxide | |
|---|---|---|---|---|
| Source | Ancient sea mineral brine | Lab-bonded to glycine | Lab-reacted with citric acid | Heated mineral rock |
| Form | Liquid, already dissolved | Capsule or powder | Capsule or powder | Tablet |
| Absorption | Well absorbed | Well absorbed | Well absorbed | Poorly absorbed |
| Trace minerals | 70+ naturally occurring | None | None | None |
| Easy to split through the day | Yes, drops in water | Harder | Harder | Harder |
| Pills to swallow | None | Often large capsules | Yes, or a powder | Yes |
How much magnesium do you need?
The recommended daily intake for adults is 310–420 mg of magnesium, depending on age and sex. That's your total from food and supplements combined. The upper limit for magnesium from supplements is 350 mg per day for adults.
One serving of Zuma Nutrition Ionic Magnesium Chloride Tonic (2 droppers, 1.5 ml) provides 133 mg of magnesium, about a third of the daily value. That's a meaningful, sensible amount that fills the gap alongside a whole-food diet, without the megadose. Each 2 oz bottle has 40 servings.
How to take it: the "level up your water" ritual
- Add 1–2 droppers to your water. A glass, a big water bottle, or a pitcher.
- Any time of day. Forget the "one magnesium in the morning, another at night" routine. Consistency matters more than timing.
- Always dilute. Straight from the dropper it tastes salty, like ocean brine. In water it's colorless, odorless and practically undetectable.
How Jordan uses it: "I keep it on the counter next to my Fulvic Acid & Trace Ocean Minerals. I have a reverse osmosis system, and I add both to my water. I'm getting fulvic and humic acids, trace ocean minerals and a really nice dose of liquid magnesium. It's the easiest way to level up your drinking water."
Who it's for
- Anyone drinking filtered or reverse osmosis water
- People who want magnesium to support muscle relaxation, normal nerve function and restful sleep*
- Busy, stressed, depleted city lives
- Active people and athletes who want minerals in their water bottle all day
- People who don't like swallowing pills
- Anyone who'd rather take a natural mineral than another lab-made isolate
Who should be careful
Talk to your healthcare practitioner before taking magnesium if you have kidney disease, are pregnant or nursing, or take medications, especially certain antibiotics, osteoporosis medications (bisphosphonates), diuretics or acid reducers. Magnesium can interact with these, and timing matters. Keep out of reach of children.
What customers say
"I tried a couple different kinds of magnesium to help with relaxation and sleep and it's the only one that made it for me."
— Raphaëlle P., verified buyer
"Great for a good night's sleep."
— Kirsten W., verified buyer
"Since taking this product I have seen an increase in my energy throughout the day. I also feel more relaxed."
— Megan M., verified buyer
Frequently asked questions
What is ionic magnesium?
Ionic magnesium is magnesium that's already dissolved in water as free magnesium ions (Mg²⁺). Ours comes from naturally occurring magnesium chloride from ancient inland sea minerals.
Is ionic magnesium better than magnesium glycinate?
They're different. Glycinate is a lab-made compound in capsule form. Ionic magnesium chloride is a naturally sourced mineral that's already dissolved, comes with 70+ trace minerals, and is easy to add to water and adjust. Both are absorbed far better than magnesium oxide. If you prefer natural minerals and no pills, ionic liquid magnesium is the better fit.
Does liquid magnesium absorb faster than capsules?
Ionic magnesium is already dissolved, so there's no capsule or tablet to break down first. Research also shows smaller doses are absorbed more efficiently, which is easy with a liquid you sip through the day.
Is magnesium chloride natural?
It can be. Magnesium chloride occurs naturally in seawater and ancient sea brines and can be concentrated by evaporation. Ours comes from ancient inland sea minerals with no synthetic solvents.
Does ionic magnesium cause loose stools?
Very high doses of any magnesium can loosen stools. At 133 mg per serving, well under the 350 mg supplemental upper limit, most people take it comfortably. Start with one dropper if you're sensitive.
What does it taste like?
Straight, salty like ocean brine. Diluted in water, colorless, odorless and practically undetectable.
Can I take it with Fulvic Acid?
Yes. It's how our co-founder takes it: both in the same glass of filtered water for a complete mineral upgrade.
Morning or night?
Either. Take it whenever it fits your routine. Consistency matters more than timing.
Is it tested?
Yes. Every Zuma Nutrition product is third-party tested, and the certificate of analysis is on the product page.
The bottom line
You don't need more magnesium. You need the right magnesium: a natural mineral from ancient seas, already dissolved, with its full team of trace minerals, at a sensible dose you'll actually take every day.
Shop Zuma Nutrition Ionic Magnesium Chloride Tonic →
133 mg ionic magnesium per serving · 70+ trace minerals · biodynamic botanicals · made in the USA · lab tested
Related reading: Magnesium Glycinate vs. Citrate · Different Types of Magnesium · Calcium, Magnesium & Zinc Ratio · Best Magnesium for Sleep · Magnesium Side Effects
Sources
- NIH Office of Dietary Supplements. Magnesium: Fact Sheet for Health Professionals. ods.od.nih.gov
- Firoz M, Graber M. Bioavailability of US commercial magnesium preparations. Magnes Res. 2001;14(4):257-62.
- Fine KD, et al. Intestinal absorption of magnesium from food and supplements. J Clin Invest. 1991;88(2):396-402.
- Lindberg JS, et al. Magnesium bioavailability from magnesium citrate and magnesium oxide. J Am Coll Nutr. 1990;9(1):48-55.
- USDA ARS. What We Eat in America, NHANES 2013–2016: usual nutrient intake from food and beverages.
*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.