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Source Naturals vs Designs for Health Magnesium Malate (2026)
Disclosure: We earn commissions on purchases made through our links. This never influences our scores. Editorial policy
The Verdict
These two tie at 88 on our 0-100 execution score, and our sort rule breaks the tie on cost per effective dose, which puts Source Naturals first. Purity verification ties at 19. Designs for Health wins transparency 25 to 22 and dosing and form 25 to 23; Source Naturals wins value 24 to 19. Source Naturals holds our Best Value badge and our Top Pick badge sits with a third product. In our view the tie is real and the choice is mostly a format preference: three tablets a day at about thirteen cents, or two capsules at about fifty-five. Designs for Health earns its dosing pillar honestly, by putting clinical-range elemental magnesium into two capsules instead of three or four tablets, and its label is the most explicit in the category, naming dimagnesium malate rather than generic magnesium malate.
Where our profile pushes back is on the premise rather than either product: it says magnesium malate has no proven advantage over glycinate or citrate for raising magnesium status, that the fibromyalgia evidence is small, old, and partly negative when blinded, and that if your goal is sleep you should buy glycinate while if it is constipation relief you should buy citrate.
Magnesium Malate 1250mg, 360 Tablets
Source Naturals
Magnesium Malate 360mg, 120 Capsules
Designs for Health
Head-to-Head Comparison
| Category | Magnesium Malate 1250mg, 360 Tablets Source Naturals | Magnesium Malate 360mg, 120 Capsules Designs for Health |
|---|---|---|
| Brand Score | 88/100Winner | 88/100 |
| Dosing & Form | 23/25 | 25/25Winner |
| Purity | 19/25Winner | 19/25 |
| Value | 24/25Winner | 19/25 |
| Transparency | 22/25 | 25/25Winner |
| Cost/Day | $0.13Winner | $0.55 |
| Dose/Serving | 141mg | 360mg |
| Form | magnesium malate trihydrate (tablet) | dimagnesium malate (capsule) |
| Third-Party Tested | No | ✓ Yes |
| Proprietary Blend | No | No |
Why This Comparison Matters
These two tie on our rubric at 88, and they are about as different as two magnesium malate products get: a 360-tablet bulk bottle against a practitioner-channel capsule, roughly four times apart on cost per day.
Both do the thing our profile says to insist on, which is disclosing elemental magnesium rather than compound weight. Source Naturals prints 141mg elemental per 1250mg tablet, so three tablets reach 423mg elemental, and our notes call that disclosure rare for the category. Designs for Health specifies dimagnesium malate and delivers 360mg elemental in a 2-capsule serving, which our notes describe as the highest elemental amount per serving in this lineup. Neither carries USP or NSF certification on the SKU and both are GMP manufactured.
On cost, Source Naturals is about $0.13 a day for 423mg elemental from a $22.50 bottle of 360 tablets, and Designs for Health is about $0.55 a day for 360mg elemental from a $33.00 bottle of 60 servings. Our profile's target is 200 to 400mg of elemental magnesium daily, and it warns that a 1000mg magnesium malate capsule typically delivers only 150 to 200mg elemental.
Detailed Score Breakdown
Magnesium Malate 1250mg, 360 Tablets
Source Naturals
Magnesium malate at 141mg elemental per tablet from 1250mg malate compound; 3 tablets reach 423mg elemental, matching the upper clinical range
GMP-compliant facility, Source Naturals has a long market track record, no USP/NSF certification on this SKU
About $0.13/day for 423mg elemental (3 tablets) from the 360-count bottle - strong per-effective-dose value
Discloses both compound weight (1250mg) and elemental Mg (141mg) per tablet, which is rare for the category
Source Naturals was one of the first US brands to ship a stand-alone magnesium malate SKU and remains the per-mg value leader on Amazon
Magnesium Malate 360mg, 120 Capsules
Designs for Health
Dimagnesium malate form delivering 360mg elemental per serving (2 caps) - directly matches the upper clinical range without needing tablet stacking
Practitioner-channel brand with GMP manufacturing and tight ingredient sourcing; no USP/NSF on this SKU
About $0.55/day at 360mg elemental - premium pricing reflects practitioner-grade positioning and dimagnesium malate form
Specifies dimagnesium malate (not generic magnesium malate), discloses elemental amount, no proprietary blends
The pick for people who want clinical-range elemental Mg from a practitioner-grade brand without swallowing 3-4 tablets
How We Compared These Products
Every product in our database is scored on four equally-weighted pillars: dosing accuracy and form quality, purity verification (third-party testing), cost per clinically effective dose (not cost per pill), and label transparency. Each pillar is worth 25 points for a total of 100.
Cost per effective dose is calculated using the clinically studied dose from published research, not the manufacturer's suggested serving. If a product requires multiple servings to reach the dose used in clinical trials, that cost is reflected in the value score.
For a full explanation of our scoring methodology, see our methodology page. Prices were last checked on the dates listed for each product and may have changed.
Frequently Asked Questions
How much elemental magnesium does each one deliver?
Source Naturals prints 141mg elemental per 1250mg tablet, so its 3-tablet serving reaches 423mg. Designs for Health delivers 360mg elemental in a 2-capsule serving. Our profile's target is 200 to 400mg elemental daily, and it warns that a typical 1000mg magnesium malate capsule delivers only 150 to 200mg elemental, which is why both products disclosing the elemental number matters.
Which magnesium malate is cheaper per day?
Source Naturals, at about $0.13 a day against Designs for Health at about $0.55. The bottles are $22.50 for 360 tablets, which our notes call roughly four months at 3 tablets a day, and $33.00 for 60 servings. Our value pillar scores that 24 to 19.
Why do these two tie on your score?
They win opposite pillars by similar margins. Designs for Health takes transparency 25 to 22 and dosing and form 25 to 23, on the dimagnesium malate specification and 360mg elemental in two capsules. Source Naturals takes value 24 to 19 on price. Purity verification is identical at 19. Our sort rule breaks the 88-88 tie on the cheaper cost per effective dose.
More Magnesium Malate Comparisons
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FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. Dietary supplements are not intended to diagnose, treat, cure, or prevent any disease. Always consult with a qualified healthcare professional before starting any supplement regimen.