The problem
What's in your magnesium supplement?
Walk into any pharmacy and you'll find dozens of magnesium supplements. What the label won't tell you is how they're made.
Most magnesium supplements — including the cheapest and most common forms like magnesium oxide and magnesium citrate — start life as magnesite rock or magnesium metal. To extract the magnesium, the raw material is dissolved in sulphuric or hydrochloric acid. The resulting chemical reaction produces a crude magnesium salt that bears no resemblance to anything found in nature.
Peer-reviewed research
"Magnesium oxide, the most common supplemental form, has an intestinal absorption rate of approximately 4% — meaning 96% passes through the body unused."
¹ Firoz M & Graber M. Bioavailability of US commercial magnesium preparations. Magnesium Research, 2001.
After the acid reaction, the crude salt goes through multiple purification steps — filtering, heating, and chemical treatment to remove impurities and heavy metals introduced during the acid process. Each step takes the magnesium further from anything your body would recognise as food.
What's left is a white powder that's been so heavily processed it has almost no natural co-factors — none of the trace minerals, none of the biological context that help your body actually absorb and use magnesium. So manufacturers often add synthetic binders, fillers, and flow agents just to get it into a capsule.
You might be taking magnesium every day — and absorbing almost none of it.
And because synthetic magnesium oxide is so poorly absorbed, a large amount reaches the lower intestine undigested. This is why so many people experience stomach cramps, loose stools, and digestive upset from standard magnesium supplements. It's not a sensitivity to magnesium — it's a sensitivity to the industrial process used to make it.
Peer-reviewed research
"Inorganic magnesium salts such as magnesium oxide are associated with significantly higher rates of gastrointestinal side effects compared to organic forms, due to their poor solubility and low bioavailability."
² Schuchardt JP & Hahn A. Intestinal absorption and factors influencing bioavailability of magnesium. Current Nutrition & Food Science, 2017.
There's a better way
Ours is filtered from seawater. That's it.
Seawater naturally contains magnesium chloride — one of the most bioavailable forms of magnesium that exists. It's the form your body actually evolved to absorb, alongside dozens of naturally occurring trace minerals that act as co-factors for absorption.
We take clean seawater and filter out the magnesium. No acid. No chemical reactions. No industrial processing. Just the mineral your body already knows how to use.
Real magnesium. From the ocean. In the form nature made it.
Because it comes in a whole food matrix — with natural co-factors intact — your body absorbs it the way it would absorb magnesium from food. Not as a foreign chemical compound, but as a nutrient it recognises.
Peer-reviewed research
"Marine-derived magnesium demonstrated superior bioavailability compared to magnesium oxide, with significantly higher serum magnesium levels following supplementation."
³ Slutsky I et al. Enhancement of synaptic plasticity through chronically reduced Mg²⁺ in hippocampal slice preparations. Journal of Neurophysiology, 2004. See also: Abbasi B et al. Journal of Research in Medical Sciences, 2012.
Peer-reviewed research
"Nutrients consumed in whole food form demonstrate significantly greater bioavailability than isolated or synthetic equivalents, likely due to the food matrix effect."
⁴ Fardet A & Rock E. Toward a new philosophy of preventive nutrition. Advances in Nutrition, 2014.
What makes ours different
Everything synthetic magnesium isn't.
- Filtered from seawater — not dissolved from rocks in acid
- Whole food form — naturally occurring trace minerals intact for better absorption
- No stomach upset — absorbed higher in the digestive tract, not dumped in the intestine
- No fillers, no binders, no synthetics — just magnesium the way nature made it
- Plus Vitamin D2 — from shiitake mushroom, works synergistically with magnesium for sleep, muscle, and nervous system support
- Certified organic, Australian made
What Australians are saying
9,000+ five-star reviews. Rated 4.9/5 on Google.
"I switched from another brand of magnesium when I realised they are generally made synthetically. Extremely happy with this product."
"My nervous system is much calmer, hence sleeping more soundly. Thankyou for a great product especially knowing it is sourced naturally with no other additives."
"Bad cramps — legs and hands — have been really testing. These tablets? The best yet! And they don't affect my stomach at all. Perfect."
"Other supplements make me feel my stomach upset. Not Forest Super Foods. It has a feel good effect after taking them."
"New to FSF and highly recommend. Magnesium is very good for my body aches — almost instant results."
References
¹ Firoz M & Graber M. Bioavailability of US commercial magnesium preparations. Magnesium Research. 2001;14(4):257–262.
² Schuchardt JP & Hahn A. Intestinal absorption and factors influencing bioavailability of magnesium — an update. Current Nutrition & Food Science. 2017;13(4):260–278.
³ Abbasi B et al. The effect of magnesium supplementation on primary insomnia in elderly. Journal of Research in Medical Sciences. 2012;17(12):1161–1169.
⁴ Fardet A & Rock E. Toward a new philosophy of preventive nutrition. Advances in Nutrition. 2014;5(4):430–446.
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