Magnesium carbonate is magnesium bound to carbonic acid, an inorganic form with a relatively high elemental magnesium concentration. In the stomach, it reacts with gastric acid and converts to magnesium chloride, which is then absorbed in the intestine. This reaction gives carbonate a mild antacid effect, making it a popular choice for people who also experience occasional acid discomfort. Bioavailability is moderate — lower than organic chelated forms like glycinate or citrate, but higher than oxide in some studies. Labels show the elemental magnesium content (what your body uses) and sometimes the compound weight. Some products may list 'magnesium hydroxy carbonate' as the specific compound form. This page compares products by elemental magnesium content. Products below are ranked by cost at your chosen daily dose.
| # | Product | 30-day cost | Supply | Sticker | |
|---|---|---|---|---|---|
| 1 |
Pure Original Ingredients Magnesium Carbonate, Magnesium Supplement, Non-GMO, Multi-Purpose (2 Pound)
PURE ORIGINAL INGREDIENTS Store
|
$0.34 | 1134d | $20.69 | View on Amazon |
| 2 |
Pure Original Ingredients Magnesium Carbonate (1 lb) Magnesium Supplement, Non-GMO, Multi-Purpose
PURE ORIGINAL INGREDIENTS Store
|
$0.50 | 566d | $14.99 | View on Amazon |
| 3 |
Pure Original Ingredients Magnesium Carbonate (8oz) Magnesium Supplement, Non-GMO, Multi-Purpose
PURE ORIGINAL INGREDIENTS
|
$0.63 | 283d | $9.49 | View on Amazon |
| 4 |
BulkSupplements.com Magnesium Carbonate Powder - Magnesium Supplement, Mag Carbonate Powder - Pure Magnesium, Gluten Free, 875mg (210mg Magnesium) per Serving, 1kg (2.2 lbs)
BulkSupplements Store
|
$0.71 | 1257d | $26.97 | View on Amazon |
| 5 |
BulkSupplements.com Magnesium Carbonate Powder - Magnesium Supplement, Mag Carbonate Powder - Pure Magnesium, Gluten Free, 875mg (210mg Magnesium) per Serving, 500g (1.1 lbs)
BulkSupplements Store
|
$0.89 | 628d | $16.97 | View on Amazon |
| 6 |
Pure Original Ingredients Magnesium Carbonate (4oz) Magnesium Supplement, Non-GMO, Multi-Purpose
PURE ORIGINAL INGREDIENTS
|
$1.10 | 141d | $8.29 | View on Amazon |
| 7 |
2 Pack Magnesium Carbonate 500mg Gummies, High Absorption Magnesium Supplement for Adults - Support Muscle Function, Vegan, Sugar Free, Raspberry Flavor, 120 Count
Youlikee Store
|
$4.99 | 150d | $9.97 | View on Amazon |
| 8 |
duwhot Magnesium Carbonate 500mg, High Absorption Supplement for Digestive Health, Muscle & Nerve Function, 3 Month Supply, Vegan, Non-GMO, Gluten-Free, 90 Capsules
duwhot Store
|
$7.33 | 225d | $21.99 | View on Amazon |
| 9 |
Magnesium Carbonate 500mg Gummies, High Absorption Magnesium Supplement for Adults - Support Muscle Function, Vegan, Sugar Free, Raspberry Flavor, 60 Count
Youlikee Store
|
$8.97 | 75d | $8.97 | View on Amazon |
| 10 |
Magnesium Carbonate 500mg Gummies, Magnesium Supplement for Muscle & Digestive Support, High Absorption Formula, Vegan, Pineapple Flavor, 60 Chewables
GREABBY Store
|
$19.99 | 75d | $19.99 | View on Amazon |
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