Magnesium Citrate vs Magnesium Malate
Magnesium Citrate and Magnesium Malate compared on absorption, gut tolerance, and real cost per dose — the cheapest of each pulled live from the Amazon US catalog.
Updated October 2026
Side by side
| Attribute | Citrate | Malate |
|---|---|---|
| GI effect | Can loosen stools | Gentle |
| Elemental Mg | ~16% | ~15% |
| Best for | General use, constipation-prone | Sensitive stomach |
| Extra claims | — | Energy, fibromyalgia (weak evidence) |
| Active deals tracked | 21 | 13 |
| Cheapest cost per dose | $0.06 (per 500 mg) | $0.06 (per 1500 mg) |
Both are soluble organic salts, and citrate is absorbed notably better than oxide; direct citrate-versus-malate data in people is scarce. Elemental magnesium per gram is similar — about 16% for citrate and 15% for malate.
Which to avoid / caveats
- Compare cost per elemental / active content, not the compound milligrams printed on the label — a bigger number on the front can hide less of what you actually absorb.
- The cheapest sticker price isn’t always the best value: our “cheapest per dose” figures normalise price across bottle sizes, so a larger count only wins if it truly costs less per serving.
Elemental magnesium: Magnesium Citrate vs Magnesium Malate
By weight, Magnesium Citrate is about 16% elemental magnesium (~160 mg per 1,000 mg), while Magnesium Malate is about 15% (~150 mg per 1,000 mg). A higher elemental percentage isn’t automatically the better buy — a well-absorbed low-percentage form can beat a poorly-absorbed high-percentage one, so weigh this against absorption above and compare the “magnesium” line in the Supplement Facts panel, not the number on the front of the bottle.
It’s also why the per-serving costs above aren’t strictly comparable per milligram of elemental magnesium: some labels state the elemental amount while others list the heavier salt weight (so a bigger “mg” number can actually be less magnesium). For a true per-elemental-mg comparison, divide the price by the elemental milligrams shown on the Supplement Facts panel.
Magnesium CitrateWell absorbed
Best for: General use, especially if you are prone to constipation.
Best Magnesium Citrate by cost per doseMagnesium Malate
Best for: Sensitive stomachs and daytime use.
Best Magnesium Malate by cost per doseCheapest Magnesium Citrate
NEW
🌙 Magnesium
Vitamatic Magnesium Citrate 500mg per Serving - 180 Vegetarian…
Cost per serving
$0.06
180 servings · ~180-day supply
Well absorbed
$9.99Price from Amazon.com
Vitamatic · Amazon.com 0
See the offer Cheapest Magnesium Malate
NEW
🌙 Magnesium
NatureBell Magnesium Malate 1,500mg
Cost per serving
$0.06
240 servings · ~240-day supply
$13.99Price from Amazon.com
NatureBell · Amazon.com 0
See the offer Frequently asked
Is magnesium malate or citrate better?+
Neither is clearly better absorbed. Choose citrate if a mild laxative effect helps you, malate if you want the gentler option. Both beat oxide on absorption. Not medical advice.
Which is better for constipation, citrate or malate?+
Citrate. It draws water into the bowel, which is why it is also sold as an over-the-counter laxative. Keep supplemental magnesium at or under 350 mg a day unless a doctor advises otherwise. Not medical advice.
Is Magnesium Citrate or Magnesium Malate cheaper per dose?+
The cheapest Magnesium Citrate we track is $0.06 per serving; the cheapest Magnesium Malate is $0.06 per serving — so Magnesium Citrate costs less per dose right now (October 2026).
Is Magnesium Citrate or Magnesium Malate higher in elemental magnesium?+
By weight, Magnesium Citrate is about 16% elemental magnesium (~160 mg per 1,000 mg) and Magnesium Malate is about 15% (~150 mg per 1,000 mg). A higher elemental percentage isn't automatically better value — absorption differs by form, so weigh the "magnesium" line in the Supplement Facts panel against price and absorption, not the front-label number.
How much Magnesium do you need per day?+
RDAs depend on age and sex. Adult men need 400-420 mg; adult women need 310-320 mg. Pregnancy is 350-400 mg and lactation 310-360 mg. Children range from 80 mg (1-3 years) to 240 mg (9-13 years); infants have AIs of 30-75 mg. — per the NIH Office of Dietary Supplements; general information, not medical advice.
Can you take too much Magnesium?+
Yes. The Tolerable Upper Intake Level for supplemental magnesium is 350 mg for adults. High supplement or medication doses can cause diarrhea, nausea, and abdominal cramping. Very high doses cause toxicity: hypotension, vomiting, difficulty breathing, irregular heartbeat, and cardiac arrest; fatal hypermagnesemia has occurred. — per the NIH Office of Dietary Supplements; general information, not medical advice.
Dosage & safety answers sourced from the NIH Office of Dietary Supplements. General information, not medical advice.
What the research says
Too much magnesium from food does not pose a health risk in healthy individuals because the kidneys eliminate excess amounts, but high doses from dietary supplements or medications often cause diarrhea, nausea, and abdominal cramping. The Tolerable Upper Intake Level (UL) for supplemental magnesium is 350 mg/day for adults — per the NIH Office of Dietary Supplements.
Groups more likely to be at risk of magnesium inadequacy include people with gastrointestinal diseases (such as Crohn's disease and celiac disease), people with type 2 diabetes, people with alcohol dependence, and older adults. Early signs and symptoms of deficiency include loss of appetite, nausea, vomiting, fatigue, and weakness; as it worsens, numbness, tingling, muscle contractions and cramps, seizures, personality changes, abnormal heart rhythms, and coronary spasms can occur, and severe deficiency can cause hypocalcemia or hypokalemia — per the NIH Office of Dietary Supplements.
Related
Best Magnesium Citrate by cost per doseBest Magnesium Malate by cost per doseMagnesium Citrate dosage & factsMagnesium Malate dosage & factsSupplement price-spread study
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References & sources
- Health Professional fact sheet — NIH Office of Dietary Supplements
- USP Verified product participants — U.S. Pharmacopeia
- NSF certified products — NSF
We link primary sources and paraphrase their findings — never copy their text, tables, or images. Cost-per-dose figures are our own first-party catalog data.